The role of ubiquitin and the 26S proteasome in plant abiotic stress signaling.
The role of ubiquitin and the 26S proteasome in plant abiotic stress signaling.
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DOI：
10.3389/fpls.2014.00135
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发表时间：
2014
影响因子：
5.6
通讯作者：
Stone SL
中科院分区：
文献类型：
--
作者：
Stone SL
泛素是一种小的、高度保守的、广泛表达的真核蛋白，具有极其重要和多样的调节功能。泛素的一个被广泛研究的功能是它在泛素-蛋白酶体系统(UPS)选择性蛋白分解中的作用。UPS已成为植物应对干旱、盐碱、寒冷和营养匮乏等环境压力的不可或缺的参与者。UPS还被证明影响与压力相关的激素的产生和信号转导，如脱落酸。对UPS功能的了解主要集中在确定E3泛素连接酶的作用上，E3泛素连接酶是泛素化途径的底物招募组件。最近发现的胁迫信号/调节蛋白是泛素依赖降解的主题，这增加了我们对UPS如何促进对不利环境条件的反应的了解。简要概述了UPS在非生物胁迫信号转导过程中调节蛋白质稳定性的作用。E3泛素连接酶的应激相关底物蛋白已被发现进行了讨论。
Ubiquitin is a small, highly conserved, ubiquitously expressed eukaryotic protein with immensely important and diverse regulatory functions. A well-studied function of ubiquitin is its role in selective proteolysis by the ubiquitin-proteasome system (UPS). The UPS has emerged as an integral player in plant response and adaptation to environmental stresses such as drought, salinity, cold and nutrient deprivation. The UPS has also been shown to influence the production and signal transduction of stress-related hormones such as abscisic acid. Understanding UPS function has centered mainly on defining the role of E3 ubiquitin ligases, which are the substrate-recruiting component of the ubiquitination pathway. The recent identification of stress signaling/regulatory proteins that are the subject of ubiquitin-dependent degradation has increased our knowledge of how the UPS facilitates responses to adverse environmental conditions. A brief overview is provided on role of the UPS in modulating protein stability during abiotic stress signaling. E3 ubiquitin ligases for which stress-related substrate proteins have been identified are discussed.
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