植物泛素化系统  

The Ubiquitination System in Plants

作　　者：杜秋丽[1] 李莉 

机构地区：[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

出　　处：《济宁学院学报》2011年第3期52-55,共4页Journal of Jining University

基　　金：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)

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.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.

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 

分 类 号：Q51[生物学—生物化学]