VHL瘤抑制剂的折叠和质量控制通过不同的陪伴者途径进行
Amie J McClellan1, Melissa D Scott, Judith Frydman
1Department of Biological Sciences and BioX Program, Stanford University, CA 94305, USA.
Cell
|June 7, 2005
概括
分子陪伴者控制蛋白质的命运. 包括Hsp70和Hsp90在内的明确的伴侣通路管理VHL瘤抑制剂的折叠和降解,揭示了蛋白质质量控制中的层次结构.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 蛋白质折叠和降解的过程
背景情况:
- 分子伴侣辅助蛋白质质量控制的机制尚未完全理解.
- 细胞质蛋白质质量控制对于细胞健康至关重要.
研究的目的:
- 调查VHL瘤抑制器折叠和降解的独特陪伴者要求.
- 阐明在蛋白质分类决策中特定的陪伴路径的作用.
主要方法:
- 对错误折叠的VHL变体的折叠和降解的陪伴者需求的分析.
- 研究了Hsp70,TRiC,Hsp90和HOP/Sti1p的作用.
主要成果:
- 清晰的陪伴路径控制VHL折叠和退化.
- 对于VHL折叠而不是降解,TRiC是必不可少的.
- Hsp90对于VHL降解是必不可少的,但不是折叠.
- HOP/Sti1p可以通过弥合Hsp70和Hsp90.p来调解分类决策.
结论:
- 质量控制需要一个独特的陪伴者综合体.
- 陪伴者积极和具体地参与蛋白质分类决策.
- 伴侣相互作用的等级控制着蛋白质的命运.
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