ID | 59912 |
フルテキストURL | |
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Nagao, Ryo
Research Institute for Interdisciplinary Science and Graduate School of Natural Science and Technology, Okayama University
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Kato, Koji
Research Institute for Interdisciplinary Science and Graduate School of Natural Science and Technology, Okayama University
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Ifuku, Kentaro
Graduate School of Biostudies, Kyoto University
Suzuki, Takehiro
Biomolecular Characterization Unit, RIKEN Center for Sustainable Resource Science
Kumazawa, Minoru
Faculty of Agriculture, Kyoto University
Uchiyama, Ikuo
National Institute for Basic Biology, National Institutes of Natural Sciences
Kashino, Yasuhiro
Graduate School of Life Science, University of Hyogo
Dohmae, Naoshi
Biomolecular Characterization Unit, RIKEN Center for Sustainable Resource Science
Akimoto, Seiji
Graduate School of Science,Kobe University
Shen, Jian-Ren
Research Institute for Interdisciplinary Science and Graduate School of Natural Science and Technology, Okayama University
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Miyazaki, Naoyuki
Institute for Protein Research, Osaka University
Akita, Fusamichi
Research Institute for Interdisciplinary Science and Graduate School of Natural Science and Technology, Okayama University
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抄録 | Photosynthetic light-harvesting complexes (LHCs) play a pivotal role in collecting solar energy for photochemical reactions in photosynthesis. One of the major LHCs are fucoxanthin chlorophyll a/c-binding proteins (FCPs) present in diatoms, a group of organisms having important contribution to the global carbon cycle. Here, we report a 2.40-angstrom resolution structure of the diatom photosystem I (PSI)-FCPI supercomplex by cryo-electron microscopy. The supercomplex is composed of 16 different FCPI subunits surrounding a monomeric PSI core. Each FCPI subunit showed different protein structures with different pigment contents and binding sites, and they form a complicated pigment-protein network together with the PSI core to harvest and transfer the light energy efficiently. In addition, two unique, previously unidentified subunits were found in the PSI core. The structure provides numerous insights into not only the light-harvesting strategy in diatom PSI-FCPI but also evolutionary dynamics of light harvesters among oxyphototrophs. One of the major photosynthetic light-harvesting complexes (LHCs) are fucoxanthin chlorophyll a/c-binding proteins (FCPs), which are present in diatoms, a major group of algae. Here, the authors present the cryo-EM structure of the photosystem I-FCP (PSI-FCPI) supercomplex isolated from the marine centric diatom Chaetoceros gracilis that contains 16 FCPI subunits surrounding the PSI core and discuss possible excitation energy transfer pathways.
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発行日 | 2020-05-18
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出版物タイトル |
Nature Communications
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巻 | 11巻
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号 | 1号
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出版者 | Nature Research
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ISSN | 2041-1723
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資料タイプ |
学術雑誌論文
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言語 |
英語
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OAI-PMH Set |
岡山大学
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著作権者 | © The Author(s) 2020
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論文のバージョン | publisher
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PubMed ID | |
DOI | |
Web of Science KeyUT | |
関連URL | isVersionOf https://doi.org/10.1038/s41467-020-16324-3
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ライセンス | http://creativecommons.org/licenses/by/4.0/
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助成機関名 |
日本学術振興会
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助成番号 | 17K07442
19H04726
16H06553
17H06433
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