The activities of the E3 ubiquitin ligase COP1/SPA, a key repressor in light signaling

被引：192
作者：
Hoecker, Ute [1 ]
机构：
[1] Univ Cologne, Bot Inst & Cluster Excellence Plant Sci CEPLAS, Bioctr, Zulpicher Str 47b, D-50674 Cologne, Germany
来源：
CURRENT OPINION IN PLANT BIOLOGY | 2017年 / 37卷
关键词：
SPA PROTEINS; BLUE-LIGHT; DEPENDENT INTERACTION; ARABIDOPSIS COP1; CONSTITUTIVE PHOTOMORPHOGENIC1; GENE-EXPRESSION; FLOWERING TIME; CRYPTOCHROME; REPEAT DOMAIN; RED-LIGHT;
D O I：
10.1016/j.pbi.2017.03.015
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
Light is a critical signal to integrate plant growth and development with the environment. Downstream of photoreceptors, the E3 ubiquitin ligase COP1/SPA is a key repressor of photomorphogenesis which targets many positive regulators of light signaling, mainly transcription factors, for degradation in darkness. In light-grown plants COP1/SPA activity is repressed, allowing light responses to occur. This review provides an overview on our current knowledge on COP1/SPA repressor function, focusing in particular on the roles of the respective protein domains and the mechanisms of light-induced inactivation of COP1/SPA. Moreover, we summarize how COP1 activity is regulated by other interacting proteins, such as a SUMO E3 ligase and Phytochrome-Interacting Factors (PIFs), as well as by hormones. At last, several novel functions of COP1 that were recently revealed are included.
引用
收藏
页码：63 / 69
页数：7
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