853-小鼠卵细胞质晶格的结构解析 episode artwork

EPISODE · Apr 25, 2026 · 24 MIN

853-小鼠卵细胞质晶格的结构解析

from 聊聊Sci

这份发表于杂志的研究,首次通过冷冻电镜技术揭示了小鼠卵子中胞质晶格(CPL)的高分辨率结构。胞质晶格是哺乳动物卵子特有的巨型细胞器,作为一种蛋白质存储仓库,通过高度有序的模块化架构招募并锁存胚胎发育所需的关键母源因子。该结构由PADI6和SCMC复合物构成的外部框架、NLRP4F形成的连接链以及容纳货物的核心组成。研究发现,核心区域通过严密的物理构象将表观遗传调节因子UHRF1、微管蛋白及SCF泛素配体组件限制在失活状态,以确保这些物质在受精后的卵子向胚胎转变过程中能被精准释放并激活。这项成果为理解母源蛋白质稳态、胚胎停滞的分子机制以及诊疗女性不孕症提供了关键的解剖学基础。References: Chi P, Wang X, Li J, et al. Structure of the mouse cytoplasmic lattice[J]. Nature, 2026: 1-3.前往小宇宙评论区与主播互动

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853-小鼠卵细胞质晶格的结构解析

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