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Feng P et al., PNAS - This paper describes a bipartite antisense oligonucleotide (5D‑ASO) design that appends a short 5′ splice site decoy tail to improve exon skipping, demonstrating robust efficacy for DMD exon 51 in cells, mice, and cynomolgus monkeys with a favorable safety profile. Key terms: antisense oligonucleotide, exon skipping, Duchenne muscular dystrophy, U1 snRNA decoy, dystrophin restoration. Study Highlights:The authors developed a bipartite ASO approach (5D‑ASO) that appends a short 5′ splice site–complementary tail to enhance exon skipping. An optimal 7–8 nt decoy appended to exon 51 ASOs markedly increased exon skipping in human cells and in multiple genetically modified mouse models, restoring dystrophin and improving muscle function. The lead MOE/PS 5D‑ASO showed durable tissue retention, dose‑dependent efficacy, and an overall favorable safety profile in mice and cynomolgus monkeys. The method was operative across multiple genes and exon targets, indicating broad applicability. Conclusion:Appending a short 5′ splice site decoy to exon‑targeting ASOs substantially increases exon‑skipping potency and therapeutic benefit in preclinical DMD models, supporting further clinical development of 5D‑ASO designs. Music:Enjoy the music based on this article at the end of the episode. Article title:An antisense method for efficient exon skipping and its application to Duchenne muscular dystrophy First author:Feng P Journal:PNAS DOI:10.1073/pnas.2606494123 Reference:Feng P., Gao P., Meng S., Yuan Y., Krainer A.R., Hua Y. An antisense method for efficient exon skipping and its application to Duchenne muscular dystrophy. PNAS. 2026;123(33):e2606494123. doi:10.1073/pnas.2606494123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/base-by-base-443-5d-aso-dmd QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-08-18. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the core narrative: Duchenne muscular dystrophy background; 5D-ASO design and 5′ splice site decoy tail mechanism; U1 snRNP decoy action; in vitro exon 51 skipping in RD cells; in vivo huEx51/huΔ52 mice data including dystrophin restoration; cynomolgus monkey efficacy/safety; off-target considerations; delivery- transcript topics: DMD background and dystrophin function; 5D-ASO design and 5′ splice site decoy tail mechanism; U1 snRNP decoy mechanism and splicing repression; In vitro exon skipping in RD cells (Etep-L8c and MOE-Etep); In vivo exon 51 skipping in huEx51/huΔ52 mice and dystrophin restoration; Cynomolgus monkey exon 51 skipping and safety QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 6- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- 5D-ASO tail acts as a decoy to misdirect U1 snRNP...

Rolseth AB et al., Proceedings of the National Academy of Sciences (PNAS) - This study links reduced Ca2+ entry through mutant TMC1 mechanotransducer channels to decreased PMCA2 pump density in outer hair cell stereocilia. PMCA2 turnover is rapid in the early postnatal period and is regulated by stereociliary Ca2+ via insertion from an apical vesicular pool; Neuroplastin (NPTN) later stabilizes the pump complex. Persistent pump reduction at hearing onset may contribute to hair cell mitochondrial dysfunction and death in Tmc1 mutants. Key terms: TMC1, PMCA2, hair cells, Ca2+ regulation, neuroplastin. Study Highlights:Tmc1 point mutations that reduce MET channel Ca2+ permeability show markedly decreased PMCA2 immunolabeling in outer hair cell bundles. PMCA2 density scaled with calculated Ca2+ entry, and experimental lowering of extracellular Ca2+ or pharmacological block of endocytosis or PtdIns(4,5)P2 synthesis reduced PMCA2 during the first postnatal week. PMCA2 is supplied from an apical vesicular pool, turns over rapidly before P11, and NPTN expression lags PMCA2 by ~2 days and less Ca2+ sensitivity, consistent with a stabilizing accessory role. The lower PMCA2 density persists at hearing onset and may contribute to mitochondrial dysfunction and subsequent hair cell death. Conclusion:Reduced stereociliary Ca2+ influx through mutant TMC1 channels decreases Ca2+-regulated insertion and rapid turnover of PMCA2 from an apical vesicular pool during early postnatal development. Because PMCA2 becomes less plastic after ~P11 and NPTN-mediated stabilization follows PMCA2 expression, early pump loss is maintained into hearing onset and may exacerbate intracellular Ca2+ dysregulation, mitochondrial impairment, and hair cell apoptosis in Tmc1 mutants. Music:Enjoy the music based on this article at the end of the episode. Article title:Ca2+ regulation of PMCA2 calcium pump expression in hair cells of Tmc1 deafness mutants First author:Rolseth AB Journal:Proceedings of the National Academy of Sciences (PNAS) DOI:10.1073/pnas.2607733123 Reference:Rolseth AB, Beurg M, Konrad DE, Augusta BK, Fettiplace R. Ca2+ regulation of PMCA2 calcium pump expression in hair cells of Tmc1 deafness mutants. Proc Natl Acad Sci U.S.A. 2026;123:e2607733123. doi:10.1073/pnas.2607733123. License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/ca2-regulation-pmca2-tmc1 QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-08-17. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the core scientific narrative in the transcript: MET Ca2+ permeability reductions in Tmc1 mutants, Ca2+-dependent PMCA2 regulation and vesicle trafficking, dynamic turnover and endocytosis, NPTN's stabilizing role, pharmacological perturbations (Pitstop2, PAO, GSK-1), endolymphatic potential effects at hearing- transcript topics: MET channel Ca2+ permeability in Tmc1 mutants; PMCA2 density regulation and Ca2+ entry relationship; Ca2+-dependent PMCA2 turnover and vesicle tra...

Tang X et al., PNAS - The authors apply an evolutionary sequence-covariation model to the Cav1.3 (CACNA1D) α1-subunit, map predicted pathogenicity onto structural models, and validate five predicted sites by patch-clamp electrophysiology and structural analysis. Predictions recapitulate known functional regions, reveal previously unrecognized clusters, and the tested variants produce diverse functional outcomes from nonconducting channels to gain- and loss-of-function gating changes. Key terms: Cav1.3, evolutionary modeling, CACNA1D, voltage-gated calcium channel, variant pathogenicity. Study Highlights:An evolutionary epistasis model predicted context-dependent conserved residues across Cav1.3 and recapitulated known functional sites. Mapping scores onto structural models highlighted novel clusters outside classical pore and voltage-sensor regions. Electrophysiological testing of five predicted variants confirmed diverse functional effects, including nonconducting (N745A), left-shifted activation (S635I, A376V, R1401A), and right-shifted or slowed gating (F1362A; Q1156E increased inactivation). The combined evolutionary, structural, and biophysical approach provides a scalable framework to prioritize and interpret CACNA1D variants. Conclusion:Evolutionary sequence-covariation combined with structural modeling and electrophysiology identifies novel functionally critical residues across Cav1.3 and enables rapid prioritization of pathogenic CACNA1D variants; the approach is generalizable to other ion channels but requires experimental follow-up to define gain- versus loss-of-function. Music:Enjoy the music based on this article at the end of the episode. Article title:Identification of novel functional sites in the Cav1.3 calcium channel α1-subunit using evolutionary modeling First author:Tang X Journal:PNAS DOI:10.1073/pnas.2602636123 Reference:Tang X, Hermenean HC, Yakimchyka A, Tuluc P, Ortner NJ, Liedl KR. Identification of novel functional sites in the Cav1.3 calcium channel α1-subunit using evolutionary modeling. PNAS. 2026;123(32):e2602636123. doi:10.1073/pnas.2602636123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/evolutionary-modeling-cav1-3-functional-sites QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-08-14. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the core scientific sections: evolutionary modeling predictions, structure mapping onto Cav1.3 models, electrophysiology validation in tsA-201 cells, and the functional effects of Cav1.3 variants (N745A, S635I, A376V, F1362A, R1401A, Q1156E); also reviewed limitations and clinical interpretation.- transcript topics: Evolutionary sequence covariation and context-dependent conservation in Cav1.3; Mapping pathogenicity scores onto Cav1.3 cryo-EM structures; Electrophysiological validation of Cav1.3 variants in tsA-201 cells; Functional consequences of specific Cav1.3 variants (N745A, S635I, A376V, F1362A, R1401A, Q1156E); Limitations...

Lamkina EN et al., PNAS - This episode reviews a PNAS brief report showing that DENV-4 infection induces marked DNA damage in infected cells while broadly suppressing transcription of DNA repair pathways, with selective upregulation of a mutagenic translesion polymerase and suppressed ATR expression. The findings raise concerns about long-term molecular "scars" after dengue infection that could influence cancer and postdengue syndromes. Key terms: Dengue, DENV-4, DNA damage, DNA repair, Genome instability. Study Highlights:Using Vero E6 and HUH-7 cells infected at MOI 0.1 and followed up to 5 days, the authors detected a large increase in γH2AX signaling indicating DNA damage. A 96-gene qPCR panel showed widespread suppression of DNA repair and DDR transcripts across multiple pathways while mismatch repair proteins remained stable. ATR protein expression was reduced and the mutagenic polymerase POLι was upregulated, telomere length and TRF2 were unchanged, and LC3 I/II levels decreased. The authors propose these changes create durable molecular vulnerabilities that warrant patient-based validation. Conclusion:DENV-4 causes significant host DNA damage while repressing many DNA repair transcripts, a combination that may leave lasting molecular scars and elevate long-term disease risk, but confirmation in patient samples is needed. Music:Enjoy the music based on this article at the end of the episode. Article title:DENV-4 infection suppresses transcription of DNA repair genes First author:Lamkina EN Journal:PNAS DOI:10.1073/pnas.2536909123 Reference:Lamkina EN, Reich J, Victora JA, et al. DENV-4 infection suppresses transcription of DNA repair genes. PNAS. 2026;123(32):e2536909123. doi:10.1073/pnas.2536909123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/base-by-base-denv4-dna-repair QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-08-12. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the main scientific narrative: DENV-4 infection at MOI 0.1 in Vero E6 and HUH-7 cells; γH2AX DNA damage; broad suppression of DDR/DNA repair transcription with selective maintenance of MMR; ATR suppression; telomere length/TRF2 status; autophagy marker LC3 I/II; POLι upregulation; serotype-specific contrasts; a- transcript topics: DENV-4 infection setup in vitro (MOI 0.1, 5 days, Vero E6 and HUH-7); γH2AX DNA damage signaling in infected cells; Broad suppression of DDR/DNA repair transcripts (BER, HR, NHEJ, NER) with MMR largely unchanged; ATR suppression and its consequence for DNA repair coordination; Telomere length and TRF2 status in infected cells; Maintenance of MMR proteins (MLH1, MSH2, MSH6) despite widespread suppression QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 6- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_jou...

Longo LM et al., PNAS - This episode summarizes a PNAS study introducing CLSS, a contrastive two-tower protein language model that coembeds domain sequences, structures, and subsequences into a shared 32-dimensional latent space. Trained self-supervised on one million ECOD domains, CLSS aligns sequence and structure modalities, yields compact embeddings that recapitulate ECOD and CATH hierarchies, outperforms several state-of-the-art PLMs on ProteinShake classification tasks, and powers an interactive viewer for exploring protein space. Key terms: contrastive learning, protein sequence, protein structure, protein domains, protein embeddings. Study Highlights:The authors developed CLSS, a contrastive two-tower model that coembeds full domain sequences, structures, and sampled subsequences into a single latent space. CLSS embeddings recapitulate expert ECOD and CATH hierarchical labels despite never using those labels during training. A subsequence-trained variant (CLSS-sub) meaningfully embeds fragments, and CLSS outperforms comparison PLMs on downstream ProteinShake classification benchmarks. Visualizations of CLSS maps reveal a strong partitioning of domains by cofactor binding and other functional annotations. Conclusion:CLSS demonstrates that sequence and structure can be jointly organized into a compact, informative embedding space that captures domain hierarchy, subsequence reuse, and functional preferences; these embeddings enable efficient downstream classification, visualization, and potential applications in database search, alignment, protein design, and evolutionary analysis. Music:Enjoy the music based on this article at the end of the episode. Article title:Contrastive learning unites sequence and structure in a global representation of protein space First author:Longo LM Journal:PNAS DOI:10.1073/pnas.2532702123 Reference:Longo LM, Yanai G, Axel G, Kolodny R, Ben-Tal N. Contrastive learning unites sequence and structure in a global representation of protein space. PNAS. 2026;123(32):e2532702123. doi:10.1073/pnas.2532702123. License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/clss-contrastive-sequence-structure-protein-space QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-08-11. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited transcript portions describing CLSS concept and motivation, two-tower architecture, CLSS-sub subsequences, training on ECOD domains, evaluation on ProteinShake, TSNE visualizations, cofactor and zinc-binding patterns, and limitations.- transcript topics: CLSS concept and motivation; Two-tower architecture: sequence tower (ESM2) and frozen structure encoder (ESM3); CLSS-sub subsequences (20-60 residues); Self-supervised training on ~1 million ECOD domains; Evaluation on ProteinShake and ECOD/CATH hierarchies; t-SNE visualizations showing coembedding of sequence and structure QC Summary:- factual score: 10/10- metadata score: 10/10- supported c...

Axakova A et al., The American Journal of Human Genetics - Axakova et al. generated a variant effect map for AIRE using an insulin‑promoter GFP reporter in HEK293 cells to measure the functional impact of 9,790 missense substitutions and provide calibrated evidence for clinical variant interpretation. Key terms: AIRE, missense variants, variant effect map, APS-1, functional assay. Study Highlights:The authors used an insulin‑promoter‑driven GFP reporter in HEK293 cells and a DT‑POPCode mutagenesis library to assay 9,790 AIRE missense variants. The resulting map recapitulated known functional regions (CARD, SAND, PHD2, C‑terminal), revealed both loss‑ and gain‑of‑function changes, and exposed a blind spot for PHD1 in this assay. Benchmarking against ClinVar and computational predictors enabled calibrated evidence for 70% of ClinVar VUSs and supported reclassification of 32% (109/345) of VUSs. The map also correlated quantitatively with APS‑1 severity in an international cohort and associated damaging variants with hypoparathyroidism and vitamin B12 deficiency anemia in UK Biobank. Conclusion:This proactive, calibrated AIRE variant effect map provides immediate functional evidence to improve missense variant classification and expedite APS‑1 diagnosis, while highlighting assay limitations (PHD1 blind spot, cDNA-based design) that warrant follow-up studies. Music:Enjoy the music based on this article at the end of the episode. Article title:Systematic and proactive evaluation of AIRE missense variant effects First author:Axakova A Journal:The American Journal of Human Genetics DOI:10.1016/j.ajhg.2026.07.008 Reference:Axakova A., Berger A.H., van Loggerenberg W., et al. Systematic and proactive evaluation of AIRE missense variant effects. The American Journal of Human Genetics 113, 1–21 (2026). https://doi.org/10.1016/j.ajhg.2026.07.008 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/s2-e438-aire-variant-effect-map QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-08-10. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Substantively audited the sections describing the AIRE variant-effect map, high-throughput mutagenesis and screening, structural-domain interpretation (CARD/SAND/PHD1/PHD2), gain-of-function findings, CAM-score genotype-phenotype correlations, and population-level associations (APS-1 cohort and UK Biobank). Also review- transcript topics: AIRE and APS-1 background; Insulin promoter GFP reporter assay in HEK293 cells; DT-POPCode library and missense variant generation; Variant effect map results and validation; Structural-domain mapping (CARD, SAND, PHD1, PHD2, C-terminal); Gain-of-function variants and disordered regions QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 7- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title-...

