- EMDB-62242: PSI-LHCI of the red alga Galdieria sulphuraria NIES-3638 -
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基本情報
登録情報
データベース: EMDB / ID: EMD-62242
タイトル
PSI-LHCI of the red alga Galdieria sulphuraria NIES-3638
マップデータ
試料
複合体: PSI-LHCI
タンパク質・ペプチド: x 20種
リガンド: x 12種
キーワード
Photosystem I / ELECTRON TRANSPORT / PHOTOSYNTHESIS
機能・相同性
機能・相同性情報
plastid thylakoid membrane / thylakoid membrane / photosynthesis, light harvesting / photosystem I reaction center / photosystem I / photosynthetic electron transport in photosystem I / photosystem I / plastid / chlorophyll binding / chloroplast thylakoid membrane ...plastid thylakoid membrane / thylakoid membrane / photosynthesis, light harvesting / photosystem I reaction center / photosystem I / photosynthetic electron transport in photosystem I / photosystem I / plastid / chlorophyll binding / chloroplast thylakoid membrane / photosynthesis / chloroplast / 4 iron, 4 sulfur cluster binding / electron transfer activity / oxidoreductase activity / protein domain specific binding / mRNA binding / magnesium ion binding / metal ion binding / membrane 類似検索 - 分子機能
Photosystem I PsaO / PsaO transmembrane domain / Photosystem I reaction centre subunit PsaK / Photosystem I PsaM, reaction centre superfamily / Photosystem I PsaM, reaction centre / Photosystem I protein M (PsaM) / Photosystem I reaction centre subunit PsaK superfamily / Photosystem I psaG and psaK proteins signature. / Photosystem I reaction center subunit V/PsaK / Photosystem I psaG / psaK ...Photosystem I PsaO / PsaO transmembrane domain / Photosystem I reaction centre subunit PsaK / Photosystem I PsaM, reaction centre superfamily / Photosystem I PsaM, reaction centre / Photosystem I protein M (PsaM) / Photosystem I reaction centre subunit PsaK superfamily / Photosystem I psaG and psaK proteins signature. / Photosystem I reaction center subunit V/PsaK / Photosystem I psaG / psaK / Photosystem I PsaL, reaction centre subunit XI / Photosystem I, reaction centre subunit XI / Photosystem I PsaL, reaction centre subunit XI superfamily / Photosystem I reaction centre subunit XI / Photosystem I reaction centre subunit VIII / Photosystem I reaction centre subunit VIII / Photosystem I reaction centre subunit VIII superfamily / Photosystem I PsaF, reaction centre subunit III / Photosystem I PsaF, reaction centre subunit III superfamily / Photosystem I reaction centre subunit III / Photosystem I PsaD / Photosystem I, reaction centre subunit PsaD superfamily / PsaD / Photosystem I PsaE, reaction centre subunit IV / Photosystem I PsaJ, reaction centre subunit IX superfamily / Photosystem I reaction centre subunit IV / PsaE / Chlorophyll A-B binding protein, plant and chromista / Photosystem I PsaJ, reaction centre subunit IX / Photosystem I reaction centre subunit IX / PsaJ / Chlorophyll A-B binding protein / Chlorophyll A-B binding protein / Photosystem I protein PsaC / Photosystem I PsaB / Photosystem I PsaA / Photosystem I PsaA/PsaB, conserved site / Photosystem I psaA and psaB proteins signature. / : / Photosystem I PsaA/PsaB / Photosystem I PsaA/PsaB superfamily / Photosystem I psaA/psaB protein / Electron transport accessory-like domain superfamily / 4Fe-4S dicluster domain / 4Fe-4S ferredoxin, iron-sulphur binding, conserved site / 4Fe-4S ferredoxin-type iron-sulfur binding region signature. / 4Fe-4S ferredoxin-type iron-sulfur binding domain profile. / 4Fe-4S ferredoxin-type, iron-sulphur binding domain 類似検索 - ドメイン・相同性
Photosystem I subunit IV / Photosystem I P700 chlorophyll a apoprotein A1 / Photosystem I P700 chlorophyll a apoprotein A2 / Photosystem I iron-sulfur center / Photosystem I reaction center subunit II / Photosystem I reaction center subunit III / Photosystem I reaction center subunit VIII / Photosystem I reaction center subunit IX / PSI-K / Photosystem I reaction center subunit XI ...Photosystem I subunit IV / Photosystem I P700 chlorophyll a apoprotein A1 / Photosystem I P700 chlorophyll a apoprotein A2 / Photosystem I iron-sulfur center / Photosystem I reaction center subunit II / Photosystem I reaction center subunit III / Photosystem I reaction center subunit VIII / Photosystem I reaction center subunit IX / PSI-K / Photosystem I reaction center subunit XI / Photosystem I reaction center subunit XII / Light-harvesting complex protein / Light-harvesting complex protein / Light-harvesting complex protein / Light-harvesting complex protein / Light-harvesting complex protein / Uncharacterized protein / Photosystem I subunit O / Uncharacterized protein / Light-harvesting complex protein 類似検索 - 構成要素
ジャーナル: Sci Adv / 年: 2025 タイトル: Structure of a photosystem I supercomplex from close to an ancestral red alga. 著者: Koji Kato / Minoru Kumazawa / Yoshiki Nakajima / Takehiro Suzuki / Naoshi Dohmae / Jian-Ren Shen / Kentaro Ifuku / Ryo Nagao / 要旨: Red algae exhibit unique photosynthetic adaptations, characterized by photosystem I (PSI) supercomplexes containing light-harvesting complexes (LHCs), forming PSI-LHCI supercomplexes. In this study, ...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.