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https://hdl.handle.net/20.500.14094/90006508
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2024-04-20
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90006508 (fulltext)
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メタデータID
90006508
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open access
出版タイプ
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タイトル
Structure of a cyanobacterial photosystem I tetramer revealed by cryo-electron microscopy
著者
Kato, Koji ; Nagao, Ryo ; Jiang, Tian-Yi ; Ueno, Yoshifumi ; Yokono, Makio ; Chan, Siu Kit ; Watanabe, Mai ; Ikeuchi, Masahiko ; Shen, Jian-Ren ; Akimoto, Seiji ; Miyazaki, Naoyuki ; Akita, Fusamichi
著者名
Kato, Koji
著者名
Nagao, Ryo
著者名
Jiang, Tian-Yi
著者名
Ueno, Yoshifumi
著者名
Yokono, Makio
著者名
Chan, Siu Kit
著者名
Watanabe, Mai
著者名
Ikeuchi, Masahiko
著者名
Shen, Jian-Ren
著者ID
A0043
研究者ID
1000040250477
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=4124d50f6c43d4e5520e17560c007669
著者名
Akimoto, Seiji
秋本, 誠志
アキモト, セイジ
所属機関名
理学研究科
著者名
Miyazaki, Naoyuki
著者名
Akita, Fusamichi
収録物名
Nature Communications
巻(号)
10
ページ
4929-4929
出版者
Nature Research
刊行日
2019-10-30
公開日
2019-11-18
抄録
Photosystem I (PSI) functions to harvest light energy for conversion into chemical energy. The organisation of PSI is variable depending on the species of organism. Here we report the structure of a tetrameric PSI core isolated from a cyanobacterium, Anabaena sp. PCC 7120, analysed by single-particle cryo-electron microscopy (cryo-EM) at 3.3 A resolution. The PSI tetramer has a C2 symmetry and is organised in a dimer of dimers form. The structure reveals interactions at the dimer-dimer interface and the existence of characteristic pigment orientations and inter-pigment distances within the dimer units that are important for unique excitation energy transfer. In particular, characteristic residues of PsaL are identified to be responsible for the formation of the tetramer. Time-resolved fluorescence analyses showed that the PSI tetramer has an enhanced excitation-energy quenching. These structural and spectroscopic findings provide insights into the physiological significance of the PSI tetramer and evolutionary changes of the PSI organisations.
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理学研究科
学術雑誌論文
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© The Author(s) 2019.
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
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資源タイプ
journal article
言語
English (英語)
eISSN
2041-1723
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NCID
AA12645905
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関連情報
DOI
https://doi.org/10.1038/s41467-019-12942-8
URI
https://www.kobe-u.ac.jp/research_at_kobe/NEWS/news/2019_10_30_01.html
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