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-Structure paper
タイトル | Arrangement of electron transport chain components in bovine mitochondrial supercomplex I1III2IV1. |
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ジャーナル・号・ページ | EMBO J, Vol. 30, Issue 22, Page 4652-4664, Year 2011 |
掲載日 | 2011年9月9日 |
著者 | Thorsten Althoff / Deryck J Mills / Jean-Luc Popot / Werner Kühlbrandt / |
PubMed 要旨 | The respiratory chain in the inner mitochondrial membrane contains three large multi-enzyme complexes that together establish the proton gradient for ATP synthesis, and assemble into a supercomplex. ...The respiratory chain in the inner mitochondrial membrane contains three large multi-enzyme complexes that together establish the proton gradient for ATP synthesis, and assemble into a supercomplex. A 19-Å 3D map of the 1.7-MDa amphipol-solubilized supercomplex I(1)III(2)IV(1) from bovine heart obtained by single-particle electron cryo-microscopy reveals an amphipol belt replacing the membrane lipid bilayer. A precise fit of the X-ray structures of complex I, the complex III dimer, and monomeric complex IV indicates distances of 13 nm between the ubiquinol-binding sites of complexes I and III, and of 10-11 nm between the cytochrome c binding sites of complexes III and IV. The arrangement of respiratory chain complexes suggests two possible pathways for efficient electron transfer through the supercomplex, of which the shorter branch through the complex III monomer proximal to complex I may be preferred. |
リンク | EMBO J / PubMed:21909073 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 19.0 Å |
構造データ | |
化合物 | ChemComp-SF4: ChemComp-FMN: ChemComp-NAI: ChemComp-MG: ChemComp-FES: ChemComp-CA: ChemComp-HEM: ChemComp-SMA: ChemComp-UQ1: ChemComp-HEC: ChemComp-CDL: ChemComp-HEA: ChemComp-CU: ChemComp-ZN: ChemComp-HOH: |
由来 |
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キーワード | OXIDOREDUCTASE / SUPERCOMPLEX B / MITOCHONDRIA / RESPIRATORY CHAIN / AMPHIPOL A8-35 / RANDOM CONICAL TILT |