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新设计的Hsp70激活器可以溶解细胞内凝聚物

Jason Z Zhang¹, Nathan Greenwood², Jason Hernandez³

¹Department of Biochemistry, University of Washington, Seattle, WA 98195, USA; Institute for Protein Design, University of Washington, Seattle, WA 98195, USA; Howard Hughes Medical Institute, University of Washington, Seattle, WA 98195, USA.

Cell chemical biology

|February 8, 2025

概括

研究人员设计了新的Hsp70结合蛋白来控制蛋白质质量. 这些工程蛋白调节Hsp70活动,有助于蛋白质重新折叠和调节细胞凝聚物,为PQC研究提供了新的工具.

科学领域:

生物化学生化学
分子生物学分子生物学
细胞生物学细胞生物学

背景情况:

蛋白质质量控制 (PQC) 依赖于像Hsp70和J域蛋白 (JDPs/Hsp40s) 这样的护卫者.
据信,JDPs将Hsp70招募到特定的客户端蛋白质中,但潜在的分子机制尚不清楚.

研究的目的:

设计新的Hsp70结合蛋白来调节Hsp70的ATPase活性.
在体外和体内研究工程Hsp70调节器的功能后果.

主要方法:

具有对ATPase活性抑制或刺激作用的Hsp70结合蛋白的新设计.
在体外再折叠试验中,使用变质的光酶进行了检测.
将设计的蛋白质向活细胞中的细胞内凝聚物.

主要成果:

一个ATPase刺激的设计成功地促进了体外变质露西法酶的重新折叠,模仿本地JDPs.
将这种设计针对细胞内凝聚物导致了它们的显著溶解.
该研究揭示了这些凝结物的作用,即促进细胞生长和信号传递的枢纽.

结论:

工程化Hsp70结合蛋白提供了对伴侣结构-功能关系的洞察力.
这些设计提供了一个模块化策略,以准PQC系统和调节细胞凝结物.
这些发现为操纵蛋白质质量控制和细胞组织提供了新的工具.

关键词:

在Hsp70中,它是Hsp70的.陪伴者 (chaperones) 是指一个陪伴者.凝结剂是一种凝结剂.蛋白质设计蛋白质设计

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