Direct photoresponsive inhibition of a p53-like transcription activation domain in PIF3 by Arabidopsis phytochrome B.
Direct photoresponsive inhibition of a p53-like transcription activation domain in PIF3 by Arabidopsis phytochrome B.
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DOI:
10.1038/s41467-021-25909-5
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发表时间:
2021-09-23
影响因子:
16.6
通讯作者:
Chen M
中科院分区:
文献类型:
--
作者:
Yoo CY;He J;Sang Q;Qiu Y;Long L;Kim RJ;Chong EG;Hahm J;Morffy N;Zhou P;Strader LC;Nagatani A;Mo B;Chen X;Chen M
Photoactivated phytochrome B (PHYB) binds to antagonistically acting PHYTOCHROME-INTERACTING transcription FACTORs (PIFs) to regulate hundreds of light responsive genes in Arabidopsis by promoting PIF degradation. However, whether PHYB directly controls the transactivation activity of PIFs remains ambiguous. Here we show that the prototypic PIF, PIF3, possesses a p53-like transcription activation domain (AD) consisting of a hydrophobic activator motif flanked by acidic residues. A PIF3mAD mutant, in which the activator motif is replaced with alanines, fails to activate PIF3 target genes in Arabidopsis, validating the functions of the PIF3 AD in vivo. Intriguingly, the N-terminal photosensory module of PHYB binds immediately adjacent to the PIF3 AD to repress PIF3’s transactivation activity, demonstrating a novel PHYB signaling mechanism through direct interference of the transactivation activity of PIF3. Our findings indicate that PHYB, likely also PHYA, controls the stability and activity of PIFs via structurally separable dual signaling mechanisms. Photoactivated phytochrome B regulates gene expression by interacting with PIF transcription factors. Here the authors show that PIF3 contains a p53-like transcription activation domain (AD) and that PHYB can directly suppress PIF3 transactivation activity by binding adjacent to the AD.
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影响因子:
4.8
作者:
CHANG, J;KIM, DH;SUNG, YC
通讯作者:
SUNG, YC
影响因子:
4.5
作者:
Kikis, Elise A.;Oka, Yoshito;Hudson, Matthew E.;Nagatani, Akira;Quail, Peter H.
通讯作者:
Quail, Peter H.
影响因子:
5.6
作者:
Dalton JC;Bätz U;Liu J;Curie GL;Quail PH
通讯作者:
Quail PH
DOI:
10.1016/j.cub.2017.06.062
发表时间:
2017-08-21
期刊:
Current biology : CB
影响因子:
--
作者:
Dong J;Ni W;Yu R;Deng XW;Chen H;Wei N
通讯作者:
Wei N
影响因子:
9.2
作者:
Chen, M;Tao, Y;Chory, J
通讯作者:
Chory, J