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-Structure paper
| タイトル | Structure of a photosystem II-FCPII supercomplex from a haptophyte reveals a distinct antenna organization. |
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| ジャーナル・号・ページ | Nat Commun, Vol. 16, Issue 1, Page 4175, Year 2025 |
| 掲載日 | 2025年5月5日 |
著者 | Romain La Rocca / Koji Kato / Pi-Cheng Tsai / Yoshiki Nakajima / Fusamichi Akita / Jian-Ren Shen / ![]() |
| PubMed 要旨 | Haptophytes are unicellular algae that produce 30 to 50% of biomass in oceans. Among haptophytes, a subset named coccolithophores is characterized by calcified scales. Despite the importance of ...Haptophytes are unicellular algae that produce 30 to 50% of biomass in oceans. Among haptophytes, a subset named coccolithophores is characterized by calcified scales. Despite the importance of coccolithophores in global carbon fixation and CaCO production, their energy conversion system is still poorly known. Here we report a cryo-electron microscopic structure of photosystem II (PSII)-fucoxanthin chlorophyll c-binding protein (FCPII) supercomplex from Chyrostila roscoffensis, a representative of coccolithophores. This complex has two sets of six dimeric and monomeric FCPIIs, with distinct orientations. Interfaces of both FCPII/FCPII and FCPII/core differ from previously reported. We also determine the sequence of Psb36, a subunit previously found in diatoms and red algae. The principal excitation energy transfer (EET) pathways involve mainly 5 FCPIIs, where one FCPII monomer mediates EET to CP47. Our findings provide a solid structural basis for EET and energy dissipation pathways occurring in coccolithophores. |
リンク | Nat Commun / PubMed:40325014 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.22 - 2.88 Å |
| 構造データ | EMDB-62499, PDB-9kqb: ![]() EMDB-62790: PSII-6 FCPII supercomplex from haptophyte Chrysotila roscoffensis |
| 化合物 | ![]() ChemComp-CLA: ![]() ChemComp-DD6: ![]() ChemComp-A86: ![]() ChemComp-KC1: ![]() ChemComp-BCR: ![]() ChemComp-LHG: ![]() ChemComp-LMG: ![]() ChemComp-LMU: ![]() ChemComp-DGD: ![]() ChemComp-SQD: ![]() ChemComp-HEM: ![]() ChemComp-BCT: ![]() ChemComp-FE2: ![]() ChemComp-PL9: ![]() ChemComp-HOH: |
| 由来 |
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キーワード | PHOTOSYNTHESIS / photosystem II / chlorophyll / light-harvesting complex / energy transfer / LHCII / FCPII / coccolithophore / haptophyte |
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chrysotila roscoffensis (真核生物)
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