Hanson C et al., The American Journal of Human Genetics - Hanson et al. combine pooled multi-donor human neural progenitor cell "villages" with Townlet, a hierarchical Dirichlet regression model, to estimate donor-specific proliferation and treatment responses from Census-seq. They identify 16p11.2 deletion–associated NPC hyperproliferation and nominate common variants near ZFHX3 for proliferation and an ARNT2-linked locus for lead (Pb) sensitivity. Key terms: cell villages, Dirichlet regression, neural progenitor cells, 16p11.2 deletion, lead (Pb) sensitivity. Study Highlights:The authors developed and validated cell villages of 12–39 donor-derived NPC lines and Townlet, a Dirichlet regression framework, to analyze compositional time-series Census-seq data and estimate donor proliferation and treatment effects. Using this system they detected hyperproliferation of NPCs carrying the 16p11.2 deletion, mapped a common variant near ZFHX3 associated with proliferation, and identified ARNT2-linked variants associated with differential sensitivity to lead. Villages preserved donor-intrinsic growth rates while reducing technical variation, and Townlet outperformed standard models in simulations and empirical benchmarks. Conclusion:Pooled multi-donor NPC villages combined with the Townlet Dirichlet model provide a scalable, reproducible platform to map genetic and gene–environment effects on human cell fitness, nominating 16p11.2, ZFHX3, and ARNT2 as contributors to NPC proliferation and Pb sensitivity. Music:Enjoy the music based on this article at the end of the episode. Article title:Cell villages and Dirichlet modeling map human cell fitness genetics First author:Hanson C Journal:The American Journal of Human Genetics DOI:10.1016/j.ajhg.2026.07.005 Reference:Hanson C., Derebenskiy T., Rodriguez Vega A., et al. Cell villages and Dirichlet modeling map human cell fitness genetics. The American Journal of Human Genetics. 2026;113:1–21. doi:10.1016/j.ajhg.2026.07.005 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/cell-villages-dirichlet-modeling-human-cell-fitness QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-08-09. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript sections describing Townlet and cell villages, validation against array cultures, 16p11.2 deletion hyperproliferation, GWAS identifying ZFHX3-associated proliferation variants, and lead (Pb) resistance modifiers linked to ARNT2; also reviewed environmental exposome implications and limitations di- transcript topics: Cell villages concept and Townlet model; Census-seq and compositional data challenges; Village vs array validation and donor-intrinsic proliferation; 16p11.2 deletion NPC hyperproliferation in villages; GWAS in villages identifying ZFHX3 locus and rs34470044; Lead (Pb) exposure and ARNT2-associated Pb resistance QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims:...

Owino BO et al., PNAS - Using TurboID proximity proteomics and microscopy, researchers identify KIAP4 as the canonical member of a conserved Adhesion Related NTPase-like Domain (ARND) family that localizes to the Leishmania adhesion plaque. Deleting KIAP4 disrupts haptomonad adhesion in vitro and prevents colonization of the sand fly stomodeal valve without blocking metacyclogenesis. Key terms: Leishmania, adhesion, KIAP4, ARND family, sand fly. Study Highlights:TurboID::KIAP3 proximity labeling and mass spectrometry identified KIAP4 and multiple ARND family paralogs enriched at the adhered flagellum. KIAP4 colocalizes with KIAP3 at the adhesion plaque and accumulates during haptomonad differentiation. KIAP4 deletion severely reduces in vitro adhesion and abolishes stomodeal valve colonization in Lutzomyia longipalpis, while ARND paralogs are conserved across kinetoplastids and localize to adhered flagella in Trypanosoma congolense. Conclusion:KIAP4 is a foundational adhesion-plaque protein of a conserved ARND family required for Leishmania haptomonad adhesion and stomodeal valve colonization, making the family a potential target for transmission-blocking strategies. Music:Enjoy the music based on this article at the end of the episode. Article title:Identifcation of a conserved gene family with an essential role in Leishmania parasite–insect vector adhesion First author:Owino BO Journal:PNAS DOI:10.1073/pnas.2603653123 Reference:Owino BO, Sunter JD, et al. Identifcation of a conserved gene family with an essential role in Leishmania parasite–insect vector adhesion. Proc Natl Acad Sci U S A (PNAS). 2026;123(30):e2603653123. doi:10.1073/pnas.2603653123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/kiap4-arnd-leishmania-adhesion QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-08-08. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited sections cover: identification of KIAP4 as canonical ARND member; TurboID proximity-labeling workflow and enrichment results; KIAP4 localization to the adhesion plaque; KIAP4 deletion effects on in vitro adhesion and sand fly stomodeal valve colonization; ARND conservation across kinetoplastids; ARND domain arc- transcript topics: KIAP4 as canonical ARND member localizes to adhesion plaque; TurboID proximity labeling workflow and enriched protein cohort; Localization of ARND paralogs in Leishmania and Trypanosoma congolense; KIAP4 deletion phenotype: impaired adhesion and valve colonization; KIAP4 add-back rescues adhesion defects; ARND domain architecture and Walker A motif absence (inactive NTPase-like domains) QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 4- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- KIAP4 is the ca...

Ember M et al., PNAS - This episode examines a cryo-EM study of Escherichia coli tRNA-guanine transglycosylase (TGT) that solves the enzyme structure and its covalent intermediate with tRNATyr. Unexpectedly, the TGT homodimer can form covalent intermediates with two tRNAs simultaneously. The work maps peripheral RNA-binding residues required for activity and uses those insights to design higher-affinity dual-TAG RNA substrates for improved RNA-TAG labeling. Key terms: tRNA-guanine transglycosylase, cryo-EM, tRNA modification, RNA-TAG, Escherichia coli. Study Highlights:Using cryo-EM, the authors solved E. coli TGT and its covalent intermediate with tRNATyr and observed that the functional homodimer can form covalent intermediates with two tRNAs, displaying C2 symmetry. They identify peripheral residues (K285, K292, R320, Y35) and a dynamic loop (L98–I104) that stabilize the flipped anticodon loop and are required for covalent intermediate formation. Mutational analysis shows loss of activity for key substitutions, and structure-guided design of dual TAG32 hairpins yields markedly higher-affinity RNA substrates for RNA-TAG labeling. Biophysical assays estimate TAG3 KD ~3–5 µM versus dual TAG32 KD ~0.7–1 µM. Conclusion:The cryo-EM structures revise the canonical model of TGT function by demonstrating dual-substrate engagement and revealing peripheral binding determinants that enable both antibiotic-targeting strategies and improved, high-affinity RNA-labeling reagents. Music:Enjoy the music based on this article at the end of the episode. Article title:Cryo-EM reveals that Escherichia coli tRNA-transglycosylase can bind and act upon two tRNAs First author:Ember M Journal:PNAS DOI:10.1073/pnas.2601895123 Reference:Ember M. Rutha, Mariusz Matyszewski, Alexander Harjung, Jaehee Park, Caroline Knittel, Evan McCormack, and Neal K. Devaraja. Cryo-EM reveals that Escherichia coli tRNA-transglycosylase can bind and act upon two tRNAs. PNAS. 2026;123:e2601895123. doi:10.1073/pnas.2601895123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/ecoli-tgt-dual-trna-cryoem QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-08-07. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited sections describing (i) the cryo-EM structure of E. coli TGT and its covalent intermediates with tRNA, (ii) binding of two tRNAs and C2 symmetry, (iii) peripheral RNA-binding residues and their mutational analyses, (iv) the L98–I104 dynamic loop and A37 flipping, (v) Y35 involvement, (vi) R112 cross-monomer int- transcript topics: Cryo-EM structure of E. coli TGT and covalent intermediate; Dual tRNA binding and C2 symmetry; Peripheral RNA-binding residues outside active site (K285, K292, R320, Y35, R112); Dynamic loop L98–I104 and anticodon loop A37 flipping; Mutational analyses and effects on covalent intermediate formation; Structure-based design of dual TAG32 hairpins and KD measurements QC Summary:- factual score: 10/10- me...

Ishiya K et al., PNAS - This episode examines a PNAS study that reports two high-coverage ancient human genomes from mainland Japan (an Initial Jomon >67× and a Middle Yayoi >46×). The genomes enable diploid genotyping, demographic reconstructions, ancestry modeling, and AMY1 copy-number analysis that reshape understanding of Jomon and Yayoi histories. Key terms: ancient DNA, Jomon, Yayoi, AMY1, population history. Study Highlights:The authors sequenced two low-contamination, high-coverage genomes from mainland Japan (IY1, Initial Jomon; DO, Middle Yayoi) enabling diploid analyses and CNV inference. Demographic reconstructions show divergent post-LGM trajectories: long-term stability with no expansion in the Jomon lineage and gradual sustained growth in the Yayoi-related ancestral population. Admixture and f-statistics indicate substantial continental Northeast Asian ancestry in the Yayoi individual and genetic continuity between the Yayoi and present-day mainland Japanese. High AMY1 copy numbers (~9–10) in both individuals suggest starch-relevant variation existed before large-scale rice farming. Conclusion:High-coverage ancient genomes from mainland Japan reveal contrasting population histories for Jomon and Yayoi lineages and show that elevated AMY1 copy-number variation relevant to starch consumption predates intensive rice agriculture, refining models of Japanese population formation. Music:Enjoy the music based on this article at the end of the episode. Article title:High-coverage ancient genomes reveal divergent population histories and prehistoric starch-related genetic variation in Japan First author:Ishiya K Journal:PNAS DOI:10.1073/pnas.2606162123 Reference:Ishiya K., Mizuno F., Gojobori J., Kumagai M., et al. High-coverage ancient genomes reveal divergent population histories and prehistoric starch-related genetic variation in Japan. Proc Natl Acad Sci U S A. 2026;123(30):e2606162123. doi:10.1073/pnas.2606162123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/high-coverage-ancient-genomes-japan QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-08-06. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript sections describing (1) sampling of two high-coverage genomes (IY1 and DO), (2) authenticity checks and sequencing depth, (3) demographic inferences (PSMC/SMC++), (4) AMY1 copy-number findings, (5) ancestry and admixture contexts, (6) admixture timing, and (7) the dual-structure model; excluded n- transcript topics: Two high-coverage mainland Japan genomes (IY1 Jomon, DO Yayoi); Petrous bone sampling and ancient DNA authentication; PSMC/SMC++ demographic inferences post-LGM; AMY1 copy-number variation and starch-diet adaptation; Ancestry and continental admixture in Yayoi vs Jomon; Admixture timing via LD decay and related methods QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 5- claims flagged for review: 0<...

Wu G et al., Proceedings of the National Academy of Sciences - This episode examines a PNAS study that identifies site-specific lactylation of HSP90α as a metabolic signal linking glycolysis to mitochondrial biogenesis in ovarian cells. Lactylation at K58 and K616 modulates HSP90α phosphorylation, enabling nuclear import of PGC1α and LRPGC1, boosting mitochondrial number, cholesterol import, estradiol synthesis, and follicle growth; CREBBP, ACSS2 and GTPSCS participate in the lactylation pathway. Key terms: HSP90α, lactylation, PGC1α, mitochondrial biogenesis, estradiol. Study Highlights:The authors show that sodium lactate promotes HSP90α lactylation at K58 and K616 via CREBBP and lactyl-CoA synthesis (ACSS2/GTPSCS). K58 lactylation enhances ULK1 recruitment and S39 phosphorylation while K616 lactylation blocks CDK5-mediated S596 phosphorylation, together enabling HSP90α to chaperone PGC1α and LRPGC1 into the nucleus. Nuclear PGC1α/LRPGC1 activate NRF1/2 targets (Tfb1m, Tfb2m, Tfam) to drive mitochondrial biogenesis, increase mitochondrial cholesterol import and raise estradiol production, with in vivo lactate raising ovarian mtDNA, TOM20, estradiol and antral follicle number. Conclusion:Site-specific lactylation of HSP90α integrates glycolytic flux with chaperone and phosphorylation control to promote PGC1α/LRPGC1 nuclear import, mitochondrial biogenesis and steroidogenic output in ovarian cells, revealing a metabolite-dependent regulatory axis with potential implications for ovarian function and fertility. Music:Enjoy the music based on this article at the end of the episode. Article title:HSP90α lactylation orchestrates PGC1α and LRPGC1 nuclear translocation driving mitochondrial biogenesis First author:Wu G Journal:Proceedings of the National Academy of Sciences DOI:10.1073/pnas.2528979123 Reference:Wu G., Li H., He T., et al. HSP90α lactylation orchestrates PGC1α and LRPGC1 nuclear translocation driving mitochondrial biogenesis. PNAS. 2026;123(30):e2528979123. doi:10.1073/pnas.2528979123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/hsp90a-lactylation-mito-biogenesis QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-23. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the main mechanistic narrative from lactate signaling to HSP90α lactylation, ULK1/CDK5-regulated phosphorylation, nuclear import of PGC1α/LRPGC1, NRF1/2-driven transcription, mitochondrial biogenesis, cholesterol import, and in vivo hormonal/follicle outcomes.- transcript topics: Lactate as signaling molecule and lactylation concept; HSP90α lactylation at K58 and K616; CREBBP as the lactyltransferase and lactyl-CoA synthesis pathway; ULK1 and CDK5 regulation of S39 and S596 phosphorylation; HSP90α-mediated nuclear import of PGC1α and LRPGC1; NRF1/NRF2 target gene activation (TFB1M, TFB2M, Tfam) and mitochondrial biogenesis QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claim...

Mukhamedova L et al., Proceedings of the National Academy of Sciences - Using cryo-electron tomography and single-particle cryo-EM of infected Cos-7 cells, the authors show that echovirus 18 (E18) releases its RNA in vivo by capsid opening with loss of one to three pentamers. Binding to the neonatal Fc receptor (FcRn) expels VP1 pocket factors and primes particles for uncoating. Activated intermediates were not detected in cells, indicating rapid genome release. Key terms: echovirus 18, enterovirus, genome release, capsid opening, FcRn. Study Highlights:Cryo-EM/ET of infected cells resolved genome-containing E18 particles to 4.3 Å and imaged empty and open capsids in situ. Binding of E18 to FcRn induces partial expulsion of VP1 pocket factors, consistent with receptor- triggered priming. Empty capsids observed inside cells lack one to three pentamers of capsid proteins, providing direct evidence of capsid opening as the genome release mechanism. Activated particles were not detected in cells, implying these intermediates are short- lived and genome release is rapid. Conclusion:Capsid opening is the physiological uncoating mechanism of echovirus 18 in infected cells: receptor (FcRn) binding expels pocket factors and primes particles, and genome release occurs rapidly via loss of one to several pentamers with empty, incomplete capsids observed in situ. Music:Enjoy the music based on this article at the end of the episode. Article title:Particles of echovirus 18 open to release their genomes in vivo First author:Mukhamedova L Journal:Proceedings of the National Academy of Sciences DOI:10.1073/pnas.2601182123 Reference:Mukhamedova L., Buchta D., Hrebík D., et al. Particles of echovirus 18 open to release their genomes in vivo. PNAS. 2026;123(30):e2601182123. https://doi.org/10.1073/pnas.2601182123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/echovirus-18-capsid-opening-432 QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-23. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript sections describing E18 structure, FcRn binding and pocket-factor expulsion, endosomal acidification and detachment, in vivo evidence of empty/open capsids, and the genome release mechanism.- transcript topics: Echovirus 18 capsid structure and pocket factor; FcRn receptor binding and pocket-factor expulsion; Endocytosis and endosomal acidification as uncoating trigger; In vivo evidence: genome-containing particles lack pocket factors; Capsid opening with loss of one to three pentamers; Endosome rupture and cytoplasmic delivery of RNA QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 5- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- In vivo, echovirus 18 genome release...

Owino BO et al., Proceedings of the National Academy of Sciences - TurboID proximity labeling and proteomics identify KIAP4 as the canonical member of a conserved Adhesion Related NTPase-like Domain (ARND) family that localizes to the Leishmania adhesion plaque. KIAP4 deletion disrupts haptomonad adhesion and prevents stomodeal valve colonization in sand flies. Key terms: Leishmania, adhesion, KIAP4, ARND family, vector colonization. Study Highlights:Using TurboID-tagged KIAP3 and mass spectrometry, the authors identified KIAP4 and multiple ARND family paralogs enriched at the adhered flagellum. KIAP4 localizes to the adhesion plaque alongside KIAP3 and accumulates during haptomonad differentiation. KIAP4 deletion severely reduces in vitro adhesion and abolishes stomodeal valve colonization in Lutzomyia longipalpis, while ARND paralogs are conserved and localize to adhered flagella in Trypanosoma congolense. Phylogenetic analysis shows ancient duplications and lineage-specific expansions of the ARND family across kinetoplastids. Conclusion:KIAP4 is a foundational adhesion-plaque protein and founding member of a conserved ARND family required for Leishmania haptomonad adhesion and sand fly stomodeal valve colonization, making ARND proteins candidate targets for transmission-blocking strategies. Music:Enjoy the music based on this article at the end of the episode. Article title:Identification of a conserved gene family with an essential role inLeishmaniaparasite–insect vector adhesion First author:Owino BO Journal:Proceedings of the National Academy of Sciences DOI:10.1073/pnas.2603653123 Reference:Owino BO, Yanase R, Pruzinovac K, Farr H, Lopez Y, Marron AO, Vaughan S, Volf P, Sunter JD. Identification of a conserved gene family with an essential role in Leishmania parasite–insect vector adhesion. Proc Natl Acad Sci U S A. 2026;123(30):e2603653123. doi:10.1073/pnas.2603653123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/kiap4-arnd-leishmania-adhesion QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-23. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited spoken sections covering (1) identification of KIAP4 as the canonical ARND member and its adhesion-plaque localization, (2) TurboID proximity labeling methodology and protein enrichment results, (3) KIAP4 functional analyses including in vitro adhesion and in vivo valve colonization, (4) ARND conservation acros- transcript topics: KIAP4 and ARND identification in Leishmania; TurboID proximity labeling workflow and enrichment of adhesion-plaque components; Localization of KIAP4 and KIAP3 within the adhesion plaque; KIAP4 knockout effects on haptomonad adhesion and sand fly stomodeal valve colonization; ARND conservation across kinetoplastids (Trypanosoma congolense; T. brucei cross-species data); Inactive Walker A motif in ARND proteins (NTPase-like domains) QC Summary:- factual score: 10/10- metadata score: 1...

