- EMDB-39671: Cryo-EM structure of a tri-heme cytochrome-associated RC-LH1 comp... -
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データベース: EMDB / ID: EMD-39671
タイトル
Cryo-EM structure of a tri-heme cytochrome-associated RC-LH1 complex from a marine photoheterotrophic bacterium, purified with magnesium-free solutions.
マップデータ
Cryo-EM structure of a tri-heme cytochrome-associated RC-LH1 complex from a marine photoheterotrophic bacterium
Photosynthesis / Reaction center / Energy transfer / Photosynthetic bacteria
機能・相同性
機能・相同性情報
organelle inner membrane / plasma membrane-derived chromatophore membrane / plasma membrane light-harvesting complex / bacteriochlorophyll binding / photosynthetic electron transport in photosystem II / photosynthesis, light reaction / : / electron transfer activity / iron ion binding / heme binding ...organelle inner membrane / plasma membrane-derived chromatophore membrane / plasma membrane light-harvesting complex / bacteriochlorophyll binding / photosynthetic electron transport in photosystem II / photosynthesis, light reaction / : / electron transfer activity / iron ion binding / heme binding / metal ion binding / membrane / plasma membrane 類似検索 - 分子機能
Photosynthetic reaction centre, cytochrome c subunit / Multihaem cytochrome, PRC subunit superfamily / Photosynthetic reaction centre cytochrome C subunit / Antenna complex, beta subunit, conserved site / Antenna complexes beta subunits signature. / Antenna complex, alpha subunit / Antenna complex, alpha subunit conserved site / Antenna complexes alpha subunits signature. / Antenna complex, alpha/beta subunit / Light-harvesting protein B beta chain ...Photosynthetic reaction centre, cytochrome c subunit / Multihaem cytochrome, PRC subunit superfamily / Photosynthetic reaction centre cytochrome C subunit / Antenna complex, beta subunit, conserved site / Antenna complexes beta subunits signature. / Antenna complex, alpha subunit / Antenna complex, alpha subunit conserved site / Antenna complexes alpha subunits signature. / Antenna complex, alpha/beta subunit / Light-harvesting protein B beta chain / Antenna complex, beta domain superfamily / Antenna complex alpha/beta subunit / Light-harvesting complex / Photosynthetic reaction centre, H subunit / Bacterial photosynthetic reaction centre, H-chain, C-terminal / Photosynthetic reaction centre, M subunit / Photosynthetic reaction centre, H subunit, N-terminal / Photosynthetic reaction centre, H subunit, N-terminal domain superfamily / Photosynthetic reaction centre, H-chain N-terminal region / PRC-barrel domain / PRC-barrel domain / Photosynthetic reaction centre, L subunit / PRC-barrel-like superfamily / Multiheme cytochrome superfamily / : / Photosynthetic reaction centre, L/M / Photosystem II protein D1/D2 superfamily / Photosynthetic reaction centre protein / Photosynthetic reaction center proteins signature. 類似検索 - ドメイン・相同性
Uncharacterized protein / Antenna pigment protein beta chain / Antenna pigment protein alpha chain / Reaction center protein L chain / Reaction center protein M chain / Photosynthetic reaction center cytochrome c subunit / Reaction center protein H chain 類似検索 - 構成要素
National Natural Science Foundation of China (NSFC)
32100202
中国
引用
ジャーナル: Adv Sci (Weinh) / 年: 2025 タイトル: Cryo-EM Analysis of a Tri-Heme Cytochrome-Associated RC-LH1 Complex from the Marine Photoheterotrophic Bacterium Dinoroseobacter Shibae. 著者: Weiwei Wang / Yanting Liu / Jiayi Gu / Shaoya An / Cheng Ma / Haichun Gao / Nianzhi Jiao / Jian-Ren Shen / John Thomas Beatty / Michal Koblížek / Xing Zhang / Qiang Zheng / Jing-Hua Chen / 要旨: The reaction center-light harvesting 1 (RC-LH1) complex converts solar energy into electrical energy, driving the initiation of photosynthesis. The authors present a cryo-electron microscopy ...The reaction center-light harvesting 1 (RC-LH1) complex converts solar energy into electrical energy, driving the initiation of photosynthesis. The authors present a cryo-electron microscopy structure of the RC-LH1 isolated from a marine photoheterotrophic bacterium Dinoroseobacter shibae. The RC comprises four subunits, including a three-heme cytochrome (Cyt) c protein, and is surrounded by a closed LH ring composed of 17 pairs of antenna subunits. Notably, a novel subunit with an N-terminal "helix-turn-helix" motif embedded in the gap between the RC and the LH ring is identified. The purified RC-LH1 complex exhibits high stability in solutions containing Mg or Ca. The periplasmic Cyt c is predicted to bind at the junction between the Cyt subunit and the membrane plane, enabling electron transfer from Cyt c to the proximal heme of the tri-heme Cyt, and subsequently to the special pair of bacteriochlorophylls. These findings provide structural insights into the efficient energy and electron transfer processes within a distinct type of RC-LH1, and shed light on evolutionary adaptations of photosynthesis.