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ER protein quality control and proteasome-mediated protein degradation

机译:内质网蛋白质量控制和蛋白酶体介导的蛋白降解

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摘要

A variety of mutant polypeptides that are associated with human disease are targeted for degradation by an endoplasmic reticulum (ER) quality control system. In addition, physiological signals and viral gene products can target the degradation of several ER resident proteins and secreted proteins passing through the ER. Although the mechanism of protein quality control and the site of degradation were obscure, recent data indicate that degradation requires the cytosolic proteasome. Biochemical and genetic analyses have indicated that both lumenal and integral membrane proteins are selected for proteolysis and exported to the cytosol by a process that in several cases requires ER-associated molecular chaperones.
机译:内质网(ER)质量控制系统可靶向降解与人类疾病相关的多种突变多肽。另外,生理信号和病毒基因产物可以靶向几种内质网驻留蛋白和通过内质网的分泌蛋白的降解。尽管蛋白质质量控​​制的机制和降解位点不清楚,但最近的数据表明降解需要胞质蛋白酶体。生化和遗传分析表明,腔蛋白和整合膜蛋白均被选择进行蛋白水解,并通过一种在某些情况下需要与ER相关的分子伴侣的过程而输出到细胞质中。

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