Sandin MM et al., Proceedings of the National Academy of Sciences - Molecular clocks and diversification models applied to a 75,975-OTU rDNA dataset, including long-read environmental sequences and 77 fossil calibrations, indicate crown-group eukaryotes diversified steadily from the mid‑Proterozoic with Archaeplastida dominating early diversity. Key terms: eukaryote evolution, Proterozoic diversification, Archaeplastida, molecular clock, environmental sequencing. Study Highlights:The study assembled 75,975 nonredundant rDNA OTUs combining long-read environmental metabarcoding and reference sequences and calibrated 32 timetrees with 77 fossil constraints. Molecular dating places LECA at ~1775 Ma and finds most eukaryotic supergroups originating across the Mesoproterozoic. Diversification analyses (ClaDS, BAMM) show steady accumulation of crown-group diversity through the Proterozoic, with Archaeplastida exhibiting an early rapid diversification likely tied to plastid endosymbiosis. Results suggest crown eukaryotes were ecologically and taxonomically diverse long before clear crown-group fossils appear. Conclusion:Integrating extensive environmental sequencing with molecular dating and diversification models reveals that crown-group eukaryotes were diversifying steadily from the mid‑Proterozoic, overturning the notion of a biologically stagnant “boring billion” and indicating early ecological interactions and endosymbioses drove diversification. Music:Enjoy the music based on this article at the end of the episode. Article title:Environmental phylogenetics supports a steady diversification of crown eukaryotes starting from the mid-Proterozoic First author:Sandin MM Journal:Proceedings of the National Academy of Sciences DOI:10.1073/pnas.2600283123 Reference:Sandin MM, Burki F, Cohen PA, Morlond H (2026) Environmental phylogenetics supports a steady diversification of crown eukaryotes starting from the mid-Proterozoic. PNAS 123(29):e2600283123. doi:10.1073/pnas.2600283123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/environmental-phylogenetics-steady-diversification-crown-eukaryotes QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-23. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited transcript segments covering LECA dating and molecular clock; environmental sequencing (OTUs and 18S-28S rDNA); Archaeplastida endosymbiosis and early diversification; Proterozoic diversification dynamics and the 'boring billion' reinterpretation; predator–prey dynamics and fossil evidence; and limitations/samp- transcript topics: LECA dating and molecular clock; Environmental metabarcoding and OTU dataset (75,975 OTUs); Archaeplastida diversification and plastid endosymbiosis; Proterozoic diversification vs. 'boring billion' narrative; Predation, defense, and ecosystem dynamics (fossil evidence); Sampling limitations and diversification modeling (ClaDS, BAMM) QC Summary:- factual score: 10/10- met...

Barna LS et al., Human Genetics and Genomics Advances - We summarize a psychometric validation of the EAGL measure using US adult online samples. The study produced a validated 17-item EAGL-short that captures three core genetic literacy constructs and can be used to assess and target genetic communication and education. Key terms: genetic literacy, EAGL, psychometrics, knowledge comprehension, autism. Study Highlights:The authors administered the EAGL across three online US samples (combined N ≈ 2,708) and used exploratory and confirmatory factor analyses to refine the instrument. The final EAGL-short contains 17 items loading on three factors: subjective knowledge, knowledge comprehension, and conceptual (objective) knowledge, with CFA fit indices showing excellent model fit (CFI = 0.996, RMSEA = 0.031, SRMR = 0.080). Regression analyses found numeracy to be the strongest predictor across subscales, a personal connection to autism raised subjective familiarity but not comprehension or conceptual knowledge, and metropolitan vs non-metropolitan status showed no main effects. An interaction between education and connection to autism was observed for knowledge comprehension, highlighting education as a moderator. Conclusion:The EAGL-short is a psychometrically sound, 17-item tool that measures subjective knowledge, knowledge comprehension, and conceptual genetic knowledge in US adults; it enables more precise assessment of genetic literacy and the design of targeted educational interventions, though further validation in other languages and settings is recommended. Music:Enjoy the music based on this article at the end of the episode. Article title:Psychometric validation of the education and assessment of genetic literacy or the EAGL measure First author:Barna LS Journal:Human Genetics and Genomics Advances DOI:10.1016/j.xhgg.2026.100651 Reference:Barna LS, Liao Y, Wierzbicki MR, Ramírez-Renta GM, Kaphingst KA, Gunter C. Psychometric validation of the education and assessment of genetic literacy or the EAGL measure. Human Genetics and Genomics Advances. 2026;7:100651. doi:10.1016/j.xhgg.2026.100651. License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/eagl-psychometric-validation QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-23. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Substantive auditing covered the EAGL-short validation narrative, the three constructs, the autism infographic comprehension exercise, numeracy as predictor, autism connection effects, geography/metropolitan status findings, and the education-autism interaction implications as presented in the transcript.- transcript topics: EAGL-short three-factor structure; Autism infographic used for knowledge comprehension; Numeracy as predictor of genetic literacy; Autism connection influencing subjective knowledge; Geography/metro status effects on literacy; Education by autism interaction affecting knowledge comprehension QC Summary:

Ait Oumelloul M et al., Human Genetics and Genomics Advances - Untargeted plasma metabolomics (1,930 features) in 1,244 participants of the Swiss HIV Cohort Study were paired with genome-wide genotypes to map genetic influences on metabolite levels, test colocalization with eQTLs, and apply Mendelian randomization to probe causal links with aging-related biomarkers and diseases. Key terms: HIV, metabolomics, GWAS, Mendelian randomization, NAT8. Study Highlights:The study performed GWAS on 1,930 putative plasma metabolites measured by untargeted mass spectrometry in 1,244 people with HIV and identified 27 metabolites associated with 12 genetic loci, including NAT8, FUT2, PYROXD2, and FADS. Colocalization analyses found that 24 of the 27 metabolite loci overlapped with tissue eQTLs, linking genetic variants to gene expression and metabolite variation. Mendelian randomization using MR-link-2 provided evidence for putative causal relationships, notably genetically higher N-acetylcitrulline associated with lower serum creatinine (protective for kidney function) and chorismate linked to higher cholesterol and triglycerides. Sensitivity analyses across ancestries and sex and partial replication in non-HIV data supported the robustness of key signals. Conclusion:Integrating untargeted metabolomics with GWAS, eQTL colocalization, and MR in people with HIV revealed host genetic regulation of plasma metabolites, identified colocalized expression signals, and suggested causal links between specific metabolites and kidney and lipid biomarkers, highlighting targets for follow-up and the utility of multi-omics for precision comorbidity research in this population. Music:Enjoy the music based on this article at the end of the episode. Article title:Genome-wide association study of untargeted plasma metabolomic profiles identifies host genetic regulation in people with HIV First author:Ait Oumelloul M Journal:Human Genetics and Genomics Advances DOI:10.1016/j.xhgg.2026.100635 Reference:Ait Oumelloul M, van der Graaf A, Tang S, Thorball CW, Labarile M, Saadat A, Timonina V, Schöpf IC, Wandeler G, Nemeth J, Cavassini M, Calmy A, Schmid P, Stöckle M, Elzi L, Zamboni N, Kouyos RD, Tarr PE, Fellay J; Swiss HIV Cohort Study. Genome-wide association study of untargeted plasma metabolomic profiles identifies host genetic regulation in people with HIV. Human Genetics and Genomics Advances. 2026;7:100635. https://doi.org/10.1016/j.xhgg.2026.100635 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/genetic-metabolomics-hiv-428 QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-23. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited portions include study design and population, untargeted metabolomics, GWAS of metabolites, eQTL colocalization, Mendelian randomization analyses, and key metabolite–gene–disease links (NAT8/N-acetylcitrulline, chorismate, F11/5-HTP), along with limitations and clinical implications discussed in the transcrip...

Simpson RC et al., Trends in Genetics - This forum reviews evidence that host genetic variants associated with metabolic disease often overlap with loci that shape gut microbiome composition and function. Examples include LCT/MCM6 linking Bifidobacterium to reduced T2D risk, defensin locus variants affecting DEFA26 and Akkermansia abundance, and rs7133214 associating with HbA1c. The authors outline mechanisms, analytic tools, and experimental strategies to resolve causality and call for centralized microbiome–genetic resources. Key terms: gut microbiome, genetics, type 2 diabetes, defensins, bile acids. Study Highlights:The authors compile microbial GWAS loci and perform phenome-wide scans using the Synteny tool, revealing significant overlaps between microbe-associated SNPs and metabolic traits including obesity, HDL, blood glucose, and T2D. Case studies highlight loci such as LCT/MCM6, defensin genes (DEFA26–Akkermansia), and rs7133214 (methionine pathway) as examples of microbiome-mediated effects. Mechanisms likely include immune-mediated (Paneth cell defensins, NOD2, FUT2) and substrate/metabolite-mediated (lactose metabolism, bile acids, polyamines) pathways. The paper advocates integrated multi-omic studies, Mendelian randomisation, and human–mouse syntenic mapping, and emphasizes the need for a centralized database to enable causal inference. Conclusion:Host genetic control of the gut microbiome is widespread and may mediate many genetic links to metabolic disease; resolving causality will require integrated multi-omic datasets, improved causal-mapping tools, standardized databases, and complementary human and controlled mouse studies. Music:Enjoy the music based on this article at the end of the episode. Article title:The gut microbiome as an effector of metabolic disease gene variants First author:Simpson RC Journal:Trends in Genetics DOI:10.1016/j.tig.2026.03.011 Reference:Simpson RC, Cutler HB, James DE, Masson SWC. The gut microbiome as an effector of metabolic disease gene variants. Trends in Genetics. 2026;42(7):585-588. https://doi.org/10.1016/j.tig.2026.03.011 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/genes-gut-microbiome-metabolic-variants QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-23. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Substantively audited portions covering: (1) host genetic regulation of the gut microbiome and immune barrier, (2) specific gene–microbiome examples (LCT/MCM6, defensin locus, TCF7L2), (3) methodological approach (Synteny, CNV/MR concepts), (4) overlaps between microbial SNPs and human metabolic traits (HbA1c, HDL, obe- transcript topics: Gut microbiome as metabolic organ governed by host genetics; Lactase persistence (LCT/MCM6) and T2D risk via microbial metabolism; Defensin locus variants and Akkermansia muciniphila in mice; TCF7L2's role in Paneth cell development and dysbiosis; Synteny tool, microbial GWAS, and Mendelian randomisation conce...

Guo K et al., Cell Genomics - ProtoCloud is a self-explaining deep generative model that embeds single cells around cell-type-specific prototypes to deliver accurate, uncertainty-aware cell type annotation and gene-level explanations from raw UMI counts. Key terms: single-cell, explainable AI, prototypical models, cell type annotation, uncertainty estimation. Study Highlights:ProtoCloud achieves accurate and efficient annotation of single-cell data, including improved detection of rare cell types, by organizing embeddings around learned prototypes. A disentangled latent space separates biological identity from batch and nuisance variation, improving robustness and label transfer. Built-in uncertainty quantification based on cell–prototype similarity identifies and enables correction of misannotations. Prototypical relevance propagation backpropagates similarity to highlight genes driving classification for instant gene‑level explainability. Conclusion:By combining a decomposed VAE, learnable prototypes, PRP-based gene relevance, and calibrated similarity-based uncertainty, ProtoCloud provides accurate, interpretable, and robust single-cell annotations that detect rare states, correct label errors, and nominate marker genes to support atlas construction and disease studies. Music:Enjoy the music based on this article at the end of the episode. Article title:ProtoCloud: A prototypical self-explaining model for single-cell analysis First author:Guo K Journal:Cell Genomics DOI:10.1016/j.xgen.2026.101217 Reference:Guo K. & Ding J. ProtoCloud: A prototypical self-explaining model for single-cell analysis. Cell Genomics 6, 101217 (2026). doi:10.1016/j.xgen.2026.101217 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/protocloud-prototypical-self-explaining-single-cell QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-23. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript segments describing ProtoCloud architecture, training, uncertainty quantification, and key biological validations (PBMC, RGC time course, EoE).- transcript topics: ProtoCloud architecture and prototypes; Disentangled latent space with z1 and z2; Prototypical relevance propagation (PRP) and HRGs; Robustness to label noise (20% perturbation); PBMC30K annotation corrections (NKG7 example); Time-course retinal ganglion cells after optic nerve crush QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 7- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- ProtoCloud uses six prototypes per cell type by default- Latent space is partitioned into two components: z1 for cell-type identity and z2 for batch/noise factors- PRP identifies gene-level relevance and HRGs (e.g., CD79B, LY9)...

Staklinski SJ et al., Cell Genomics 6, 101193 (2026) - This episode explores BEAM, a Bayesian framework built on BEAST 2 that jointly infers cell-lineage phylogenies and tissue-migration graphs from CRISPR-based lineage-tracing data. The method quantifies uncertainty, improves reconstruction versus parsimony-based approaches, and supports Bayes-factor hypothesis testing of migration models. Applications to simulated data and mouse lung and prostate datasets reveal complex migration patterns and highlight limits imposed by sparse mutational signal. Key terms: Bayesian inference, metastasis, lineage tracing, phylogenetics, BEAM. Study Highlights:BEAM jointly samples lineage trees and tissue-migration histories, producing posterior distributions over migration graphs and timing. In simulations BEAM outperforms existing parsimony-based methods across a range of mutation and migration regimes and is robust to missing barcode data. Applied to mouse lung and prostate datasets, BEAM uncovers complex, heterogeneous migration patterns and provides conservative estimates of metastasis-to-metastasis and primary-reseeding events. The framework also implements Bayes-factor tests to assess dataset informativeness and to compare competing migration models. Conclusion:BEAM provides a fully Bayesian approach that integrates lineage-tree and migration-graph inference, quantifies uncertainty, and enables formal hypothesis testing; it improves accuracy in many simulated regimes and reveals richer metastatic histories in real datasets, while its utility is constrained by sparse mutational information and current scalability limits. Music:Enjoy the music based on this article at the end of the episode. Article title:Bayesian inference of tissue-migration histories in metastatic cancer from cell-lineage tracing data First author:Staklinski SJ Journal:Cell Genomics 6, 101193 (2026) DOI:10.1016/j.xgen.2026.101193 Reference:Staklinski SJ, Scheben A, Brault LM, Hassett R, Serio RN, Xing J, Nowak DG, Siepel A. Bayesian inference of tissue-migration histories in metastatic cancer from cell-lineage tracing data. Cell Genomics. 2026;6:101193. doi:10.1016/j.xgen.2026.101193 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/beam-bayesian-inference-metastasis QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-23. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript's substantive claims about BEAM's methodology, benchmarking against parsimony methods, simulated performance, real-data findings (lung and prostate), Bayes-factor testing, and limitations/future directions; compared against the canonical article text.- transcript topics: BEAM Bayesian joint inference on BEAST 2; Two-step parsimony methods and their limitations; Simulation benchmarks and edgewise performance; Real-data analyses: lung cancer migration histories; Prostate cancer migration histories and data informativeness; Bayesian hypothesis testing and Bayes fac... Chapters (00:00:02) - Papercast: The Science of Genomics(00:00:29) - How does cancer spread? The '(00:05:55) - Bayesian Analysis of Cancer metastasis(00:10:55) - Beme the Better Way to Map Prostate Cancer?(00:15:16) - Beme the computational lung cancer model

Cox RM et al., Cell Genomics 6, 101254 - Cox et al. reconstruct a conserved protein interaction network for the last eukaryotic common ancestor using >26,000 mass spectrometry experiments across 31 species and demonstrate how the ancient interactome predicts and explains modern human disease mechanisms. Key terms: LECA, protein interactome, co-fractionation mass spectrometry, ciliopathy, V-ATPase. Study Highlights:The authors inferred a core LECA gene set and integrated ∼26,000 mass spectrometry experiments from 31 eukaryotes to reconstruct a conserved interactome of 109,466 pairwise interactions among 3,193 orthogroups. The map recovers known complexes (e.g., ARP2/3, TRAPP, V-ATPase, HOPS/CORVET) and reveals unexpected ancient interactions and lineage-specific losses. Network propagation on this interactome predicted novel gene-disease links validated experimentally: EFHC2 mislocalization linked to ciliopathic renal failure, ATP6V1A implicated in osteopetrosis with corresponding increased bone density in mouse knockouts, and GLG1 disruption impairing IFT and ciliation relevant to SRTD. The dataset supports a complex LECA capable of cell projection machinery and provides a framework for linking deep conservation to medical phenotypes. Conclusion:An experimentally reconstructed LECA interactome defines deeply conserved macromolecular assemblies that have persisted for nearly two billion years and can predict modern disease mechanisms, as shown by validated links to ciliopathies, osteopetrosis, and short-rib thoracic dysplasia. Music:Enjoy the music based on this article at the end of the episode. Article title:A protein interactome for the last eukaryotic common ancestor illuminates the biochemical basis of modern genetic diseases First author:Cox RM Journal:Cell Genomics 6, 101254 DOI:10.1016/j.xgen.2026.101254 Reference:Cox RM, Papoulas O, Shril S, et al. A protein interactome for the last eukaryotic common ancestor illuminates the biochemical basis of modern genetic diseases. Cell Genomics. 2026;6:101254. https://doi.org/10.1016/j.xgen.2026.101254 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/leca-interactome-modern-disease QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-23. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Substantively audited transcript sections: LECA concept and health relevance; CFMS data integration across 31 species; conserved vesicle tethering complexes and actin cytoskeleton in LECA; primordial origins of cell projection/phagocytosis; EFHC2 ciliopathy mechanism; ATP6V1A osteopetrosis; GLG1 in ciliogenesis and SRT- transcript topics: LECA concept and health relevance; CFMS data integration across 31 species; Conserved vesicle tethering complexes (TRAPP, GARP/COG, HOPS); Actin cytoskeleton and ARP2/3 in LECA; Primordial origins of cell projection and phagocytosis; EFHC2 ciliary mechanism in renal disease QC Summary:- factual score: 10/10- metadata score:... Chapters (00:00:20) - Papercast: Dating the genetics of humans(00:01:29) - Machine-learning maps the interactions of a billion year old cell(00:04:44) - Could the LECA Intersectome Identify Human Diseases?

