8WMW
The structure of PSI-11CAC at the stationary growth phase
Summary for 8WMW
| Entry DOI | 10.2210/pdb8wmw/pdb |
| EMDB information | 37660 |
| Descriptor | Photosystem I P700 chlorophyll a apoprotein A1, Photosystem I reaction center subunit XII, PsaO, ... (36 entities in total) |
| Functional Keywords | photosynthesis, chlorophyll, alloxanthin, growth phase |
| Biological source | Rhodomonas salina More |
| Total number of polymer chains | 24 |
| Total formula weight | 809757.20 |
| Authors | Zhang, S.M.,Si, L.,Li, M. (deposition date: 2023-10-04, release date: 2024-05-29, Last modification date: 2024-11-06) |
| Primary citation | Zhang, S.,Si, L.,Su, X.,Zhao, X.,An, X.,Li, M. Growth phase-dependent reorganization of cryptophyte photosystem I antennae. Commun Biol, 7:560-560, 2024 Cited by PubMed Abstract: 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. PubMed: 38734819DOI: 10.1038/s42003-024-06268-5 PDB entries with the same primary citation |
| Experimental method | ELECTRON MICROSCOPY (3.3 Å) |
Structure validation
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