- EMDB-6828: Cryo-EM structure of the RC-LH core complex from Roseiflexus cast... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-6828
タイトル
Cryo-EM structure of the RC-LH core complex from Roseiflexus castenholzii
マップデータ
試料
複合体: photosynthetic core complex
タンパク質・ペプチド: alpha
タンパク質・ペプチド: beta
タンパク質・ペプチド: LM
タンパク質・ペプチド: cytochrome c
機能・相同性
機能・相同性情報
organelle inner membrane / plasma membrane light-harvesting complex / bacteriochlorophyll binding / chlorophyll binding / photosynthesis, light reaction / electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activity / photosynthetic electron transport in photosystem II / electron transfer activity / iron ion binding / heme binding ...organelle inner membrane / plasma membrane light-harvesting complex / bacteriochlorophyll binding / chlorophyll binding / photosynthesis, light reaction / electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activity / photosynthetic electron transport in photosystem II / electron transfer activity / iron ion binding / heme binding / membrane / metal ion binding / 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 domain superfamily / Antenna complex, alpha subunit conserved site / Antenna complexes alpha subunits signature. / Light-harvesting protein B beta chain / Antenna complex, alpha/beta subunit / Light-harvesting complex / Antenna complex alpha/beta subunit ...Photosynthetic reaction centre, cytochrome c subunit / Multihaem cytochrome, PRC subunit superfamily / Photosynthetic reaction centre cytochrome C subunit / Antenna complex, beta domain superfamily / Antenna complex, alpha subunit conserved site / Antenna complexes alpha subunits signature. / Light-harvesting protein B beta chain / Antenna complex, alpha/beta subunit / Light-harvesting complex / Antenna complex alpha/beta subunit / Photosynthetic reaction centre, L subunit / 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
Cytochrome subunit of photosynthetic reaction center / Reaction center protein L chain / Alpha subunit of light-harvesting 1 / Beta subunit of light-harvesting 1 類似検索 - 構成要素
ジャーナル: Nat Commun / 年: 2018 タイトル: Cryo-EM structure of the RC-LH core complex from an early branching photosynthetic prokaryote. 著者: Yueyong Xin / Yang Shi / Tongxin Niu / Qingqiang Wang / Wanqiang Niu / Xiaojun Huang / Wei Ding / Lei Yang / Robert E Blankenship / Xiaoling Xu / Fei Sun / 要旨: Photosynthetic prokaryotes evolved diverse light-harvesting (LH) antennas to absorb sunlight and transfer energy to reaction centers (RC). The filamentous anoxygenic phototrophs (FAPs) are important ...Photosynthetic prokaryotes evolved diverse light-harvesting (LH) antennas to absorb sunlight and transfer energy to reaction centers (RC). The filamentous anoxygenic phototrophs (FAPs) are important early branching photosynthetic bacteria in understanding the origin and evolution of photosynthesis. How their photosynthetic machinery assembles for efficient energy transfer is yet to be elucidated. Here, we report the 4.1 Å structure of photosynthetic core complex from Roseiflexus castenholzii by cryo-electron microscopy. The RC-LH complex has a tetra-heme cytochrome c bound RC encompassed by an elliptical LH ring that is assembled from 15 LHαβ subunits. An N-terminal transmembrane helix of cytochrome c inserts into the LH ring, not only yielding a tightly bound cytochrome c for rapid electron transfer, but also opening a slit in the LH ring, which is further flanked by a transmembrane helix from a newly discovered subunit X. These structural features suggest an unusual quinone exchange model of prokaryotic photosynthetic machinery.