Direct interaction of Arabidopsis cryptochromes with COP1 in light control development

被引:402
作者
Wang, HY
Ma, LG
Li, JM
Zhao, HY
Deng, XW [1 ]
机构
[1] Yale Univ, Dept Mol Cellular & Dev Biol, New Haven, CT 06520 USA
[2] Beijing Univ, Coll Life Sci, Peking Yale Joint Ctr Plant Mol Genet & Agrobiote, Beijing 100871, Peoples R China
[3] Yale Univ, Sch Med, Dept Epidemiol & Publ Hlth, New Haven, CT 06520 USA
关键词
D O I
10.1126/science.1063630
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Arabidopsis seedling photomorphogenesis involves two antagonistically acting components, COP1 and HY5. COP1 specifically targets HY5 for degradation via the 26S proteasome in the dark through their direct physical interaction. Little is known regarding how light signals perceived by photoreceptors are transduced to regulate COP1. Arabidopsis has two related cryptochromes (cry1 and cry2) mediating various blue/ultraviolet-A light responses. Here we show that both photoactivated cryptochromes repress COP1 activity through a direct protein-protein contact and that this direct regulation is primarily responsible for the cryptochrome-mediated blue light regulation of seedling photomorphogenic development and genome expression profile.
引用
收藏
页码:154 / 158
页数:5
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