The F-box protein FKF1 inhibits dimerization of COP1 in the control of photoperiodic flowering.
The F-box protein FKF1 inhibits dimerization of COP1 in the control of photoperiodic flowering.
复制标题
DOI:
10.1038/s41467-017-02476-2
复制
发表时间:
2017-12-22
影响因子:
16.6
通讯作者:
Paek NC
中科院分区:
文献类型:
--
作者:
Lee BD;Kim MR;Kang MY;Cha JY;Han SH;Nawkar GM;Sakuraba Y;Lee SY;Imaizumi T;McClung CR;Kim WY;Paek NC
In Arabidopsis thaliana, CONSTANS (CO) plays an essential role in the regulation of photoperiodic flowering under long-day conditions. CO protein is stable only in the afternoon of long days, when it induces the expression of FLOWERING LOCUS T (FT), which promotes flowering. The blue-light photoreceptor FLAVIN-BINDING, KELCH REPEAT, F-BOX1 (FKF1) interacts with CO and stabilizes it by an unknown mechanism. Here, we provide genetic and biochemical evidence that FKF1 inhibits CONSTITUTIVE PHOTOMORPHOGENIC1 (COP1)-dependent CO degradation. Light-activated FKF1 has no apparent effect on COP1 stability but can interact with and negatively regulate COP1. We show that FKF1 can inhibit COP1 homo-dimerization. Mutation of the coiled-coil domain in COP1, which prevents dimer formation, impairs COP1 function in coordinating flowering time. Based on these results, we propose a model whereby the light- and day length-dependent interaction between FKF1 and COP1 controls CO stability to regulate flowering time. CONSTANS promotes flowering under long-day conditions in Arabidopsis but is rapidly degraded in short-day conditions. Here the authors show that the blue-light photoreceptor FKF1 can interact with the E3 ligase COP1 in a light-dependent manner and prevent degradation of CO in long-day conditions.
登录
查看更多内容
影响因子:
9.5
作者:
Imaizumi, Takato
通讯作者:
Imaizumi, Takato
影响因子:
64.8
作者:
Dacke, M;Nilsson, DE;Warrant, EJ
通讯作者:
Warrant, EJ
影响因子:
10.5
作者:
Lee, Jeong Hwan;Yoo, Seong Jeon;Ahn, Ji Hoon
通讯作者:
Ahn, Ji Hoon
影响因子:
11.4
作者:
Holm, M;Hardtke, CS;Deng, XW
通讯作者:
Deng, XW
影响因子:
56.9
作者:
Imaizumi, T;Schultz, TF;Kay, SA
通讯作者:
Kay, SA