Aguirre M et al., Cell Genomics - Aguirre et al. use simulated gene regulatory networks and a linear structural equation model to show how sparsity, modularity, and hub regulators shape the genome-wide distribution of cis- and trans-heritability of gene expression. Their results indicate gene expression is less polygenic but more pleiotropic than previously thought. Key terms: gene regulatory networks, trans-eQTL, cis-heritability, modularity, hub regulators. Study Highlights:The authors model local motifs, modular group structure, and global hub regulators to study their effects on cis- and trans-acting genetic variance. They show that sparsity, modularity, and hub-like out-degree distributions together best reproduce the observed distribution of cis-heritability in human whole-blood data. Hub regulators shorten network paths and concentrate trans-acting variance at pleiotropic loci. Local motifs mediate much of the effect of modular groups on trans-heritability. Conclusion:Network topology constrains the genetic architecture of gene expression: realistic GRNs are sparse, modular, and hub-rich, leading to fewer regulators per gene but more repeated use of the same regulators across genes. These findings suggest model and inference biases toward sparse, modular, hub-containing networks and support aggregation strategies to improve trans-eQTL discovery. Music:Enjoy the music based on this article at the end of the episode. Article title:Regulatory network topology and the genetic architecture of gene expression First author:Aguirre M Journal:Cell Genomics DOI:10.1016/j.xgen.2026.101219 Reference:Aguirre M, Spence JP, Sella G, Pritchard JK. Regulatory network topology and the genetic architecture of gene expression. Cell Genomics. 2026;6:101219. doi:10.1016/j.xgen.2026.101219. License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/grn-topology-genetic-architecture QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-22. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Substantively audited sections covering cis- and trans-heritability, the two-part GRN modeling (graph-generating model + SEM), motifs and hubs, modular structure, and limitations of the approach.- transcript topics: cis- and trans-eQTLs and their effect sizes; twin-study heritability and cis/trans fractions; graph-based GRN generation: planted partition model (PPM) and modularity; linear structural equation modeling (SEM) of gene expression; hub regulators and heavy-tailed out-degree distributions; network motifs: triangle and diamond (bi-parallel) motifs QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 6- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- cis-eQTL median effect size = 0.14; trans-eQTL median e... Chapters (00:00:20) - Understanding the genetic architecture of gene expression(00:02:29) - The hidden genetics of genomics(00:08:34) - The Hidden Networks of Human Biology(00:14:21) - Do regulatory hubs make the human genome fragile?(00:15:54) - Genomic Networks: Less Polygenic, More Pleiotropic(00:22:23) - A network of signals in the dark

Rodriguez-Algarra F et al., Cell Genomics - This episode examines a large-scale analysis of germline ribosomal DNA (rDNA) variation in ~500,000 UK Biobank genomes that identifies high-confidence rDNA SNVs and indels associating with human complex traits, notably a cluster in the 28S expansion segment ES15L linked to body-size measures. Key terms: ribosomal DNA, rRNA variants, UK Biobank, ES15L expansion segment, complex traits. Study Highlights:The authors derived a stringent set of 378 rDNA variants from UK Biobank whole-genome sequencing and tested intragenomic variant frequencies (IGFs) for association with 419 traits. They report 34 associations at global FDR < 0.01 concentrated in the 28S, with a cluster in ES15L associating with height, weight, and related measures. ES15L variant combinations are predicted to alter rRNA secondary structure and are expressed and incorporated into actively translating ribosomes. rDNA copy number and sequence variation influence overlapping traits but act independently. Conclusion:Germline sequence variation within human rDNA is a reproducible and trait-relevant source of genetic variation, with species-specific ES15L variants likely altering rRNA structure and ribosome composition and contributing to variation in body-size and other complex traits. Music:Enjoy the music based on this article at the end of the episode. Article title:Germline sequence variation within the ribosomal DNA is associated with human complex traits First author:Rodriguez-Algarra F Journal:Cell Genomics DOI:10.1016/j.xgen.2026.101213 Reference:Rodriguez-Algarra F., Whittaker E., Cooper M., et al. Germline sequence variation within the ribosomal DNA is associated with human complex traits. Cell Genomics. 2026;6:101213. https://doi.org/10.1016/j.xgen.2026.101213 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/germline-rdna-variants-human-traits-ep422 QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-22. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript for core scientific claims about ES15L rDNA variants: their clustering and trait associations, mechanistic interpretation (RNA structure, translation), evolutionary specificity, and independence from copy number, as presented in the article.- transcript topics: ES15L expansion segment 15L variants in the 28S subunit; Association of ES15L variants with body-size traits (height, weight, birth weight, waist circumference); Evolutionary and primate comparison of ES15L haplotypes; Polysome-seq evidence for ES15L variant expression and incorporation into translating ribosomes; RNA secondary structure modeling of ES15L variants; Independence of ES15L variant effects from total rDNA copy number QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 7- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:-... Chapters (00:00:20) - How the genetic variation of the human genome is surprising(00:06:00) - The Hidden DNA fingerprint of humans(00:11:56) - How can ES15L variants affect human genetics?

Schaff DL et al., Cell Genomics - Schaff et al. use multi-treatment clonal tracing combined with single-cell RNA-seq to show that rare, pre-existing transcriptional states in melanoma predict resistance to diverse therapies and that high CD44 marks cells with multi-treatment tolerance. Key terms: melanoma, CD44, clonal tracing, scRNA-seq, drug resistance. Study Highlights:Using high-throughput lentiviral barcoding across six distinct treatments, the authors show that rare melanoma clones can develop resistance to multiple unrelated therapies. Clonal resistance is heritable over roughly six doublings and top resistant clones overlap across treatment pairs. High pre-treatment CD44 expression marks cells that are more likely to resist dabrafenib, trametinib, and hypoxia-mimetic stress, and CD44-high cells show elevated lysosomal activity. Pre-treatment transcriptional programs map to divergent resistant end states, revealing multiple paths to resistance. Conclusion:Pre-existing, heritable transcriptional cell states—including a CD44-high program with elevated lysosomal activity—can predict and underlie multi-treatment resistance in melanoma, and mapping these states can expose distinct routes to treatment failure. Music:Enjoy the music based on this article at the end of the episode. Article title:Pre-existing cell states predict resistance to multiple treatments First author:Schaff DL Journal:Cell Genomics DOI:10.1016/j.xgen.2026.101191 Reference:Schaff DL, White PE, Cote CJ, et al. Pre-existing cell states predict resistance to multiple treatments. Cell Genomics. 2026;6:101191. doi:10.1016/j.xgen.2026.101191 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/pre-existing-cell-states-predict-resistance QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-22. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the core narrative on six-treatment clonal resistance, CD44/FN1 markers, lysosomal mechanism, and CNMF/cNMF-based mapping from pre-treatment states to resistance end-states, plus validation and limitations described in the transcript.- transcript topics: Six-treatment panel design and outcomes in WM989 melanoma cells; Barcoding and clonal tracing methodology; Pre-treatment gene expression states as predictors of resistance; CD44 and FN1 as markers of multi-treatment resistance; lysosomal sequestration mechanism; CNMF/cNMF analysis linking initial states to resistant end states; Differentiated vs mesenchymal initial states and divergent resistance pathways QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 6- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- Six-treatment panel including two targeted inhibitors (dabrafenib, trametinib), two stressors (CoCl2, acid... Chapters (00:00:20) - What Really Happens to Cancer Resistance?(00:06:15) - The melanoma'specialists'(00:12:37) - Melanoma cell survival: Multiple paths to survival(00:19:04) - Black Skin Cancer: The blueprint for its generalist resistance(00:21:38) - Oh It's Built Before the Battle

Real TD et al., Cell Genomics - This episode examines a long-read sequencing study that resolves the complex NOTCH2NL segmental duplications on human chromosome 1, traces independent duplications in apes, documents gene conversion and structural variation across human haplotypes, and maps paralog-specific regulatory elements using Fiber-seq and long-read transcriptomics in brain organoids. Key terms: NOTCH2NL, segmental duplications, gene conversion, chromatin accessibility, brain organoids. Study Highlights:Using 82 long-read assemblies from humans and apes, the authors show independent NOTCH2NL duplications among great apes with protein-coding human copies emerging ~2.2–3.7 mya. Analysis of 69 validated human haplotypes defines 11 structural configurations, reveals frequent interlocus gene conversion and a new paralog (NOTCH2tv), and finds NOTCH2NLA present in all haplotypes. Fiber-seq and long-read Iso-Seq in dorsal forebrain organoids identify paralog-specific accessible chromatin elements correlated with differential transcript abundance, with NOTCH2 and NOTCH2NLA harboring the most unique regulatory sites. Functional assays indicate NOTCH2tv and NOTCH2NLR produce unstable proteins, while NOTCH2NLB yields a stable product in HEK293 tests. Conclusion:NOTCH2NL loci underwent dynamic duplication, conversion, and regulatory divergence during ape and human evolution; paralog-specific regulatory elements and structural variation likely shaped expression differences while also increasing genomic instability associated with 1q21.1 copy-number disorders. Long-read genomic and epigenomic approaches are essential to resolve these complex regions and their functional implications. Music:Enjoy the music based on this article at the end of the episode. Article title:Genetic diversity and regulatory features of human-specific NOTCH2NL duplications First author:Real TD Journal:Cell Genomics DOI:10.1016/j.xgen.2026.101194 Reference:Real TD, Hebbar P, Yoo D, et al. Genetic diversity and regulatory features of human-specific NOTCH2NL duplications. Cell Genomics. 2026;6:101194. doi:10.1016/j.xgen.2026.101194 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/notch2nl-duplications-regulation QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-21. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited portions of the transcript covering NOTCH2NL background, independent ape duplications and human copies, interlocus gene conversion (IGC) and the NOTCH2tv paralog, paralog-specific regulatory landscapes (Fiber-seq/FiberFold), organoid transcriptomics, and protein stability assays.- transcript topics: NOTCH2NL background and brain expansion; Long-read haplotypes and independent duplications; Interlocus gene conversion and NOTCH2tv; Paralog-specific regulatory landscapes and chromatin accessibility; Organoid transcriptomics and protein stability of NOTCH2NL paralogs; Evolutionary timing and limitations of methods QC Summar... Chapters (00:00:16) - Base by Base: Quantifying genomics(00:00:29) - The genetic stutter that built the human brain(00:06:54) - Long-read sequencing of the human genome(00:12:28) - Interlocus gene conversion in the human genome(00:17:57) - Notch2NL and the genetics of the human brain

Hawkins AG et al., Cell Genomics - This episode summarizes Hawkins et al.'s presentation of the Single-Cell Pediatric Cancer Atlas (ScPCA) Portal, a publicly available resource that provides uniformly processed sc/snRNA-seq data and standardized metadata for pediatric tumors. The Portal hosts summarized expression data for over 700 samples across 55 pediatric cancer types, downloadable as SingleCellExperiment or AnnData objects and accompanied by QC reports, automated and curated cell-type annotations, and CNV estimates. The team also introduces scpca-nf, an open-source Nextflow workflow using alevin-fry for efficient, reproducible processing and support for additional modalities such as CITE-seq, cell hashing, bulk RNA-seq, and spatial data. The resource aims to accelerate pediatric cancer research by reducing reprocessing time and enabling cross-sample analyses. Key terms: single-cell RNA-seq, pediatric cancer, data portal, scpca-nf, alevin-fry. Study Highlights:The ScPCA Portal aggregates uniformly processed sc/snRNA-seq data for over 700 samples spanning 55 pediatric cancer types and provides downloads ready for analysis in R and Python. Data are processed with an open-source Nextflow workflow (scpca-nf) that uses alevin-fry for fast quantification and includes QC, dimensionality reduction, consensus cell-type annotations, and inferCNV estimates. The Portal supports multimodal datasets (CITE-seq, HTO, bulk RNA-seq, spatial) and provides merged project objects without batch correction to facilitate user-driven integration. OpenScPCA curated annotations complement automated labels to better distinguish malignant from normal cells. Conclusion:The ScPCA Portal and scpca-nf deliver a modular, openly accessible platform of standardized pediatric tumor single-cell data and tools to speed reproducible discovery and cross-sample comparisons in pediatric cancer research. Music:Enjoy the music based on this article at the end of the episode. Article title:The Single-Cell Pediatric Cancer Atlas: Data portal and open-source tools for single-cell transcriptomics of pediatric tumors First author:Hawkins AG Journal:Cell Genomics DOI:10.1016/j.xgen.2026.101283 Reference:Hawkins AG, Shapiro JA, Spielman SJ, et al. The Single-Cell Pediatric Cancer Atlas: Data portal and open-source tools for single-cell transcriptomics of pediatric tumors. Cell Genomics 6, 101283 (2026). https://doi.org/10.1016/j.xgen.2026.101283 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/scpca-data-portal-tools-single-cell-pediatric-cancer QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-20. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited sections include portal overview and dataset scope, data formats and access, SCPCA-nf workflow and quality-control steps, annotation strategy and consensus labeling, CNV inference for malignancy, multimodal data modalities, batch-merging limitations, democratization of access, and future directions.- t...

Felici B et al., Cell Genomics - A concise review of how post-GWAS methods are being used to move from statistical associations to translational insights by integrating drug-target prioritization, single-cell resolution of regulatory mechanisms, and imaging-derived organ phenotypes. Key terms: GWAS, drug discovery, single-cell, imaging genetics, polygenic scores. Study Highlights:This review synthesizes recent advances in translating GWAS findings into therapeutic targets, single-cell resolved mechanisms, and imaging-derived organ phenotypes. It outlines methods including fine-mapping, sc-eQTL mapping, colocalization, imaging GWAS, and Mendelian randomization to link variants to genes, cell types, proteins, and organ function. Case studies show genetics-informed target prioritization and drug repurposing, and the use of imaging IDPs and polygenic scores to refine discovery and prediction. The authors emphasize key challenges such as limited ancestry diversity, small single-cell cohorts, and difficulty inferring causality across biological scales. Conclusion:Integrating GWAS with single-cell and imaging data can accelerate target prioritization and translational discovery, but progress depends on larger, diverse cohorts and improved causal, multi-modal frameworks. Music:Enjoy the music based on this article at the end of the episode. Article title:Translating genome-wide association studies at multiple scales: Drug target prioritization, cellular architectures, and organ imaging First author:Felici B Journal:Cell Genomics DOI:10.1016/j.xgen.2026.101282 Reference:Felici B, Chen S, Yuan M, Jiang X, Ip S, Rudd JHF, Inouye M. Translating genome-wide association studies at multiple scales: Drug target prioritization, cellular architectures, and organ imaging. Cell Genomics. 2026;6:101282. doi:10.1016/j.xgen.2026.101282 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/translating-gwas-multiple-scales QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-18. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Assessed the transcript's coverage of the multi-scale GWAS translation framework, including cellular and imaging scales, concrete gene/target examples, pharmacogenomics, noncoding variants, brain-heart axis, perturb-seq and AI modeling, and limitations; cross-checked against the canonical text for consistency and accur- transcript topics: Multi-scale genomics framework (molecular, cellular, organ); Single-cell omics and scQTL causal inference; Imaging genetics and imaging-derived phenotypes (IDPs); Genetic target examples: PCSK9, ANGPTL3, TYK2, BCL11A; Non-coding regulatory variants and gene regulation; Brain-heart-eye axis and cross-organ pleiotropy QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 8- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_t...

