8WEY
PSI-LHCI of the red alga Cyanidium caldarium RK-1 (NIES-2137)
Summary for 8WEY
| Entry DOI | 10.2210/pdb8wey/pdb |
| EMDB information | 37480 |
| Descriptor | Photosystem I P700 chlorophyll a apoprotein A1, Photosystem I reaction center subunit XI, Photosystem I reaction center subunit XII, ... (26 entities in total) |
| Functional Keywords | photosystem i, electron transport, photosynthesis |
| Biological source | Cyanidium caldarium More |
| Total number of polymer chains | 17 |
| Total formula weight | 557226.02 |
| Authors | Kato, K.,Hamaguchi, T.,Nakajima, Y.,Kawakami, K.,Yonekura, K.,Shen, J.R.,Nagao, R. (deposition date: 2023-09-19, release date: 2024-02-14, Last modification date: 2024-11-27) |
| Primary citation | Kato, K.,Hamaguchi, T.,Kumazawa, M.,Nakajima, Y.,Ifuku, K.,Hirooka, S.,Hirose, Y.,Miyagishima, S.Y.,Suzuki, T.,Kawakami, K.,Dohmae, N.,Yonekura, K.,Shen, J.R.,Nagao, R. The structure of PSI-LHCI from Cyanidium caldarium provides evolutionary insights into conservation and diversity of red-lineage LHCs. Proc.Natl.Acad.Sci.USA, 121:e2319658121-e2319658121, 2024 Cited by PubMed Abstract: Light-harvesting complexes (LHCs) are diversified among photosynthetic organisms, and the structure of the photosystem I-LHC (PSI-LHCI) supercomplex has been shown to be variable depending on the species of organisms. However, the structural and evolutionary correlations of red-lineage LHCs are unknown. Here, we determined a 1.92-Å resolution cryoelectron microscopic structure of a PSI-LHCI supercomplex isolated from the red alga RK-1 (NIES-2137), which is an important taxon in the Cyanidiophyceae. We subsequently investigated the correlations of PSI-LHCIs from different organisms through structural comparisons and phylogenetic analysis. The PSI-LHCI structure obtained shows five LHCI subunits surrounding a PSI-monomer core. The five LHCIs are composed of two Lhcr1s, two Lhcr2s, and one Lhcr3. Phylogenetic analysis of LHCs bound to PSI in the red-lineage algae showed clear orthology of LHCs between and , whereas no orthologous relationships were found between Lhcr1-3 and LHCs in other red-lineage PSI-LHCI structures. These findings provide evolutionary insights into conservation and diversity of red-lineage LHCs associated with PSI. PubMed: 38442179DOI: 10.1073/pnas.2319658121 PDB entries with the same primary citation |
| Experimental method | ELECTRON MICROSCOPY (1.92 Å) |
Structure validation
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