Mechanisms for quality control of misfolded transmembrane proteins.

Mechanisms for quality control of misfolded transmembrane proteins.
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DOI:
10.1016/j.bbamem.2011.11.007
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发表时间:
2012-04
影响因子:
3.4
通讯作者:
Cyr, Douglas M.
Cyr, Douglas M.
中科院分区:
生物学3区
文献类型:
--
作者:
Houck, Scott A.;Cyr, Douglas M.

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为了防止错误折叠和聚集的蛋白质的积累,细胞已经开发了一个复杂的细胞质量控制(QC)系统网络,以识别错误折叠的蛋白质并促进其重折叠或降解。当对跨膜蛋白进行质量控制时,细胞面临许多障碍。跨膜蛋白在膜的两侧都有结构域,不同隔室中的QC系统必须协调以监测蛋白质的折叠状态。此外,跨膜结构域可以具有非常复杂的组织,并且QC系统必须能够监测跨膜结构域在膜中的组装。本文就错误折叠跨膜蛋白的修复和降解过程中的QC系统进行综述。此外,我们将详细介绍识别跨膜结构域折叠缺陷的因素,以及当错误折叠的跨膜蛋白逃避QC和聚集时会发生什么。
To prevent the accumulation of misfolded and aggregated proteins, the cell has developed a complex network of cellular quality control (QC) systems to recognize misfolded proteins and facilitate their refolding or degradation. The cell faces numerous obstacles when performing quality control on transmembrane proteins. Transmembrane proteins have domains on both sides of a membrane and QC systems in distinct compartments must coordinate to monitor the folding status of the protein. Additionally, transmembrane domains can have very complex organization and QC systems must be able to monitor the assembly of transmembrane domains in the membrane. In this review, we will discuss the QC systems involved in repair and degradation of misfolded transmembrane proteins. Also, we will elaborate on the factors that recognize folding defects of transmembrane domains and what happens when misfolded transmembrane proteins escape QC and aggregate.
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