Garcia-Salinas OI et al., The American Journal of Human Genetics - Garcia-Salinas et al. develop a bioinformatic pipeline to recover early parental postzygotic mutations (PZMs) from standard-depth (~30×) trio WGS and apply it to 12,015 rare-disease trios, producing a catalog of 1,015 high-confidence autosomal parental PZMs and assessing their genomic features and clinical relevance. Key terms: parental mosaicism, postzygotic mutations, trio WGS, mutational spectrum, clinical genetics. Study Highlights:The authors screened unfiltered candidate de novo sites across 12,015 trios and identified 1,015 high-confidence early autosomal parental PZMs with a monomodal blood VAF distribution centered around ~5%. PZMs showed no parental age or sex bias and a distinct substitution spectrum relative to germline DNMs, with enrichment for C>A and T>A and depletion of T>C. Mutational-signature analysis attributed most variants to clock-like signatures SBS1 and SBS5 in similar proportions for PZMs and DNMs. The study recovered clinically relevant missed variants, including likely reportable events in WT1 and DYNC1H1, illustrating diagnostic and recurrence-risk implications. Conclusion:A lightweight annotation applied to standard clinical trio WGS can recover early parental mosaic variants at scale, revealing distinct spectral and genomic patterns and identifying clinically actionable variants that routine pipelines often miss, though detection is constrained to an intermediate VAF window by standard-depth sequencing. Music:Enjoy the music based on this article at the end of the episode. Article title:Landscape of parental postzygotic mutations across >11,000 rare disease trios First author:Garcia-Salinas OI Journal:The American Journal of Human Genetics DOI:10.1016/j.ajhg.2026.06.015 Reference:Garcia-Salinas OI, Andrews KA, Sanghvi R, et al. Landscape of parental postzygotic mutations across >11,000 rare disease trios. The American Journal of Human Genetics. 2026;113:1–9. https://doi.org/10.1016/j.ajhg.2026.06.015 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/hidden-mosaic-parental-pzms-417 QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-18. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript sections describing (a) the concept of parental postzygotic mutations (PZMs) and their discovery from standard-depth trio WGS, (b) VAF distributions and timing, (c) mutational spectra and clock-like signatures SBS1/SBS5, (d) GC-content distribution, (e) clinical implications including WT1 and DYN- transcript topics: Definition and origin of parental postzygotic mutations (PZMs) and mosaicism; Limitations of standard diagnostic pipelines and 30× trio WGS; Bioinformatic pipeline to recover PZMs from DNM candidates; Variant allele fraction (VAF) distribution and timing (approx. third cell division); Mutational spectra and clock-like signatures SBS1/SBS5 in PZMs vs DNMs; GC-content associations and...

Kapoor RR et al., PNAS - A systematic screen of 319 arthropod genomes reveals genes formed by in‑frame fusion of horizontally transferred nonmetazoan sequences with endogenous metazoan regions. Many of these HGT-chimeras are transcribed, conserved, and show coherent domain architectures, implicating them in diverse biological processes. Key terms: horizontal gene transfer, gene fusion, arthropods, novel genes, molecular evolution. Study Highlights:The authors developed an intragenic phylogenetic pipeline and screened 319 high-quality arthropod genomes to identify HGT-chimeras. They report 274 chimeric genes corresponding to 104 independent origination events derived from bacteria, viruses, fungi, and plants. RT-PCR and Sanger sequencing validated contiguous chimeric mRNA expression for 36 of 41 tested chimeras, and molecular evolution analyses show widespread purifying selection and functional domain assembly. Evidence indicates gene duplication and postfusion divergence often accompany chimera formation, suggesting a recurrent route to novel gene functions. Conclusion:Fusion of horizontally acquired sequences with endogenous metazoan sequences has been a recurrent source of novel genes in arthropods, producing expressed, conserved chimeric proteins that likely contribute to organismal biology and evolution. Music:Enjoy the music based on this article at the end of the episode. Article title:Evolutionary innovation through fusion of sequences from across the tree of life First author:Kapoor RR Journal:PNAS DOI:10.1073/pnas.2602557123 Reference:Kapoor RR, Rona I, Extavour CG, et al. Evolutionary innovation through fusion of sequences from across the tree of life. Proc Natl Acad Sci U S A. 2026;123(29):e2602557123. doi:10.1073/pnas.2602557123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/hgt-chimeras-fusion-across-tree-of-life QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-18. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript's core scientific narrative: definition and existence of HGT-chimeras in arthropods; the 319-genome screen; 274 chimeras in 104 origination events; RT-PCR validation (36/41 across 18 species); evidence of purifying selection (dN/dS < 1) and selected exemplars (shrimp, copepod, damselfly, mosquito- transcript topics: HGT-chimera concept and definition; Scope of arthropod genome survey (319 genomes); Quantitative results (274 chimeras, 104 origination events, 109 HGT intervals); RT-PCR validation and transcriptional evidence (36/41 across 18 species); Purifying selection and dN/dS interpretation; Exemplar cases: shrimp cluster 12, copepod cluster 14, damselfly cluster 41, mosquito cluster 9 QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 4- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_tit...

PNAS - This episode breaks down a PNAS study that identifies a druggable pocket in the ERG transcription factor PNT domain and describes PBITE-1, a small-molecule probe that binds this pocket to inhibit ERG-driven prostate cancer models. Key terms: ERG, PNT domain, PBITE-1, prostate cancer, small-molecule inhibitor. Study Highlights:The authors show that TMPRSS2:ERG-positive prostate cancer cells remain dependent on ERG for survival and tumor maintenance. A domain-focused DSF screen identified F0341 as a PNT-domain binder and SAR optimization yielded PBITE-1, which engages a solvent-exposed pocket spanning two helices and a flexible loop. PBITE-1 selectively stabilizes ERG in cells, suppresses ERG target genes, reduces proliferation and invasion, induces apoptosis in ERG-positive cell lines and organoids, and triggers tumor cell apoptosis in VCaP xenografts. Conclusion:The ERG N-terminal PNT domain contains a structurally coherent, ligandable pocket; PBITE-1 provides proof-of-concept that ERG can be directly targeted by small molecules, laying groundwork for future ERG-directed inhibitors and degrader strategies for TMPRSS2:ERG-driven cancers. Music:Enjoy the music based on this article at the end of the episode. Article title:A ligandable PNT domain establishes ERG as a directly targetable oncogenic driver in prostate cancer Journal:PNAS DOI:10.1073/pnas.2537437123 Reference:https://doi.org/10.1073/pnas.2537437123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/erg-pnt-pbite-1 QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-18. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript sections describing ERG dependency in TMPRSS2:ERG-positive prostate cancer, DSF screening and hit identification (F0341), SAR optimization to PBITE-1, binding and target engagement assays (NMR, BLI, CETSA), cellular effects (viability, apoptosis, ERG target gene suppression), organoid and in vivo- transcript topics: ERG dependency in TMPRSS2:ERG-positive prostate cancer; Domain-focused differential scanning fluorimetry (DSF) screen; PBITE-1 discovery and SAR optimization; PBITE-1 binding interface mapping to ERG PNT domain (NMR, docking, H2/H6); Target engagement and cellular effects (CETSA, cell viability, apoptosis, ERG target genes); Organoid and in vivo VCaP xenograft data QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 7- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- TMPRSS2:ERG fusion occurs in approximately 50% of prostate cancers in patients of European ancestry.- PBITE-1 engages a discrete solvent-exposed surface within the ERG PNT domain, defining a ligand-binding pocket.- PBITE-1 directly binds the ERG PNT domain and stabilizes full-length ERG in cell...

Carballar-Lejarazúa R et al., PNAS (2026) - This episode summarizes a 2-year, 35-generation multireplicate cage trial evaluating three autonomous Cas9/gRNA gene-drive strains (AcTP13, AcTP43 in Anopheles coluzzii; AgTP13 in Anopheles gambiae). The study tracked drive inheritance, cassette integrity, resistance allele emergence, off-target activity, and sustained antiparasite efficacy against Plasmodium falciparum. Key terms: gene drive, Anopheles, Cas9/gRNA, parasite suppression, long-term stability. Study Highlights:Over 2 years (35 generations) triplicate cage trials of three Cas9/gRNA gene-drive strains monitored drive dynamics, cassette integrity, resistance, off-target effects, and parasite suppression. All A. coluzzii replicates achieved rapid fixation and remained stable; two AgTP13 replicates fixed while one accumulated a functional cleavage-resistant allele that reduced drive frequency. Effector transgene sequences and mRNA expression were largely preserved, though one AcTP43 replicate lost a TP10 monomer copy. Parasite challenge assays at low and medium-low gametocytemias showed significant reductions in oocyst and sporozoite prevalence and intensity. Conclusion:Multimetric longitudinal data show that Cas9/gRNA-based population-modifying drives can remain genetically stable and retain antiparasite activity over a 2-year period in laboratory Anopheles populations, with replicate-level resistance emergence underscoring the need for replicated risk assessment and monitoring. Music:Enjoy the music based on this article at the end of the episode. Article title:Long-term stability and performance of Cas9/guide RNA-based gene drives in anopheline mosquitoes First author:Carballar-Lejarazúa R Journal:PNAS (2026) DOI:10.1073/pnas.2605739123 Reference:Carballar-Lejarazúa R, Winokura L, Pham TB, Tushar T, Tao M, Dimopoulos G, James AA, et al. Long-term stability and performance of Cas9/guide RNA-based gene drives in anopheline mosquitoes. PNAS. 2026;123(28):e2605739123. doi:10.1073/pnas.2605739123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/414-gene-drive-stability-anopheles QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-17. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript sections describing gene-drive mechanism, target-product profile criteria, long-term cage trials, molecular/cassette integrity, resistance emergence, off-target analysis, and parasite-suppression outcomes, with attention to quantitative results and limitations.- transcript topics: Gene-drive mechanism and inheritance (Cas9/gRNA, HDR); Target Product Profile (TPP) criteria for gene-drive systems; Long-term cage trial design (AcTP13, AcTP43 in Anopheles coluzzii; AgTP13 in Anopheles gambiae); Cargo design and tracking markers (CFP, mCherry) and antiparasite effectors (M1C3, M2A10, MultiEff, TP10, EPIP); Resistance emergence at the target site (AgTP13) and 3 bp insertion; Payload stability and tandem repeats (...

Wu J-S et al., PNAS - A PNAS study using smFRET and nano-positioning triangulation maps dynamic positioning of the Rpc34 WH2 domain in yeast Pol III elongation complexes and presents a thiol-capping SPAAC labeling strategy to enable selective site-specific fluorophore attachment. Key terms: RNA polymerase III, Rpc34, winged helix, smFRET, bio-orthogonal labeling. Study Highlights:Using smFRET with ALEX and nano-positioning triangulation, the authors show Rpc34 WH2 occupies three discrete positions across the Pol III DNA-binding cleft and dynamically interconverts among them. A bio-orthogonal labeling workflow—azido-UAA incorporation plus SPAAC with thiol-capping—enabled selective labeling in the cysteine-rich complex. Maf1 binding locks WH2 into the upstream/distal state, validating positional assignments, and HMM dwell-time analysis revealed ordered transitions that proceed through the middle state with characteristic lifetimes. These results indicate Rpc34 WH2 engages the elongation complex via transient, weak DNA and protein contacts, with potential roles in bubble stabilization and rapid reinitiation. Conclusion:Rpc34 WH2 is a mobile, multifunctional cleft-associated module that occupies three ordered positions to transiently engage the Pol III elongation complex, and the thiol-capping SPAAC labeling approach provides a robust route for smFRET studies of large native assemblies. Music:Enjoy the music based on this article at the end of the episode. Article title:Dynamic positioning of Rpc34 winged helix in RNA polymerase III elongation complex for its stability with implications for reinitiation First author:Wu J-S Journal:PNAS DOI:10.1073/pnas.2601775123 Reference:Wu J-S, Chang W-H, et al. Dynamic positioning of Rpc34 winged helix in RNA polymerase III elongation complex for its stability with implications for reinitiation. Proc Natl Acad Sci U S A. 2026;123(27):e2601775123. doi:10.1073/pnas.2601775123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/base-by-base-413-rpc34-wh2-pol3-dynamics QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-12. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript portions describing Rpc34 WH2 dynamics, labeling strategy, three-state model, Maf1 effects, NPS localization, and rapid reinitiation implications, comparing to the original article.- transcript topics: Rpc34 WH2 dynamics in Pol III elongation complex; smFRET labeling strategy (azido-UAA, SPAAC, MMTS); Maf1 regulation of WH2 mobility; Nano-positioning system (NPS) localization; Three-state model: distal, middle, proximal; Implications for rapid reinitiation and Pol III processivity QC Summary:- factual score: 9/10- metadata score: 10/10- supported core claims: 6- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license...

Scurich N et al., PNAS - A concise breakdown of a PNAS perspective that analyzes forensic proficiency testing practices using the 2023 CTS firearms test as a case study. The authors identify test design and administration flaws—easy items, consensus scoring, handling of inconclusives, nonblind verification, shot‑to‑shot variability, and contextual bias—that undermine claims about examiner accuracy and the utility of reported error rates for courts and laboratories. Key terms: forensic proficiency testing, firearm identification, false positive rate, test design, cognitive bias. Study Highlights:The authors analyze CTS Test 23‑5262 and report a false‑positive rate of about 20% for bullet comparisons, highlighting broader concerns. They identify structural issues in proficiency testing including ceiling effects from easy items, inconsistent scoring of inconclusives, reliance on consensus rather than ground truth, and nonblind verification. The paper argues these features confound examiner performance with test properties, limiting the tests’ ability to estimate operational error rates and inform court decisions. The authors recommend better test design, blind verification, confidence ratings, and use of objective metrics to improve validation and lab practice. Conclusion:Current forensic proficiency testing practices can conceal fundamental weaknesses in examiner performance and test design; systemic, evidence‑based reform is needed to provide courts and laboratories with meaningful estimates of reliability and to reduce risks of wrongful outcomes. Music:Enjoy the music based on this article at the end of the episode. Article title:Assessing the foundations of forensic identification evidence: A critical examination of proficiency test design and results First author:Scurich N Journal:PNAS DOI:10.1073/pnas.2528192123 Reference:Scurich N, Albright TD. Assessing the foundations of forensic identification evidence: A critical examination of proficiency test design and results. PNAS. 2026; Vol.123:e2528192123. doi:10.1073/pnas.2528192123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/fault-lines-forensic-proficiency-testing QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-12. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript sections describing CTS proficiency testing (Test 23-5262), the reported false-positive rates, consensus scoring and inconclusives, out-of-class eliminations, shot-to-shot variability and reproducibility, contextual bias and NIBIN leads, nonblind verification, signal detection theory as reform, a- transcript topics: CTS proficiency testing overview and purpose; CTS Test 23-5262 design and ground truth; False-positive rate findings (around 20%; 19.2% excluding item 4; 22% at least one false positive); Consensus scoring and handling of inconclusives; Out-of-class eliminations (Item 4) and associated errors; Class characteristics and reproducibility concerns across tes...

