Structure of the maize photosystem I supercomplex with light-harvesting complexes I and II

被引：174

作者：

Pan, Xiaowei ^{[1
]}

Ma, Jun ^{[1
]}

Su, Xiaodong ^{[1
]}

Cao, Peng ^{[1
]}

Chang, Wenrui ^{[1
,2
]}

Liu, Zhenfeng ^{[1
,2
]}

Zhang, Xinzheng ^{[1
,2
,3
]}

Li, Mei ^{[1
]}

机构：

[1] Chinese Acad Sci, CAS Ctr Excellence Biomacromol, Natl Lab Biomacromol, Inst Biophys, Beijing 100101, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Inst Biophys, Ctr Biol Imaging, CAS Ctr Excellence Biomacromol, Beijing 100101, Peoples R China

来源：

SCIENCE | 2018年 / 360卷 / 6393期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

A/B BINDING-PROTEINS; STATE TRANSITIONS; ELECTRON-TRANSFER; PHOTOSYNTHETIC ACCLIMATION; ARABIDOPSIS-THALIANA; THYLAKOID MEMBRANE; PSI; SUBUNIT; ANTENNA; LHCII;

D O I：

10.1126/science.aat1156

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：

Plants regulate photosynthetic light harvesting to maintain balanced energy flux into photosystems I and II (PSI and PSII). Under light conditions favoring PSII excitation, the PSII antenna, light-harvesting complex II (LHCII), is phosphorylated and forms a supercomplex with PSI core and the PSI antenna, light-harvesting complex I (LHCI). Both LHCI and LHCII then transfer excitation energy to the PSI core. We report the structure of maize PSI-LHCI-LHCII solved by cryo electron microscopy, revealing the recognition site between LHCII and PSI. The PSI subunits PsaN and PsaO are observed at the PSI-LHCI interface and the PSI-LHCII interface, respectively. Each subunit relays excitation to PSI core through a pair of chlorophyll molecules, thus revealing previously unseen paths for energy transfer between the antennas and the PSI core.

引用

页码：1109 / 1112

页数：4

共 35 条

[1] State transitions and light adaptation require chloroplast thylakoid protein kinase STN7 [J].