Hsp90α形成了凝结体,与RG动机重复的客户端蛋白进行接触
Jiaojiao Hu1,2, Hui Dong1,2, Yichen Li3
1Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences Shanghai 201210 China hujj@sioc.ac.cn liulab@sioc.ac.cn.
Chemical science
|July 12, 2024
概括
热冲击蛋白90α (Hsp90α) 形成动态凝聚物,与无膜有机细胞 (MLOs) 关键的客户端蛋白相互作用. 这个陪伴者.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 热冲击蛋白90α (Hsp90α) 是一个关键的陪伴者,参与蛋白质平衡,染色质重塑和细胞生长.
- 新出现的证据表明,Hsp90α参与调节无膜有机体 (MLO),如应力颗粒和处理体.
研究的目的:
- 为了研究Hsp90α在体外形成凝结物的固有能力.
- 为了确定优先集成到Hsp90α凝聚剂的客户端蛋白质.
- 阐明驱动Hsp90α凝结的机制及其与MLO相关蛋白的相互作用.
主要方法:
- 在体外凝结物形成的测试.
- 液体染色学-并联质谱学 (LC-MS/MS) 用于对Hsp90α凝聚物的蛋白质组分析.
- 蛋白质域和残留物质的分析驱动相位分离.
- 包括客户端蛋白和重复动机来评估凝结物动态.
主要成果:
- Hsp90α表现出内在相位分离能力,在体外形成动态凝结物.
- LC-MS/MS确定了许多蛋白质,特别是那些与MLOs相关的RG动机的蛋白质,这些蛋白质与Hsp90α凝结物相关.
- Hsp90α的所有三个域都参与相分离,由溶剂暴露的负电荷和多价值电静相互作用驱动.
- 客户端蛋白质 (例如TDP-43,hnRNPA1) 和二重复 (多GR,PR) 调节Hsp90α凝聚物的动态.
结论:
- Hsp90α可以形成动态凝聚物,这表明它在调节MLO方面发挥了直接作用.
- Hsp90α凝聚物的相互作用网络包括具有RG动机的蛋白质,突出其在MLO组成中的作用.
- 由带电残留物介导的静电相互作用对Hsp90α凝结至关重要.
- Hsp90α在与各种客户互动和调节各种MLO方面表现出功能性适应性.
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