Nihata A et al., PNAS - This PNAS study describes the development of EKV, a humanized dividing cell line that propagates bona fide sporadic CJD (sCJD) prions, and the Human Prion Assay (HPA), a cell-based method that quantifies infectivity with sensitivity comparable to transgenic mouse bioassay while enabling rapid therapeutic screening. Key terms: sCJD, EKV cells, Human Prion Assay, prion infectivity, anti-PrP antibody. Study Highlights:The authors engineered EKV cells by reconstituting CAD5 PrP-knockdown cells with human PrP (V129) and iterative single-cell cloning to enrich prion susceptibility. EKV cells propagate de novo infectious sCJD prions that reproduce strain-specific pathology when transmitted to humanized Tg152c mice. The Human Prion Assay (HPA) using EKV cells quantifies sCJD infectivity across a wide dynamic range with sensitivity comparable to mouse bioassay but in weeks rather than years. Persistently infected iEKV clones can be cured by the anti-PrP monoclonal antibody ICSM18, validating the platform for high-throughput therapeutic screens. Conclusion:EKV cells and the HPA provide a renewable, scalable, and faster alternative to animal bioassays for measuring authentic human sCJD infectivity and for screening and validating anti-prion therapeutics, while retaining strain-specific biological properties. Music:Enjoy the music based on this article at the end of the episode. Article title:A scalable, dividing cell model for the robust propagation and quantification of human sporadic Creutzfeldt–Jakob disease prions First author:Nihata A Journal:PNAS DOI:10.1073/pnas.2600341123 Reference:Nihata A, Collinge J, Linehan J, Brandner S, Mead S, Schmidt C, Rayner MLD, Jat PS, Arora P, et al. A scalable, dividing cell model for the robust propagation and quantification of human sporadic Creutzfeldt–Jakob disease prions. PNAS. 2026;123(27):e2600341123. doi:10.1073/pnas.2600341123. License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/ekv-human-prion-assay QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-09. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Substantive audit focused on EKV cell development and validation, in vitro propagation of human sCJD prions, HPA implementation and benchmarking against mouse bioassay, drug-screening demonstration, and documented limitations (codon 129 mismatch, occult infectivity).- transcript topics: Prion biology and strain concepts (PRNP codon 129 polymorphism); Historical barriers to human prion culture and need for cell-based infectivity assays; Engineering EKV cells: CAD5-KDB3, human PrP V129, mouse signal peptide; Iterative single-cell cloning and enrichment to EKV; Infectivity validation via transmission to Tg152c mice; Development and validation of the Human Prion Assay (HPA) QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 6- claims flagged for review: 0- metadata checks passed: 4-...

Abson KL et al., PNAS - A cross-species synthesis and theory paper showing that simple molecular diversity metrics poorly predict short-term adaptive potential. The authors compiled >2,100 quantitative genetics estimates (evolvability and heritability) across ~193 eukaryotic species and compared them to nucleotide diversity (π) and microsatellite heterozygosity (He). They find nucleotide diversity explains only ~1.1% of interspecific variation in evolvability and that doubling π corresponds to a modest ~11.7% increase in evolvability. Theoretical models indicate this weak relationship is expected when trait variance is shaped by stabilizing selection, mutation rates, and effective population size dynamics. Key terms: nucleotide diversity, evolvability, adaptive potential, conservation genetics, microsatellites. Study Highlights:The authors compiled 2,113 evolvability estimates across 193 eukaryotic species and matched these to measures of nucleotide diversity (π) and microsatellite heterozygosity (He). They found no meaningful association between ln(IA) (evolvability) and ln(π): π explained ~1.1% of interspecific variation and doubling π predicts only an ~11.7% increase in evolvability. Microsatellite and nucleotide diversity were uncorrelated across species, and both molecular measures were weak predictors of quantitative genetic variation. Theoretical mutation–selection–drift models show weak associations are expected under stabilizing selection and when VA depends more on mutation rate and selection than on neutral diversity. Conclusion:Simple, genome-wide molecular diversity metrics (π, He) are poor predictors of short-term adaptive potential (evolvability); conservation assessments should not rely on these alone and should incorporate trait-based or functionally informed genomic data. Music:Enjoy the music based on this article at the end of the episode. Article title:Nucleotide diversity is a poor predictor of short-term adaptive potential First author:Abson KL Journal:PNAS DOI:10.1073/pnas.2536181123 Reference:Abson KL, Zijmers L, Mittell EA, Young EA, Postma E, Eyre-Walker A, Hadfield JD. Nucleotide diversity is a poor predictor of short-term adaptive potential. Proc Natl Acad Sci U S A. 2026;123(27):e2536181123. doi:10.1073/pnas.2536181123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/nucleotide-diversity-poor-predictor-adaptive-potential QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-08. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript's coverage of core scientific claims: relationship between π and IA, the π vs He relationship, functional variation (πN/πS), the theoretical basis (stabilizing selection), and conservation implications/policy directions.- transcript topics: Adaptive potential and evolvability (IA) concept; Nucleotide diversity (π) as predictor of evolvability; Microsatellite diversity (He) and its relation to π and IA; Theoretical mutation–selection...

Shin J et al., PNAS - This episode examines a large transcriptome compendium (PRECISE-NP881) that profiles E. coli K-12 MG1655 across 43 carbon substrates. Independent component analysis resolved 137 iModulons, including 25 carbon-catabolism modules that organize substrates into four activity-defined groups tied to growth rate, substrate chemistry, metabolic entry routes, and proteome allocation. The study integrates growth phenotyping, FBA/ME-modeling, targeted knockouts, and reanalysis of a starvation/refeeding time course to connect transcriptional modules to physiological context. Key terms: carbon response, iModulon, Escherichia coli, carbon catabolite repression, transcriptional regulatory network. Study Highlights:The authors assembled PRECISE-NP881 (881 transcriptomes) and used ICA to define 137 iModulons, 25 of which are carbon-catabolism modules whose activities cluster substrates into four groups. Faster-growing sugars showed limited CRP-linked remodeling while slower-growth, non-glycolytic substrates activated CRP-linked, NtrC-1, Propionate, and SgcABCEQX iModulons. Targeted knockouts (e.g., ΔprpC) demonstrated conditional growth defects on Group C/D substrates supporting a role for methylcitrate-mediated propionyl-CoA processing. Proteome-allocation modeling and projection of an independent starvation/refeeding dataset corroborated links between carbon-response modules, growth/stress physiology, and metabolite dynamics. Conclusion:The paper provides a quantitative atlas of carbon-responsive transcriptional states in E. coli, decomposing CCR into separable CRP-linked and substrate-specific modules and linking these modules to growth rate, metabolic context, proteome allocation, and conditional physiological relevance. Music:Enjoy the music based on this article at the end of the episode. Article title:A systems-level atlas of carbon-response transcriptional states in Escherichia coli First author:Shin J Journal:PNAS DOI:10.1073/pnas.2531884123 Reference:Shin J, Son HF, Krishnan J, Hefner Y, Szubin R, Sung J, Patel A, Lou XA, Catoiu EA, Palsson BØ, Zielinski DC. A systems-level atlas of carbon-response transcriptional states in Escherichia coli. PNAS. 2026;123(27):e2531884123. doi:10.1073/pnas.2531884123. License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/atlas-carbon-response-transcriptional-states-e-coli QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-07. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript sections describing PRECISE-NP881 atlas construction ( ICA/iModulons ), four substrate groups (A–D), CRP decomposition into Crp-1/Crp-2/Crp-3, NtrC-1 and Propionate iModulons linked to propionyl-CoA stress, methylcitrate pathway (prpC/astC), SgcABCEQX prophage iModulon, starvation/refeeding dynam- transcript topics: ICA-based iModulon analysis; CRP-linked iModulons decomposition (Crp-1, Crp-2, Crp-3); Four substrate groups (A–D) and growth phenotypes; NtrC-1 and Propiona...

Tsakiria E et al., Proceedings of the National Academy of Sciences (PNAS) - Using Tau knockout mice and the C. elegans PTL-1 deletion, this study shows that loss of wild-type Tau promotes a conserved shift toward mitochondrial fusion, increases respiratory activity, membrane potential and mitophagy, raises ROS, and enhances stress resilience. The adaptive phenotypes depend on mitofusin/FZO-1 and are phenocopied by FZO-1 overexpression. Key terms: Tau protein, mitochondrial fusion, mitofusin (FZO-1), mitophagy, neurodegeneration. Study Highlights:Across mouse and nematode models, Tau/PTL-1 deficiency increased basal and ATP-linked respiration, mitochondrial membrane potential, and ROS while enhancing mitophagy. Loss of Tau shifted mitochondrial morphology toward a pro-fusion state with increased mitofusin (Mfn1/2/FZO-1) localization and reduced Drp1 recruitment. Genetic removal of the mitofusin FZO-1 abolished the enhanced bioenergetics, motility, longevity under stress, and stress resistance, whereas FZO-1 overexpression phenocopied key Tau-loss features. These results identify a conserved, mitofusin-dependent mechanism by which wild-type Tau restrains mitochondrial fusion and functional adaptation. Conclusion:Wild-type Tau acts as a conserved negative regulator of mitochondrial fusion and functional adaptation; its loss triggers FZO-1/mitofusin-dependent mitochondrial remodeling that elevates bioenergetics and stress resilience in a context-dependent manner. Music:Enjoy the music based on this article at the end of the episode. Article title:Tau protein as a regulator of mitochondrial function and dynamics First author:Tsakiria E Journal:Proceedings of the National Academy of Sciences (PNAS) DOI:10.1073/pnas.2521642123 Reference:Tsakiria E., Campos-Marques C., Ferreira I.L., Trougakos I.P., Dioli C., Gianniou D.D., Silva J.M., Skourti K., Roussos A., Samiotaki M., Sotiropoulos I., Palikaras K., et al. Tau protein as a regulator of mitochondrial function and dynamics. Proc Natl Acad Sci U S A. 2026; doi:10.1073/pnas.2521642123. License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/tau-mitochondrial-fusion-episode-408 QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-06. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Substantively audited sections covering: WT Tau localization and baseline role; Tau/PTL-1 deficiency effects on respiration and mitophagy; pro-fusion shift and changes in fission/fusion proteins; ROS dynamics and hormetic effects; dependency on FZO-1 and rescue via FZO-1 overexpression; implications for Tau-lowering th- transcript topics: Tau deficiency and mitochondrial respiration (Seahorse data in Tau-KO mice and PTL-1 KO worms); Mitochondrial morphology and fusion/fission regulators (DRP-1, MFN1/MFN2, form factor); Mitophagy dynamics in Tau/PTL-1 deficiency; ROS production and membrane potential changes; ROS-mediated hormesis and antioxidant effects (NAC) across conditions; Genetic dissection...

Norberg ES et al., Proceedings of the National Academy of Sciences - Using metal‑responsive fluorescent Salmonella reporters, calf intestinal loops, and CRISPR edited epithelial cells, this study shows that the divalent metal transporter SLC11A2 is recruited to Salmonella‑containing vacuoles and restricts Fe2+ and Mn2+, limiting intracellular bacterial replication. Key terms: SLC11A2, nutritional immunity, Salmonella enterica, iron and manganese, intestinal epithelium. Study Highlights:The authors used metal‑sensing GFP reporters in Salmonella and a calf ligated ileal loop model to map metal availability and found a subpopulation of bacteria in IECs and lamina propria cells exposed to ≤0.1 µM Fe2+ and Zn2+, and possibly Mn2+, early in infection. SLC11A2 localized to the apical surface and endosomal network of IECs and was recruited to maturing Salmonella‑containing vacuoles; CRISPR knockout of SLC11A2 in HCT116 epithelial cells increased bacterial replication. Fluorescent reporters and ICP‑MS indicate vacuolar STm are less starved for Fe2+ and Mn2+ in the absence of SLC11A2, while Zn2+ and Mg2+ sensing was unchanged. Salmonella counters SLC11A2‑mediated restriction through the Mn2+/Fe2+ transporter MntH and siderophore production. Conclusion:SLC11A2 mediates epithelial nutritional immunity by sequestering Fe2+ and Mn2+ in Salmonella‑containing vacuoles, reducing vacuolar metal availability and limiting intracellular Salmonella replication. Music:Enjoy the music based on this article at the end of the episode. Article title:SLC11A2 withholds divalent metals fromSalmonellain the gut epithelium First author:Norberg ES Journal:Proceedings of the National Academy of Sciences DOI:10.1073/pnas.2532675123 Reference:Norberg ES, Knodler LA, et al. SLC11A2 withholds divalent metals from Salmonella in the gut epithelium. PNAS. 2026;123:e2532675123. doi:10.1073/pnas.2532675123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base is independent and ad-free — no sponsors, no paywall. If an episode was worth your time, chip in and keep the papers audited and the original songs coming:❤️ Support monthly: https://buy.stripe.com/cNifZhclVebvagk2JDgEg01☕ One-time donation: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 More at basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/slc11a2-withholds-divalent-metals-from-salmonella QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-05. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited transcript sections covering nutritional immunity concepts, IEC-localized SLC11A2 function, calf ileal loop in vivo model, metal-responsive STm reporters, SLC11A2 recruitment to SCVs, SLC11A2 knockout effects in HCT116 cells, bacterial countermeasures (MntH and siderophores), intracellular niches (SCV vs cytoso- transcript topics: Nutritional immunity and trace metal tug-of-war; SLC11A2 (NRAMP2) in intestinal epithelial cells; Calf ligated ileal loop model and metal availability; Metal-responsive Salmonella reporters (iroN, sitA, zinT); SLC11A2 recruitment to Salmonella-containing vacuoles; SLC11A2 knockout in HCT116 cells and impact on Salmonella replication QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 6- claims flagged for review: 0- metadata chec...

Synowiec A et al., Proceedings of the National Academy of Sciences (PNAS) - This episode examines a PNAS study using fetal, pediatric, and adult human intestinal enteroids to show that physiological temperature and developmental stage jointly determine susceptibility to HCoV-229E, with implications for extrapulmonary coronavirus infection and therapeutic testing. Key terms: HCoV-229E, intestinal enteroids, temperature sensitivity, age-dependent susceptibility, ANPEP/TMPRSS2. Study Highlights:The authors used age-stratified human intestinal enteroids (HIEs) and compared infection at 32 °C and 37 °C, finding temperature-dependent transcriptional reprogramming. HCoV-229E productively infected HIEs from all ages at 32 °C, but at 37 °C replication was largely restricted to fetal and some pediatric tissues. Enterocytes were identified as the primary target cells and viral progeny were released apically. Inhibition of serine proteases with camostat significantly reduced HCoV-229E replication, supporting a TMPRSS2-like entry dependency. Conclusion:Physiological temperature and developmental maturity create a dual barrier that limits intestinal replication of HCoV-229E in adults at 37 °C while permitting broader replication at cooler, upper-airway-like temperatures; HIEs provide a platform to probe host determinants and test entry-directed inhibitors such as camostat. Music:Enjoy the music based on this article at the end of the episode. Article title:Temperature and developmental stage govern intestinal susceptibility to human coronavirus 229E First author:Synowiec A Journal:Proceedings of the National Academy of Sciences (PNAS) DOI:10.1073/pnas.2600632123 Reference:Synowiec A., Lie L.K., Szczepański A., et al. Temperature and developmental stage govern intestinal susceptibility to human coronavirus 229E. Proc. Natl. Acad. Sci. U.S.A. 2026;123(26):e2600632123. https://doi.org/10.1073/pnas.2600632123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 Official website https://basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/temp-age-hcov-229e-ep406 QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-01. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the portions of the transcript describing: experimental design (age-stratified HIEs at 32°C vs 37°C), replication patterns of HCoV-229E (32°C broad permissivity; 37°C restricted), cell tropism (enterocytes as primary target), entry mechanism (ANPEP receptor, TMPRSS2 proteases), and protease inhibition (camostat- transcript topics: HCoV-229E infection in age-stratified human intestinal enteroids (HIEs); Temperature effects (32 °C vs 37 °C) on replication; Age dependence and donor variability; Cell type tropism and ANPEP/TMPRSS2 entry; Camostat inhibition and entry pathways; Limitations of the HIE model and translational implications QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 4- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- Three age groups of HIEs used: fetal, pediatric, adult- Seasonal HCoV...

