The structure of Arabidopsis phytochrome A reveals topological and functional diversification among the plant photoreceptor isoforms.
The structure of Arabidopsis phytochrome A reveals topological and functional diversification among the plant photoreceptor isoforms.
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DOI:
10.1038/s41477-023-01435-8
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发表时间:
2023-07
期刊:
影响因子:
18
通讯作者:
Li, Huilin
中科院分区:
文献类型:
--
作者:
Burgie, E. Sethe;Li, Hua;Gannam, Zachary T. K.;McLoughlin, Katrice E.;Vierstra, Richard D.;Li, Huilin
Plants employ a divergent cohort of phytochrome (Phy) photoreceptors to govern many aspects of morphogenesis through reversible photointerconversion between inactive Pr and active Pfr conformers. The two most influential are PhyA whose retention of Pfr enables sensation of dim light, while the relative instability of Pfr for PhyB makes it better suited for detecting full sun and temperature. To better understand these contrasts, we solved, by cryo-electron microscopy, the three-dimensional structure of full-length PhyA as Pr. Like PhyB, PhyA dimerizes through head-to-head assembly of its C-terminal histidine kinase-related domains (HKRDs), while the remainder assembles as a head-to-tail light-responsive platform. Whereas the platform and HKRDs associate asymmetrically in PhyB dimers, these lopsided connections are absent in PhyA. Analysis of truncation and site-directed mutants revealed that this decoupling and altered platform assembly have functional consequences for Pfr stability of PhyA and highlights how plant Phy structural diversification has extended light and temperature perception.
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影响因子:
48
作者:
Gibson, Daniel G.;Young, Lei;Smith, Hamilton O.
通讯作者:
Smith, Hamilton O.
影响因子:
64.8
作者:
Bhoo, SH;Davis, SJ;Vierstra, RD
通讯作者:
Vierstra, RD
DOI:
10.1074/jbc.ra118.003069
发表时间:
2018-06-08
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Etzl S;Lindner R;Nelson MD;Winkler A
通讯作者:
Winkler A
DOI:
10.1073/pnas.1818217116
发表时间:
2019-04-23
影响因子:
11.1
作者:
Huang, He;McLoughlin, Katrice E.;Nusinow, Dmitri A.
通讯作者:
Nusinow, Dmitri A.
影响因子:
13.6
作者:
Gourinchas G;Etzl S;Göbl C;Vide U;Madl T;Winkler A
通讯作者:
Winkler A