9KC59KC5 の概要
| エントリーDOI | 10.2210/pdb9kc5/pdb |
| EMDBエントリー | 62242 |
| 分子名称 | Photosystem I P700 chlorophyll a apoprotein A1, Photosystem I reaction center subunit XI, Photosystem I reaction center subunit XII, ... (32 entities in total) |
| 機能のキーワード | photosystem i, electron transport, photosynthesis |
| 由来する生物種 | Galdieria sulphuraria 詳細 |
| タンパク質・核酸の鎖数 | 20 |
| 化学式量合計 | 643559.03 |
| 構造登録者 | |
| 主引用文献 | Kato, K.,Kumazawa, M.,Nakajima, Y.,Suzuki, T.,Dohmae, N.,Shen, J.R.,Ifuku, K.,Nagao, R. Structure of a photosystem I supercomplex from Galdieria sulphuraria close to an ancestral red alga. Sci Adv, 11:eadv7488-eadv7488, 2025 Cited by PubMed Abstract: Red algae exhibit unique photosynthetic adaptations, characterized by photosystem I (PSI) supercomplexes containing light-harvesting complexes (LHCs), forming PSI-LHCI supercomplexes. In this study, we solved the PSI-LHCI structure of NIES-3638 at 2.19-angstrom resolution using cryo-electron microscopy, revealing a PSI monomer core associated with seven LHCI subunits. Structural analysis uncovered the absence of phylloquinones, the common secondary electron acceptor in PSI of photosynthetic organisms, suggesting adaptation to a benzoquinone-like molecule. Phylogenetic analysis suggests that retains traits characteristic of an ancestral red alga, including distinctive LHCI binding and interaction patterns. Variations in LHCI composition and interactions across red algae, particularly in red-lineage chlorophyll /-binding-like protein and red algal LHCs, highlight evolutionary divergence and specialization. These findings not only deepen our understanding of red algal PSI-LHCI diversification but also enable us to predict features of an ancestral red algal PSI-LHCI supercomplex, providing a framework to explore evolutionary adaptations from an ancestral red alga. PubMed: 40378202DOI: 10.1126/sciadv.adv7488 主引用文献が同じPDBエントリー |
| 実験手法 | ELECTRON MICROSCOPY (2.19 Å) |
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