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-Structure paper
タイトル | Structure of a diatom photosystem II supercomplex containing a member of Lhcx family and dimeric FCPII. |
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ジャーナル・号・ページ | Sci Adv, Vol. 9, Issue 43, Page eadi8446, Year 2023 |
掲載日 | 2023年10月27日 |
著者 | Yue Feng / Zhenhua Li / Xiaoyi Li / Lili Shen / Xueyang Liu / Cuicui Zhou / Jinyang Zhang / Min Sang / Guangye Han / Wenqiang Yang / Tingyun Kuang / Wenda Wang / Jian-Ren Shen / |
PubMed 要旨 | Diatoms rely on fucoxanthin chlorophyll -binding proteins (FCPs) for their great success in oceans, which have a great diversity in their pigment, protein compositions, and subunit organizations. We ...Diatoms rely on fucoxanthin chlorophyll -binding proteins (FCPs) for their great success in oceans, which have a great diversity in their pigment, protein compositions, and subunit organizations. We report a unique structure of photosystem II (PSII)-FCPII supercomplex from at 2.68-Å resolution by cryo-electron microscopy. FCPIIs within this PSII-FCPII supercomplex exist in dimers and monomers, and a homodimer and a heterodimer were found to bind to a PSII core. The FCPII homodimer is formed by Lhcf7 and associates with PSII through an Lhcx family antenna Lhcx6_1, whereas the heterodimer is formed by Lhcf6 and Lhcf11 and connects to the core together with an Lhcf5 monomer through Lhca2 monomer. An extended pigment network consisting of diatoxanthins, diadinoxanthins, fucoxanthins, and chlorophylls is revealed, which functions in efficient light harvesting, energy transfer, and dissipation. These results provide a structural basis for revealing the energy transfer and dissipation mechanisms and also for the structural diversity of FCP antennas in diatoms. |
リンク | Sci Adv / PubMed:37878698 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.68 - 3.19 Å |
構造データ | EMDB-35766, PDB-8iwh: EMDB-35899, PDB-8j0d: |
化合物 | ChemComp-BCR: ChemComp-OEX: ChemComp-CL: ChemComp-CLA: ChemComp-PHO: ChemComp-BCT: ChemComp-LHG: ChemComp-SQD: ChemComp-DGD: ChemComp-LMG: ChemComp-FE2: ChemComp-PL9: ChemComp-HEM: ChemComp-LMU: ChemComp-KC1: ChemComp-A86: ChemComp-DD6: ChemComp-KC2: ChemComp-ET4: ChemComp-LMT: |
由来 |
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キーワード | PHOTOSYNTHESIS / PSII supercomplex / LHCX / FCP / heterodimer |