Úbeda F et al., Proceedings of the National Academy of Sciences (PNAS) - A population-genetic model explains why sequence-specific PRDM9-guided recombination hotspots can evolve and persist alongside non-PRDM9 hotspots by trading off reduced overall binding for increased symmetric binding that more often yields crossovers. Key terms: PRDM9, recombination hotspots, biased gene conversion, symmetric binding, population genetics. Study Highlights:The authors develop a three-locus population genetic model and run analytical and numerical simulations to compare PRDM9-like (specific) versus non-PRDM9 (unspecific) hotspot mechanisms. They find non-PRDM9 hotspots are generally favored because they yield higher overall binding and more crossovers, but PRDM9 can be favored when symmetric binding more often resolves as crossovers. Intermediate parameter regimes permit stable coexistence or cyclical oscillations in the relative use of both hotspot types. The model makes testable predictions linking chromosome architecture and fertility costs to the evolutionary distribution of hotspot mechanisms. Conclusion:PRDM9 persistence reflects a trade-off: sequence specificity reduces average binding but increases symmetric homolog binding that can disproportionately raise crossover success; when the crossover-resolution advantage of symmetric binding outweighs binding loss, PRDM9 is favored or can coexist with non-PRDM9 mechanisms. Music:Enjoy the music based on this article at the end of the episode. Article title:On the origin of PRDM9-guided recombination hotspots First author:Úbeda F Journal:Proceedings of the National Academy of Sciences (PNAS) DOI:10.1073/pnas.2535682123 Reference:Úbeda F, Bürger R, Fyon F. On the origin of PRDM9-guided recombination hotspots. Proc Natl Acad Sci U S A. 2026;123(26):e2535682123. doi:10.1073/pnas.2535682123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 Official website https://basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/405-prdm9-hotspots QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-07-01. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript portions describing hotspot mechanisms, symmetric vs asymmetric binding, the three-locus model (modifier M, targeting A, target B), key results (dominance of non-PRDM9, potential PRDM9 advantage with symmetric binding, coexistence and oscillations), phylogenetic patterns and chromosome-size impli- transcript topics: PRDM9-guided recombination vs non-PRDM9 hotspots; Symmetric vs asymmetric binding in recombination; Three-locus population-genetic model (modifier, targeting, target loci); Evolutionary outcomes: dominance, coexistence, oscillations; Phylogenetic distribution and chromosome-size effects QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 4- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- Two hotspot mechanisms exist: PRDM9-guided (specific) and non-PRDM9 (open chromatin, sequence-independent).- PRDM9 hotspots erode via biased gene conversion; non-P...

Bošković F et al., Proceedings of the National Academy of Sciences - This study introduces RUNA, a reversible chemistry that selectively labels uridine/thymidine to map nucleic acids across membranes, and uses it to show that most exosomal DNA is surface-exposed, increases after PARP inhibitor treatment, and alters macrophage uptake and activation. Key terms: RUNA, exosomes, surface DNA, macrophage polarization, PARP inhibitor. Study Highlights:The authors developed Reversible Uridine Nitrilium-mediated Addition (RUNA), which selectively and reversibly modifies the N3 of uridine and thymidine via an in situ nitrilium ion. By varying aldehyde membrane permeability, RUNA distinguishes intra-vesicular from extravesicular nucleic acids. Applied to exosomes from MyC-CaP prostate cancer cells, RUNA shows most exosomal DNA is surface-exposed and nearly doubles after rucaparib (PARP inhibitor) treatment. Surface DNA promotes uptake by M2 macrophages through scavenger receptors and shifts them toward an M1-like proinflammatory profile. Conclusion:RUNA is a modular, reversible chemical tool to map nucleic acid accessibility across membranes; using it the authors reveal exosomal surface DNA as a dynamic, damage-responsive determinant of macrophage uptake and immune modulation with implications for tumor–immune interactions. Music:Enjoy the music based on this article at the end of the episode. Article title:A nucleic acid labeling chemistry reveals surface DNA on exosomes First author:Bošković F Journal:Proceedings of the National Academy of Sciences DOI:10.1073/pnas.2532281123 Reference:Bošković F, Dutta Gupta P, Zhang J, Szostak JW, Krishnan Y. A nucleic acid labeling chemistry reveals surface DNA on exosomes. Proc Natl Acad Sci U S A. 2026;123(27):e2532281123. doi:10.1073/pnas.2532281123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 Official website https://basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/runa-surface-dna-on-exosomes QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-06-30. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited sections describing RUNA mechanism, membrane-permeability tuning, exosome surface DNA, PARP-inhibitor effects on surface DNA, exosome uptake by M2 macrophages, macrophage polarization to an M1-like state, and study limitations.- transcript topics: RUNA mechanism and reversibility; Membrane permeability tuning to distinguish exRNA vs vesicular RNA; Exosome DNA topology: surface-exposed vs luminal; PARP inhibitor (rucaparib) effects on surface DNA; Exosome uptake by M2 macrophages via scavenger receptors; Macrophage polarization to M1-like state and cytokine changes QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 6- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- RUNA selectively labels uridine and thymidine at N3 to form a reversible covalent adduct.- The RUNA adduct is thermally reversible by heating (e.g., 95 C for 15 minutes).- Membrane-permeable vs membrane-impermeable aldehydes distinguish total...

Schnaiter S et al., The American Journal of Human Genetics - Pooled analysis of four cohorts (4,943 tumors) using the Myriad MyChoice HRD+ CDx assay quantified how HRD-related genomic instability scores (HRD-GIS) predict BRCA1 and BRCA2 variant pathogenicity and mapped likelihood ratios to ACMG/AMP evidence strengths. Key terms: homologous recombination deficiency, HRD-GIS, BRCA1, BRCA2, ovarian cancer. Study Highlights:Schnaiter et al. pooled Myriad MyChoice HRD+ CDx results from four cohorts totaling 4,943 high-grade ovarian tumors to assess whether tumor HRD-GIS predicts BRCA1/2 variant pathogenicity. They observed 91.0% of BRCApv tumors were GIShigh versus 30.0% of BRCAwt tumors. The pooled likelihood ratio for a variant being pathogenic in a GIShigh tumor was 3.03 (95% CI 2.88–3.19), equivalent to supporting pathogenic evidence, while GISlow had a pooled LR of 0.13 (95% CI 0.10–0.16), equivalent to moderate benign evidence. Results apply to HGOC samples assessed with the MyChoice assay and may aid ACMG/AMP variant classification, with noted cohort and assay limitations. Conclusion:HRD-GIS determined by the MyChoice HRD+ CDx assay in HGOC provides supporting evidence for BRCA1/2 pathogenicity when GIShigh and moderate benign evidence when GISlow, supporting its integration into ACMG/AMP variant interpretation. Music:Enjoy the music based on this article at the end of the episode. Article title:Homologous recombination deficiency-driven genomic instability in ovarian cancer as an indicator of BRCA1 and BRCA2 variant pathogenicity First author:Schnaiter S Journal:The American Journal of Human Genetics DOI:10.1016/j.ajhg.2026.05.015 Reference:Schnaiter S., Santer F.R., Csanaky K.A., et al. Homologous recombination deficiency-driven genomic instability in ovarian cancer as an indicator of BRCA1 and BRCA2 variant pathogenicity. The American Journal of Human Genetics. 113, 1–8 (2026). https://doi.org/10.1016/j.ajhg.2026.05.015 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 Official website https://basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/hrd-gis-brca-variant-classification QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-06-30. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript sections describing BRCA1/BRCA2 biology, genomic scars (LOH, TAI, LSTs), GIS scoring with MyChoice HRD+ CDx, Bayesian/ACMG interpretation, cohort details, and clinical implications, comparing them to the original article.- transcript topics: BRCA1 and BRCA2 role in homologous recombination; Genomic scar signatures: LOH, telomeric allelic imbalance, large-scale state transitions; Genomic instability score (GIS) and Myriad MyChoice HRD+ CDx assay; Bayesian LR framework and ACMG/AMP variant interpretation; Cohort details: Marburg, NHS, Study 19, NOVA; limitations (germline vs somatic, HGOC focus); Clinical implications for BRCA variant classification and VUS QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 6- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited...

Schnaiter et al et al., The American Journal of Human Genetics - Schnaiter et al. pooled Myriad MyChoice HRD+ CDx results from four cohorts (4,943 HGOC tumors) to test whether tumor HRD-related genomic instability scores (HRD-GIS) provide evidence for BRCA1 and BRCA2 variant classification under ACMG/AMP criteria. Key terms: homologous recombination deficiency, genomic instability score (HRD-GIS), BRCA1, BRCA2, MyChoice HRD+ CDx. Study Highlights:The authors analyzed 4,943 tumors (765 BRCApv, 4,178 BRCAwt) assessed with the MyChoice HRD+ CDx assay and found 91.0% of BRCApv tumors were GIShigh (≥42) versus 30.0% of BRCAwt. The pooled likelihood ratio (LR) that a variant is pathogenic in a GIShigh HGOC was 3.03 (95% CI: 2.88–3.19), mapping to supporting pathogenic evidence. Conversely, the pooled LR for GISlow (<42) was 0.13 (95% CI: 0.10–0.16), mapping to moderate benign evidence. Results were consistent across three cohorts but limited by assay type, cohort composition, and incomplete second-hit and germline/somatic data. Conclusion:HRD-GIS measured by the MyChoice HRD+ CDx assay in HGOC yields statistically robust evidence that can be applied within ACMG/AMP variant interpretation: GIShigh supports pathogenicity (supporting strength) and GISlow supports benign classification (moderate strength), potentially improving BRCA1/2 VUS resolution. Music:Enjoy the music based on this article at the end of the episode. Article title:Homologous recombination deficiency-driven genomic instability in ovarian cancer as an indicator of BRCA1 and BRCA2 variant pathogenicity First author:Schnaiter et al Journal:The American Journal of Human Genetics DOI:10.1016/j.ajhg.2026.05.015 Reference:Schnaiter et al., 2026, The American Journal of Human Genetics 113, 1–8. https://doi.org/10.1016/j.ajhg.2026.05.015 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 Official website https://basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/hrd-gis-brca-variant-pathogenicity QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-06-26. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript's coverage of HRD-GIS mechanism, BRCA1/BRCA2 variant interpretation via ACMG/AMP LR framework, threshold 42 (GIShigh vs GISlow), cohort data (Marburg, NHS, Study 19, NOVA), the Myriad MyChoice HRD+ CDx assay, and discussed limitations (second hits, germline vs somatic, assay-specific validation).- transcript topics: HRD-GIS mechanism in HGOC; BRCA1/BRCA2 function and HRD; Genomic scar metrics: LOH, TAI, LST; GIS scoring threshold and GIShigh/GISlow; Likelihood ratio framework and ACMG/AMP evidence mapping; Cohort data and Myriad MyChoice HRD+ CDx validation QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 6- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- HRD-GIS is a composite of LOH, telomeric allelic imbalance (TAI), and large-scale state transitions (LST).- GIS high is GIS ≥ 42; GIS low is GIS < 42.- Dataset comprised 4,943 HGOC tumors (765 BRCApv, 4,178 BRCAwt...

Baya N et al., The American Journal of Human Genetics 113, 1–19 (2026) - Baya et al. applied a misalignment framework to UK Biobank polygenic scores and exomes and found that individuals whose observed phenotypes deviate from polygenic expectation are enriched for rare damaging variants across multiple traits and diseases. Key terms: polygenic scores, rare variants, misalignment, liability threshold, UK Biobank. Study Highlights:The authors define 'misaligned' individuals whose covariate-residualized phenotypes differ markedly from PGS expectation and test enrichment for rare (MAF <0.1%) pLoF and damaging missense variants. In UK Biobank Europeans they replicate enrichments for canonical genes (e.g., ACAN, IGF1, APOB, LDLR) and identify novel exome-wide associations including COPB2, GORAB, KANK1, and ACSL6. Disease analyses support a liability-threshold model: T2D cases with HNF1A/HNF4A pLoFs had lower PRS, and CAD controls with protective ANGPTL3 variants had higher PRS. Misalignment classification helps prioritize individuals for rare-variant screening and can reveal pathogenic or protective genetic contributors. Conclusion:Deviation from polygenic expectation highlights individuals enriched for rare damaging variants, supporting a liability-threshold model where rare and common variants counteract or augment each other and offering a strategy to prioritize rare-disease genetic discovery. Music:Enjoy the music based on this article at the end of the episode. Article title:Individuals who deviate from polygenic expectation are enriched for damaging variants in genes linked to rare disease First author:Baya N Journal:The American Journal of Human Genetics 113, 1–19 (2026) DOI:10.1016/j.ajhg.2026.05.013 Reference:Baya N.A., Lassen F.H., Hill B., Venkatesh S.S., Currant H., Lindgren C.M., Palmer D.S., Individuals who deviate from polygenic expectation are enriched for damaging variants in genes linked to rare disease, The American Journal of Human Genetics 113, 1–19 (2026). doi:10.1016/j.ajhg.2026.05.013 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 Official website https://basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/polygenic-misalignment-rare-variants QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-06-25. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript sections describing the misalignment framework, continuous-trait enrichments (height-related ACAN/IGF1, FBN1 for tall stature, LDL-C genes), BMD findings (COPB2/GORAB), LDL-C/HDL gene burdens (LDLR/APOB/PCSK9), dichotomous-trait results (T2D with HNF1A/HNF4A, CAD ANGPTL3), exome-wide discovery (7- transcript topics: Phenotypic misalignment framework and liability-threshold model; Continuous-trait misalignment analyses (height, LDL-C, BMI, BMD, HbA1c, IOP, age at menopause); Canonical gene enrichment for height and LDL-C (ACAN, IGF1, SHOX; LDLR, APOB, PCSK9); Damaging variant enrichment in FBN1 for height misalignment (taller-than-expected); Exome-wide discovery of misalignment genes (KANK1, ACSL6, NPL, COPB2, GORAB); Dichotomous-trait misalignment (T2D/HNF1A/HNF4A; CAD/ANGPTL3; OP) QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 6- claims flagge... Chapters (00:00:20) - What happens when your genetic destiny defies the odds?(00:02:51) - Polygenic scores: The financial(00:05:21) - Seeking rare genetic mutations in heart disease(00:09:48) - The genetic risk of heart disease(00:13:14) - Genetic misalignment: The future of disease triage

Fluri R et al., The American Journal of Human Genetics - This episode examines a cohort study of 16 individuals with de novo LDB1 variants that reveals two overlapping but distinct neurodevelopmental phenotypes tied to variant location. Functional assays and Drosophila models demonstrate loss-of-function effects for N-terminal variants and dominant-negative effects for C-terminal variants. Key terms: LDB1, neurodevelopmental disorder, ventriculomegaly, dominant-negative, haploinsufficiency. Study Highlights:The authors assembled 16 individuals with de novo LDB1 variants and mapped variants to the N-terminal dimerization domain or the C-terminal LIM interaction domain. In vitro assays showed N-terminal missense variants disrupt homodimerization leading to loss of function, while C-terminal variants impair LHX2 binding and act in a dominant-negative manner. Drosophila knockdown and overexpression corroborated dosage sensitivity and distinct in vivo effects, including rescue by wild-type LDB1 and worsening by C-terminal variants. Clinically, C-terminal LID-affecting variants associate with congenital ventriculomegaly and more frequent extra‑neural anomalies, whereas N-terminal variants tend to cause variable NDD without consistent brain malformations. Conclusion:Variant location in LDB1 predicts distinct pathomechanisms and overlapping clinical presentations: N-terminal variants cause haploinsufficiency/loss of function, while C-terminal LID variants act dominant-negatively and are linked to ventriculomegaly and broader organ involvement. Music:Enjoy the music based on this article at the end of the episode. Article title:De novo variants in LDB1 are linked to distinct neurodevelopmental phenotypes determined by variant location and differing pathomechanisms First author:Fluri R Journal:The American Journal of Human Genetics DOI:10.1016/j.ajhg.2026.05.012 Reference:Fluri R., Coll-Tané M., Brunet T., et al. De novo variants in LDB1 are linked to distinct neurodevelopmental phenotypes determined by variant location and differing pathomechanisms. The American Journal of Human Genetics. 2026;113:1–15. doi:10.1016/j.ajhg.2026.05.012 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 Official website https://basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/ldb1-variant-location-pathomechanisms QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-06-23. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited sections describing LDB1 structure (DD and LID), variant spectrum (N-terminal vs C-terminal), two mechanisms (haploinsufficiency vs dominant-negative), cellular assays (protein levels, ubiquitination, aggregates), LDB1-LHX2 interactions, Drosophila chi model (dosage sensitivity, rescue/toxicity, sleep), and cli- transcript topics: LDB1 structure and domains (DD and LID); Variant spectrum across LDB1 (N-terminal vs C-terminal); Mechanisms: haploinsufficiency and dominant-negative effects; Cellular assays: protein stability, ubiquitination, aggregates; LDB1 interactions: dimerization and LHX2 binding; Drosophila model chi (chip) dosage sensitivity and experiments QC Summary:- factual score: 9/10- metadata score: 10/10- supported core claims: 7- claims flagged for review: 1<... Chapters (00:00:20) - Beyond the genetic blueprint of neurodevelopmental disorders(00:02:51) - Common mutations in the LDB1 gene cause congenital ventric(00:08:42) - Mutations in the LDB1 gene cause severe brain dysfunction(00:14:24) - C terminal variant causes sleep disorders in flies

