plasma membrane-derived chromatophore membrane / plasma membrane light-harvesting complex / bacteriochlorophyll binding / photosynthetic electron transport in photosystem II / photosynthesis, light reaction / : / metal ion binding / membrane / plasma membrane 類似検索 - 分子機能
Intrinsic membrane protein family, PufX / Intrinsic membrane protein PufX / Antenna complex, beta subunit, conserved site / Antenna complexes beta subunits signature. / Antenna complex, alpha subunit / Antenna complex, alpha/beta subunit / Light-harvesting protein B beta chain / Antenna complex, beta domain superfamily / Antenna complex alpha/beta subunit / Light-harvesting complex ...Intrinsic membrane protein family, PufX / Intrinsic membrane protein PufX / Antenna complex, beta subunit, conserved site / Antenna complexes beta subunits signature. / Antenna complex, alpha subunit / 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 / PRC-barrel domain / Photosynthetic reaction centre, H subunit, N-terminal domain superfamily / Photosynthetic reaction centre, H-chain N-terminal region / PRC-barrel domain / Photosynthetic reaction centre, L subunit / PRC-barrel-like 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
Reaction center protein L chain / Photosynthetic reaction center subunit H / Reaction center protein M chain / 1-deoxy-D-xylulose-5-phosphate synthase / Antenna pigment protein alpha chain / Antenna pigment protein beta chain 類似検索 - 構成要素
ジャーナル: Sci Adv / 年: 2024 タイトル: Architectures of photosynthetic RC-LH1 supercomplexes from . 著者: Peng Wang / Bern M Christianson / Deniz Ugurlar / Ruichao Mao / Yi Zhang / Ze-Kun Liu / Ying-Yue Zhang / Adrian M Gardner / Jun Gao / Yu-Zhong Zhang / Lu-Ning Liu / 要旨: The reaction center-light-harvesting complex 1 (RC-LH1) plays an essential role in the primary reactions of bacterial photosynthesis. Here, we present high-resolution structures of native monomeric ...The reaction center-light-harvesting complex 1 (RC-LH1) plays an essential role in the primary reactions of bacterial photosynthesis. Here, we present high-resolution structures of native monomeric and dimeric RC-LH1 supercomplexes from () using cryo-electron microscopy. The RC-LH1 monomer is composed of an RC encircled by an open LH1 ring comprising 15 αβ heterodimers and a PufX transmembrane polypeptide. In the RC-LH1 dimer, two crossing PufX polypeptides mediate dimerization. Unlike counterpart, RC-LH1 dimer has a less bent conformation, lacks the PufY subunit near the LH1 opening, and includes two extra LH1 αβ subunits, forming a more enclosed S-shaped LH1 ring. Spectroscopic assays reveal that these unique structural features are accompanied by changes in the kinetics of quinone/quinol trafficking between RC-LH1 and cytochrome . Our findings reveal the assembly principles and structural variability of photosynthetic RC-LH1 supercomplexes, highlighting diverse strategies used by phototrophic bacteria to optimize light-harvesting and electron transfer in competitive environments.