702-mTORC2识别并磷酸化Akt的结构基础 episode artwork

EPISODE · Mar 27, 2026 · 22 MIN

702-mTORC2识别并磷酸化Akt的结构基础

from 聊聊Sci

这项研究通过蛋白质化学合成与冷冻电子显微镜技术,揭示了mTORC2复合体精准识别并磷酸化Akt激酶的分子机制。研究人员设计出一种名为Akt-Torin的半合成双底物探针,成功捕捉到了瞬时且不稳定的mTORC2-Akt结合状态。结构分析表明,mTORC2并非通过局部的线性序列,而是利用mSin1亚基上的两个远程位点(CRIM结构域和N-mooring区域)来锚定Akt激酶结构域的特定表面。这种三维空间上的双界面对接模式不仅解释了mTORC2对Akt、PKC等底物的选择性,还阐明了其直接催化疏水基团(Ser473)和转向基团(Thr450)磷酸化的过程。这些发现为开发针对性抑制mTORC2活性、治疗癌症及糖尿病的新型药物提供了重要的结构基础。References:* Taylor M S, Chen M, Hancock M, et al. Structural basis for the...去小宇宙查看完整单集简介前往小宇宙评论区与主播互动

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702-mTORC2识别并磷酸化Akt的结构基础

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This episode was published on March 27, 2026.

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这项研究通过蛋白质化学合成与冷冻电子显微镜技术,揭示了mTORC2复合体精准识别并磷酸化Akt激酶的分子机制。研究人员设计出一种名为Akt-Torin的半合成双底物探针,成功捕捉到了瞬时且不稳定的mTORC2-Akt结合状态。结构分析表明,mTORC2并非通过局部的线性序列,而是利用mSin1亚基上的两个远程位点(CRIM结构域和N-mooring区域)来锚定Akt激酶结构域的特定表面。这种三维空间上的双界面对接模式不仅解释了mTORC2对Akt、PKC等底物的选择性,还阐明了其直接催化疏水基团...

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