Crosstalk Between Mammalian Autophagy and the Ubiquitin-Proteasome System.

Crosstalk Between Mammalian Autophagy and the Ubiquitin-Proteasome System.
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DOI:
10.3389/fcell.2018.00128
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发表时间:
2018
影响因子:
5.5
通讯作者:
Gozuacik D
Gozuacik D
中科院分区:
生物学2区
文献类型:
--
作者:
Kocaturk NM;Gozuacik D

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自噬和泛素-蛋白酶体系统(UPS)是真核生物中两种主要的细胞内质量控制和循环机制,负责细胞内的动态平衡。两个系统都利用泛素化作为降解信号,然而,不同的机制在起作用。UPS负责降解短寿命的蛋白质和可溶的错误折叠的蛋白质,而自噬则消除长寿命的蛋白质、不可溶的蛋白质聚集体,甚至整个细胞器(例如线粒体、过氧化物体)和细胞内的寄生虫(例如细菌)。UPS和选择性自噬都是通过泛素标签识别目标的。除了这两个系统之间通过泛素化蛋白的间接联系外,最近的数据表明,这些降解途径之间存在联系和相互调节机制。在这篇综述中,我们总结了自噬和UPS之间的直接和间接的相互作用和串扰,以及它们对细胞应激反应和动态平衡的影响。
Autophagy and the ubiquitin–proteasome system (UPS) are the two major intracellular quality control and recycling mechanisms that are responsible for cellular homeostasis in eukaryotes. Ubiquitylation is utilized as a degradation signal by both systems, yet, different mechanisms are in play. The UPS is responsible for the degradation of short-lived proteins and soluble misfolded proteins whereas autophagy eliminates long-lived proteins, insoluble protein aggregates and even whole organelles (e.g., mitochondria, peroxisomes) and intracellular parasites (e.g., bacteria). Both the UPS and selective autophagy recognize their targets through their ubiquitin tags. In addition to an indirect connection between the two systems through ubiquitylated proteins, recent data indicate the presence of connections and reciprocal regulation mechanisms between these degradation pathways. In this review, we summarize these direct and indirect interactions and crosstalks between autophagy and the UPS, and their implications for cellular stress responses and homeostasis.
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