Mastrorosa F et al., The American Journal of Human Genetics - Long-read assemblies and epigenetic mapping of chromosome 21 centromeres in families with trisomy 21 reveal centromere size diversity, two cases of extreme maternal centromere size asymmetry, and no global enrichment of small centromeres in affected individuals. Key terms: trisomy 21, centromere, alpha-satellite, long-read sequencing, meiotic nondisjunction. Study Highlights:Using PacBio HiFi and ultra-long ONT reads with hybrid assembly and DiMeLo-seq, the authors fully resolved chr21 centromeres in eight T21 individuals and several parents and compared them to 287 population haplotypes. Small centromeres were not overall enriched in T21 cases, contradicting earlier reports, but two families showed extreme (>10-fold) maternal centromere size asymmetry. CDRs and CENP-A/CENP-C signals were present across haplotypes and methylation profiles were largely conserved between generations and sample types. Phylogenetic analysis indicates recent rapid evolution of chr21 centromere haplotypes that may facilitate such asymmetry. Conclusion:Centromere size alone does not explain trisomy 21 risk at the population level, but extreme maternal centromere size asymmetry appears in a minority of families and may contribute to nondisjunction in those cases. Music:Enjoy the music based on this article at the end of the episode. Article title:Complete chromosome 21 centromere sequencing of families with Down syndrome First author:Mastrorosa F Journal:The American Journal of Human Genetics DOI:10.1016/j.ajhg.2026.05.010 Reference:Mastrorosa F.K., Daponte A., de Gennaro L., et al. Complete chromosome 21 centromere sequencing of families with Down syndrome. The American Journal of Human Genetics. 113, 1–18 (2026). https://doi.org/10.1016/j.ajhg.2026.05.010 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 Official website https://basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/chr21-centromere-sequencing-down-syndrome QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-06-23. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited transcript sections covering centromere structure, long-read sequencing workflow, extreme centromere size asymmetry findings, CpG/epigenetic mapping (CDRs, CENP-A/CENP-C), and population/evolutionary context.- transcript topics: Centromere structure and alpha-satellite HOR arrays; Maternal nondisjunction and Down syndrome etiology; Long-read sequencing technologies and hybrid phasing; Epigenetic centromere mapping (CDRs, CENP-A/CENP-C, CpG methylation); Centromere size asymmetry in Down syndrome families; Population diversity of chr21 centromeres (African ancestry four-mer HOR) QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 7- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- Small chr21 centromeres are not enriched in Down syndrome cases compared with controls (p = 0.72).- Extreme centromere size asymmetry (>10-fold) observed in two Down syndrome families (e.g., 10.7-fold... Chapters (00:00:20) - Down Syndrome: The mystery of the cell division(00:04:45) - Down Syndrome: The repetitive DNA handles(00:09:49) - Down Syndrome: The tug of war(00:14:16) - The genetics of trisomy 21(00:15:58) - Down Syndrome: The mystery of the genetic cause(00:20:13) - A Single Link in the Code

Shi Z et al., The American Journal of Human Genetics - A large GWAS meta-analysis across five biobanks (8,969 cases, 1,962,542 controls) identifies five genome-wide significant loci for Ménière disease, implicating developmental regulators EYA1/EYA4 and retinoic acid metabolism genes including CYP26A1. Integrative fine-mapping, eQTL, and single-cell expression place these signals in inner ear cell types and link MD to related sensory and neurological traits. Key terms: Ménière disease, EYA1, EYA4, retinoic acid, GWAS. Study Highlights:A GWAS meta-analysis of 8,969 Ménière disease cases and 1,962,542 controls across five biobanks identified five independent genome-wide significant loci, including two signals each at EYA4 and EYA1 and one near CYP26A1. Observed-scale SNP heritability was estimated at 7% (SE 0.8%), indicating a modest contribution of common variation. Fine-mapping, eQTL and single-cell expression data implicate dysregulation of inner ear developmental regulators and retinoic acid metabolism. Phenome-wide and genetic-correlation analyses reveal shared architecture with vertigo, tinnitus, hearing loss, migraine, and sleep apnea. Conclusion:Regulatory common variants in genes governing inner ear development (EYA1, EYA4) and retinoic acid signaling (CYP26A1/C1, ALDH1A2) contribute to Ménière disease risk, providing a genetic framework for functional follow-up and polygenic risk modeling. Music:Enjoy the music based on this article at the end of the episode. Article title:Genome-wide analysis implicates inner ear development in Ménière disease First author:Shi Z Journal:The American Journal of Human Genetics DOI:10.1016/j.ajhg.2026.05.011 Reference:Shi Z, Mandla R, Li J, et al. Genome-wide analysis implicates inner ear development in Ménière disease. The American Journal of Human Genetics. 2026;113:1–12. https://doi.org/10.1016/j.ajhg.2026.05.011 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 Official website https://basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/base-by-base-399-meniere-inner-ear QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-06-22. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Substantive audit of the transcript's representation of GWAS scale, loci and genes (EYA4, EYA1, CYP26A1, ALDH1A2, LMO4), developmental/retinoic acid pathways, genetic correlations, limitations, and future directions as reported in the canonical article.- transcript topics: Genome-wide association study scale and meta-analysis across five biobanks; Identification of five independent signals: two at EYA4, two at EYA1, one near CYP26A1; EYA4 and EYA1 as developmental regulators of inner ear; Regulatory vs coding variants and gene expression implications; Retinoic acid signaling pathway involvement: CYP26A1/C1 and ALDH1A2; LMO4 as a suggestive signal and its developmental context QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 7- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- MD SNP-based heritability estimated at 7% (SE 0.8%) on the observ... Chapters (00:00:20) - The genetic basis of Meniere disease(00:02:04) - Scientists solve the genetic mystery of Meniere's disease(00:06:35) - The genetic heritability of Meniere's(00:10:18) - Genetics of Meniere's Disease and gl(00:15:35) - Genetic determinants of Meniere's

Snyder J et al., Proceedings of the National Academy of Sciences (PNAS) - Longitudinal VAF measurements from 67 JAK2V617F-positive participants in the Danish GESUS study were analyzed with a Moran-process stem cell model and ABC-SMC to infer per-individual self-renewal advantages and assess prognostic value for MPN progression. Key terms: JAK2V617F, clonal hematopoiesis, Moran model, myeloproliferative neoplasms, mathematical modeling. Study Highlights:The study follows 67 individuals from the GESUS cohort with >1% JAK2V617F VAF and multiple follow-up measurements over >10 years. A Moran-process model at the HSC level fitted by ABC-SMC reproduced longitudinal VAF trajectories for 66 of 67 subjects and yielded per-individual estimates of the mutant self-renewal advantage s. Results show heterogeneity: ~70% of subjects had a statistically positive s, ~18% had a negative s, and ~12% were neutral, indicating many carriers show no expansion or even contraction. The fitted model can predict future VAF evolution for most subjects but s alone is not a perfect predictor of MPN diagnosis. Conclusion:A stem-cell Moran-process model explains longitudinal JAK2V617F VAF dynamics in most GESUS participants; inferred selective advantage varies widely, correlates with—but does not fully predict—MPN diagnosis, supporting individualized monitoring and further study of non-VAF risk factors. Music:Enjoy the music based on this article at the end of the episode. Article title:Mathematical modeling of JAK2V617F clonal expansion in a general population cohort First author:Snyder J Journal:Proceedings of the National Academy of Sciences (PNAS) DOI:10.1073/pnas.2507773123 Reference:Snyder J, Andersen M, Gudmand-Høyer J, et al. Mathematical modeling of JAK2V617F clonal expansion in a general population cohort. Proc Natl Acad Sci U.S.A. 2026;123:e2507773123. doi:10.1073/pnas.2507773123 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 Official website https://basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/base398-jak2v617f-moran QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-06-21. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Substantively audited sections include background on JAK2V617F and MPN, Moran process model with carrying capacity and generation time, ABC-SMC inference of per-subject s, results breakdown (positive/neutral/negative s and 66/67 fit), link between s and MPN progression, inflammation/CRP and statin discussion, and limit- transcript topics: JAK2V617F mutation and myeloproliferative neoplasms biology; Moran process model and stem cell carrying capacity; Inference of per-individual selective advantage (s) via ABC-SMC; VAF trajectories across individuals and fit to the model; Association between s and progression to MPN; imperfect prediction; Inflammation (CRP) and statins as modifiers of clonal dynamics QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 8- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- 67 individuals with >1% JAK2V617F VAF in... Chapters (00:00:00) - Can Your Body Naturally Suppress a Cancer Mutation?(00:05:30) - The genetics of JAK2 cancer(00:10:47) - The Stochastic Selection of MPN(00:16:05) - JAK2 mutation and the immune system

Seidel et al., Nature Communications - SciPhy is a BEAST2-integrated Bayesian framework that models sequential CRISPR‑based insertion edits to jointly infer time-scaled single-cell lineage trees, editing dynamics, and population growth. The authors validate SciPhy on simulations and apply it to HEK293T monoclonal expansion and murine gastruloid datasets, showing improved tree and branch-length inference relative to UPGMA and enabling phylodynamic estimates of growth. Key terms: Bayesian phylogenetics, lineage tracing, CRISPR, DNA Typewriter, phylodynamics. Study Highlights:SciPhy implements a mechanistic model of ordered, irreversible insertions with per-tape clock rates and insertion probabilities and computes the likelihood using a pruning algorithm within BEAST2. Validation on calibrated simulations shows correct posterior coverage and high correlations between true and inferred editing and tree parameters. Application to HEK293T and gastruloid data recovers per-tape edit rates and preferential insert probabilities, infers growth rates including time-varying dynamics in gastruloid development, and yields more accurate topologies and branch lengths than UPGMA. The framework reports uncertainty and enables joint phylodynamic analysis of lineage tracing data. Conclusion:A mechanistic, order-aware Bayesian model for sequential genome-editing lineage recorders improves reconstruction of time-calibrated cell lineage trees, quantifies editing biases and clock rates, and enables inference of cell population dynamics from single-cell lineage tracing data. Music:Enjoy the music based on this article at the end of the episode. Article title:SciPhy: A Bayesian phylogenetic framework using sequential genetic lineage tracing data First author:Seidel Journal:Nature Communications DOI:10.1038/s41467-026-73377-6 Reference:Seidel, S., Zwaans, A., Regalado, S. et al. SciPhy: A Bayesian phylogenetic framework using sequential genetic lineage tracing data. Nat Commun (2026). https://doi.org/10.1038/s41467-026-73377-6 License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 Official website https://basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/sciphy-bayesian-lineage-tracing QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-06-20. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Substantive auditing of the transcript's description of SciPhy's mechanistic model (ordered CRISPR edits), BEAST2 implementation, validation results, HEK293T monoclonal expansion, gastruloid development with CHIR treatment, and discussed limitations and computational considerations.- transcript topics: Mechanistic editing model with ordered inserts; BEAST2 integration and likelihood calculation; Editing rate clock rates and insertion probabilities; Validation: in-silico, HEK293T monoclonal expansion; Insertion bias: CAT vs GCG; Growth dynamics and phylodynamic inference QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 7- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- SciPhy is a Bayesian framewor...

Stannard A et al., Proceedings of the National Academy of Sciences (PNAS) - This episode summarizes a PNAS study that uses a FRET-responsive DNA tweezers nanosensor to detect and quantify sequence-dependent interactions between intact double-stranded DNA duplexes in ionic solutions. Key terms: homologous recognition, double-stranded DNA, electrostatic interactions, DNA nanosensor, divalent cations. Study Highlights:Using a tuned DNA-tweezers FRET assay, the authors show that homologous dsDNA duplexes coalign more readily than heterologous ones in the presence of divalent cations. They quantify a homologous recognition free energy of roughly −0.02 kBT (≈ −0.01 kcal/mol) per base pair and show this is largely independent of Mg2+ versus Ca2+ within the tested range. Controls exclude strand exchange and sequence-specific ion adsorption as alternative explanations. An electrostatic helical coherence model reproduces the magnitude and salt dependence of the measured effect. Conclusion:Protein-free, sequence-specific electrostatic interactions between intact dsDNA can produce a small but measurable homology recognition energy consistent with helical coherence theory and relevant under confined, DNA-rich conditions. Music:Enjoy the music based on this article at the end of the episode. Article title:Direct evidence and quantification of homologous recognition between DNA duplexes First author:Stannard A Journal:Proceedings of the National Academy of Sciences (PNAS) DOI:10.1073/pnas.2530949123 Reference:Stannard A., Haimov E., Hedley J.G., et al. Direct evidence and quantification of homologous recognition between DNA duplexes. Proc. Natl. Acad. Sci. U.S.A. 2026; doi:10.1073/pnas.2530949123. License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 Official website https://basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/homologous-dna-recognition-396 QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-06-18. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited the transcript portions describing the DNA tweezers design and readout, cation dependence, homologous vs heterologous comparison, longer-duplex effects, strand-exchange controls, helical-coherence theory, and cellular relevance.- transcript topics: DNA tweezers design and FRET readout; Monovalent vs divalent cation effects on duplex coalignment; Homologous versus heterologous sequence comparisons; Strand-exchange controls and GC clamps; Length dependence: 36 bp vs 68 bp and entropic effects; Helical coherence theory mechanism and charge patterning QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 7- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- Direct evidence for homologous recognition between intact dsDNA in protein-free ionic conditions.- Recognition energy per base pair is about -0.02 kBT (≈ -0.01 kcal/mol per base pair).- Recognition is largely independent of whether Mg2+ or Ca2+ is the divalent cation and of their concentration within tested range.- Divalent cations promote coalignme...

Green R et al., PNAS - Collating >100,000 base-pair substitutions from 32 mutation-accumulation experiments, this study shows that sequence context well beyond adjacent bases — up to ±6 bp and even hundreds of bp — shapes mutational biases in E. coli and interacts with DNA repair. Key terms: mutational bias, sequence context, Escherichia coli, mismatch repair, mononucleotide runs. Study Highlights:The authors analyzed 117,807 base-pair substitutions from 32 MA experiments and quantified nucleotide frequencies up to ±6 bp (and sliding windows to 1,000 bp) around mutation sites. Extended context effects vary by substitution type, DNA repair background (proofreading and MMR), and replication strand. Mononucleotide runs (notably AC3+ and GC3+) are strong hotspots consistent with transient misalignment; GC3+ can increase G:C→C:G transversions by orders of magnitude. Broader GC% biases persist hundreds of base pairs and are modulated by MMR activity. Conclusion:Extended sequence context and its interaction with proofreading, mismatch repair, and replication strand identity create complex, BPS-specific mutational signatures in E. coli, improving the resolution of mutation-rate predictions and highlighting long-range and motif-specific hotspots. Music:Enjoy the music based on this article at the end of the episode. Article title:Extended sequence context shapes mutational bias in Escherichia coli First author:Green R Journal:PNAS DOI:10.1073/pnas.2601345123 Reference:Green R., Jago M.J., Knight C.G., Czernuszka M.R., Denisova S., Krašovec R., Lagator M. Extended sequence context shapes mutational bias in Escherichia coli. PNAS. 2026;123(23):e2601345123. doi:10.1073/pnas.2601345123. License:This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/ Support:Base by Base – Stripe donations: https://donate.stripe.com/7sY4gz71B2sN3RWac5gEg00 Official website https://basebybase.com On PaperCast Base by Base you'll discover the latest in genomics, functional genomics, structural genomics, and proteomics. Episode link: https://basebybase.com/episodes/extended-sequence-context-mutational-bias-e-coli QC:This episode was checked against the original article PDF and publication metadata for the episode release published on 2026-06-18. QC Scope:- article metadata and core scientific claims from the narration- excludes analogies, intro/outro, and music- transcript coverage: Audited sections covering extended sequence context (±6 bp), mononucleotide run hotspots (AC3+, GC3+), GC3+ and G:C→C:G transversions, 5′ preceding nucleotide effects, leading vs lagging strand replication, and GC-content effects up to 1000 bp.- transcript topics: Extended sequence context (±6 bp); Mononucleotide runs and transient misalignment; GC3+ hotspot and other motifs; DNA proofreading and mismatch repair effects; Leading vs lagging strand replication and context biases; Regional GC-content effects up to 1000 bp QC Summary:- factual score: 10/10- metadata score: 10/10- supported core claims: 6- claims flagged for review: 0- metadata checks passed: 4- metadata issues found: 0 Metadata Audited:- article_doi- article_title- article_journal- license Factual Items Audited:- Extended context up to ±6 bp influences mutational bias beyond trinucleotide context- Mononucleotide runs AC3+ and GC3+ are mutational hotspots; GC3+ increases G:C→C:G transversions up to ~10^4-fold- A strong GC3+ hotspot near GG sequences can reach extremely large fold increases; in some backgrounds ~50,000-fold for G:C→C:G transversions at GG C7- 5′ preceding nucleotide...