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ID 60850
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Xu, Caizhe Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, The Chinese Academy of Sciences
Pi, Xiong State Key Laboratory of Membrane Biology, Beijing Advanced Innovation Center for Structural Biology & Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University
Huang, Yawen State Key Laboratory of Membrane Biology, Beijing Advanced Innovation Center for Structural Biology & Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University
Han, Guangye Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, The Chinese Academy of Sciences
Chen, Xiaobo Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, The Chinese Academy of Sciences
Qin, Xiaochun School of Biological Science and Technology, University of Jinan
Huang, Guoqiang State Key Laboratory of Membrane Biology, Beijing Advanced Innovation Center for Structural Biology & Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University
Zhao, Songhao Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, The Chinese Academy of Sciences
Yang, Yanyan Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, The Chinese Academy of Sciences
Kuang, Tingyun Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, The Chinese Academy of Sciences
Wang, Wenda Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, The Chinese Academy of Sciences
Sui, Sen-Fang State Key Laboratory of Membrane Biology, Beijing Advanced Innovation Center for Structural Biology & Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University
Shen, Jian-Ren Research Institute for Interdisciplinary Science, and Graduate School of Natural Science and Technology, Okayama University ORCID Kaken ID publons researchmap
Abstract
Diatom is an important group of marine algae and contributes to around 20% of the global photosynthetic carbon fixation. Photosystem I (PSI) of diatoms is associated with a large number of fucoxanthin-chlorophyll a/c proteins (FCPIs). We report the structure of PSI-FCPI from a diatom Chaetoceros gracilis at 2.38 Å resolution by single-particle cryo-electron microscopy. PSI-FCPI is a monomeric supercomplex consisting of 12 core and 24 antenna subunits (FCPIs), and 326 chlorophylls a, 34 chlorophylls c, 102 fucoxanthins, 35 diadinoxanthins, 18 β-carotenes and some electron transfer cofactors. Two subunits designated PsaR and PsaS were found in the core, whereas several subunits were lost. The large number of pigments constitute a unique and huge network ensuring efficient energy harvesting, transfer and dissipation. These results provide a firm structural basis for unraveling the mechanisms of light-energy harvesting, transfer and quenching in the diatom PSI-FCPI, and also important clues to evolutionary changes of PSI-LHCI.
Keywords
Bioenergetics
Cryoelectron microscopy
Photosystem I
Published Date
2020-10-08
Publication Title
Nature Communications
Volume
volume11
Issue
issue1
Publisher
Nature Research
Start Page
5081
ISSN
2041-1723
NCID
AA12645905
Content Type
Journal Article
language
英語
OAI-PMH Set
岡山大学
Copyright Holders
© The Author(s) 2020
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PubMed ID
DOI
Web of Science KeyUT
Related Url
isVersionOf https://doi.org/10.1038/s41467-020-18867-x
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http://creativecommons.org/ licenses/by/4.0/