试素立体探测器的研制确定了GRPEL1-HSPA9 Chaperone复合体的抑制剂
Rachel E Hayward1, Raymond F Berkeley1, Zijian Gao2
1Department of Chemistry, Scripps Research, La Jolla, CA, USA.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
试烯胺立体探测器可以准非正极蛋白位点,改变细胞功能. 对这些探头的修改揭示了新的相互作用和潜在的治疗点,比如线粒体HSP70陪伴系统.
科学领域:
- 化学生物学 化学生物学
- 分子细胞生物学 分子细胞生物学
背景情况:
- 基于活动的蛋白质分析 (ABPP) 使用电友化合物 (立体探针) 来识别蛋白质标.
- 了解立体样样蛋白相互作用的结构-活性关系至关重要,但人们对其了解甚少.
研究的目的:
- 调查三烯胺固态试验物的结构修改如何影响它们的蛋白质相互作用.
- 描述这些相互作用的结合部位和功能后果.
主要方法:
- 合成并利用具有不同结构的烯胺三胺立体探测器.
- 采用基于活动的蛋白质分析来识别蛋白质标.
- 使用机器学习模型 (Boltz-2) 来预测绑定站点.
- 评估了对线粒体蛋白质进口和线粒体细胞衰变的功能影响.
主要成果:
- 立体试验相互作用对反应组远端的修改敏感.
- 大多数结合发生在非正经位点,经常错过了博尔茨-2模型 ("正经性燃烧").
- 针对GRPEL1中的C124的立体探针破坏了HSPA9/mortalin相互作用,损害了线粒体蛋白质进口并诱导了线粒细胞衰变.
结论:
- 烯胺是多功能共价联结体,用于非正统蛋白位点.
- 这些探头可以用作工具化合物来扰乱伴侣系统,例如线粒体HSP70.0.
- 了解远端修饰是设计特定的共价抑制剂的关键.
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