| 植物泛素化系统 |
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| 引用本文： | 杜秋丽,李莉.植物泛素化系统[J].济宁师范专科学校学报,2011(3):52-55. |
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| 作者姓名： | 杜秋丽 李莉 |
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| 作者单位： | [1]济宁学院生命科学与工程系,山东曲阜273155 [2]济宁市第十二中学,山东济宁272100 |
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| 基金项目： | 与南京农业大学合作项目; 济宁市优秀中青年科研创新资金计划; 济宁学院科研基金项目（2009KJLX07） |
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| 摘 要： | 植物生长发育的许多过程都受到泛素-蛋白酶体途径的调控.泛素-蛋白酶体途径包括两个连续的过程：泛素化系统将底物蛋白泛素化;26s蛋白酶体降解泛素化的靶蛋白.其中泛素化系统对底物的泛素化是通过三种关键酶即泛素活化酶、泛素结合酶和泛素连接酶的连接级联反应完成的.这三类酶通过泛素介导的蛋白质选择性降解参与植物光形态建成、配子体发育、花发育、种子发育、激素的信号转导、抗逆、抗虫等方面的调控.
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| 关 键 词： | 泛素蛋白酶体途径 泛素化系统 E1泛素活化酶 E2泛素结合酶 E3泛素连接酶 |
The Ubiquitination System in Plants |
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| DU Qiuli,LI Li.The Ubiquitination System in Plants[J].Journal of Jining Teachers College,2011(3):52-55. |
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| Authors: | DU Qiuli LI Li |
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| Institution: | 1.Department of Life Science and Engineering,Jining University,Qufu 273155,China; 2.Jining Number 12 Middle School,Jining 272100,China) |
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| Abstract: | Most of the plant growth and development are regulated by the ubiquitin-proteasome pathway.The ubiquitin-proteasome pathway（UPP） consists of two major components： the ubiquitination system attaching a ubiquitin or a polyubiquitin chain to a substrate,and the 26S proteasome responsible for the degradation of protein substrates tagged by the polyubiquitin chain.Ubiquitin attachment is a multistep reaction involving three enzymes referred to as E1（ubiquitin-activating enzyme）,E2（ubiquitin-conjugating enzyme）,and E3（ubiquitin-protein ligase）.Their known biological functions include photomorphogenesis,gametogenesis,floral development,seed development,hormone signaling,responses to biotic and abiotic challenges. |
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| Keywords: | ubiquitin-proteasome pathway ubiquitination system E1 ubiquitin-activating enzyme E2 ubiquitin-conjugating enzyme E3 ubiquitin ligase |
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