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-Structure paper
タイトル | Growth phase-dependent reorganization of cryptophyte photosystem I antennae. |
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ジャーナル・号・ページ | Commun Biol, Vol. 7, Issue 1, Page 560, Year 2024 |
掲載日 | 2024年5月11日 |
著者 | Shumeng Zhang / Long Si / Xiaodong Su / Xuelin Zhao / Xiaomin An / Mei Li / |
PubMed 要旨 | Photosynthetic cryptophytes are eukaryotic algae that utilize membrane-embedded chlorophyll a/c binding proteins (CACs) and lumen-localized phycobiliproteins (PBPs) as their light-harvesting antennae. ...Photosynthetic cryptophytes are eukaryotic algae that utilize membrane-embedded chlorophyll a/c binding proteins (CACs) and lumen-localized phycobiliproteins (PBPs) as their light-harvesting antennae. Cryptophytes go through logarithmic and stationary growth phases, and may adjust their light-harvesting capability according to their particular growth state. How cryptophytes change the type/arrangement of the photosynthetic antenna proteins to regulate their light-harvesting remains unknown. Here we solve four structures of cryptophyte photosystem I (PSI) bound with CACs that show the rearrangement of CACs at different growth phases. We identify a cryptophyte-unique protein, PsaQ, which harbors two chlorophyll molecules. PsaQ specifically binds to the lumenal region of PSI during logarithmic growth phase and may assist the association of PBPs with photosystems and energy transfer from PBPs to photosystems. |
リンク | Commun Biol / PubMed:38734819 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.7 - 3.5 Å |
構造データ | EMDB-37642, PDB-8wm6: EMDB-37654, PDB-8wmj: EMDB-37659, PDB-8wmv: EMDB-37660, PDB-8wmw: EMDB-37674, PDB-8wnw: |
化合物 | ChemComp-CLA: ChemComp-PQN: ChemComp-LHG:
ChemComp-WVN: ChemComp-LMT: ChemComp-SF4: ChemComp-DGD: ChemComp-LMG: ChemComp-II0: ChemComp-IHT: ChemComp-KC2: ChemComp-LMU: ChemComp-HOH: |
由来 |
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キーワード | PHOTOSYNTHESIS / thylakoid membrane / chlorophyll plastid / oxyphototroph / alloxanthin / chlorophyll c / PsaQ / growth phase / chlorophyll |