Detection and Degradation of Stalled Nascent Chains via Ribosome-Associated Quality Control.

Detection and Degradation of Stalled Nascent Chains via Ribosome-Associated Quality Control.
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通过核糖体相关质量控制检测和降解停滞的新生链。

DOI:
10.1146/annurev-biochem-013118-110729
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发表时间:
2020-06-20
影响因子:
16.6
通讯作者:
Brandman O
Brandman O
中科院分区:
生物学1区
文献类型:
--
作者:
Sitron CS;Brandman O

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停滞的蛋白质合成会产生有缺陷的新生链,这些链会伤害细胞。作为回应,细胞通过称为核糖体相关质量控制(RQC)的过程降解这些新生链。在这里,我们回顾了翻译过程中的不规则性,导致核糖体失速以及细胞如何使用RQC检测失速的核糖体,泛素化其拴系新生链,并提供泛素化新生链的蛋白酶体。我们还总结了细胞如何响应RQC失败。
Stalled protein synthesis produces defective nascent chains that can harm cells. In response, cells degrade these nascent chains via a process called ribosome-associated quality control (RQC). Here, we review the irregularities in the translation process that cause ribosomes to stall as well as how cells use RQC to detect stalled ribosomes, ubiquitylate their tethered nascent chains, and deliver the ubiquitylated nascent chains to the proteasome. We additionally summarize how cells respond to RQC failure.
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