Recognition and delivery of ERAD substrates to the proteasome and alternative paths for cell survival.

Recognition and delivery of ERAD substrates to the proteasome and alternative paths for cell survival.
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ERAD 底物的识别和递送至蛋白酶体以及细胞存活的替代途径。

DOI:
10.1007/3-540-28007-3_2
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发表时间:
2005
影响因子:
--
通讯作者:
J. Brodsky
J. Brodsky
中科院分区:
医学3区
文献类型:
--
作者:
A. McCracken;J. Brodsky

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内质网相关蛋白降解(ERAD)是一种蛋白质质量控制机制,可以最大限度地减少蛋白质错误折叠在分泌途径中的有害影响。分子伴侣和内质网膜凝集素是这一过程的重要组成部分,因为它们维持未折叠蛋白质的溶解性,并可以将ERAD底物靶向细胞质蛋白酶体。可能还需要其他因素来帮助选择ERAD底物,底物从内质网逆行移位/错位和蛋白酶体靶向需要不同的蛋白质机制。当ERAD机制的能力超过或受损时,可以采用多种降解途径,以防止ERAD底物积累的有害后果,包括细胞死亡和疾病。
Endoplasmic reticulum-associated protein degradation (ERAD) is a protein quality control mechanism that minimizes the detrimental effects of protein misfolding in the secretory pathway. Molecular chaperones and ER lumenal lectins are essential components of this process because they maintain the solubility of unfolded proteins and can target ERAD substrates to the cytoplasmic proteasome. Other factors are likely required to aid in the selection of ERAD substrates, and distinct proteinaceous machineries are required for substrate retrotranslocation/dislocation from the ER and proteasome targeting. When the capacity of the ERAD machinery is exceeded or compromised, multiple degradative routes can be enlisted to prevent the detrimental consequences of ERAD substrate accumulation, which include cell death and disease.
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