タンパク質・ペプチド: Quinol:cytochrome c oxidoreductase monoheme cytochrome subunit
タンパク質・ペプチド: ActF
タンパク質・ペプチド: ActH
リガンド: HEME C
リガンド: FE3-S4 CLUSTER
リガンド: IRON/SULFUR CLUSTER
キーワード
electron transfer / quinol oxidation / respiratory chain / MEMBRANE PROTEIN
機能・相同性
機能・相同性情報
electron transfer activity / heme binding / metal ion binding / membrane / plasma membrane 類似検索 - 分子機能
NrfD family / Alternative complex III, ActD subunit / MoCo/4Fe-4S cofactor protein extended Tat translocation domain / Polysulphide reductase, NrfD / Alternative complex III, ActD subunit / Cytochrome c7-like / Cytochrome c7 and related cytochrome c / 4Fe-4S dicluster domain / Cytochrome C oxidase, cbb3-type, subunit III / Multiheme cytochrome superfamily ...NrfD family / Alternative complex III, ActD subunit / MoCo/4Fe-4S cofactor protein extended Tat translocation domain / Polysulphide reductase, NrfD / Alternative complex III, ActD subunit / Cytochrome c7-like / Cytochrome c7 and related cytochrome c / 4Fe-4S dicluster domain / Cytochrome C oxidase, cbb3-type, subunit III / Multiheme cytochrome superfamily / Cytochrome c family profile. / Cytochrome c-like domain / Cytochrome c-like domain superfamily / 4Fe-4S ferredoxin-type iron-sulfur binding domain profile. / 4Fe-4S ferredoxin-type, iron-sulphur binding domain / Prokaryotic membrane lipoprotein lipid attachment site profile. 類似検索 - ドメイン・相同性
Cytochrome c family protein / Fe-S-cluster-containing hydrogenase / Polysulphide reductase NrfD / DUF3341 domain-containing protein / Quinol:cytochrome c oxidoreductase monoheme cytochrome subunit / Quinol:cytochrome c oxidoreductase quinone-binding subunit 2 / LemA family protein 類似検索 - 構成要素
ジャーナル: Nat Commun / 年: 2018 タイトル: Structural basis for energy transduction by respiratory alternative complex III. 著者: Joana S Sousa / Filipa Calisto / Julian D Langer / Deryck J Mills / Patrícia N Refojo / Miguel Teixeira / Werner Kühlbrandt / Janet Vonck / Manuela M Pereira / 要旨: Electron transfer in respiratory chains generates the electrochemical potential that serves as energy source for the cell. Prokaryotes can use a wide range of electron donors and acceptors and may ...Electron transfer in respiratory chains generates the electrochemical potential that serves as energy source for the cell. Prokaryotes can use a wide range of electron donors and acceptors and may have alternative complexes performing the same catalytic reactions as the mitochondrial complexes. This is the case for the alternative complex III (ACIII), a quinol:cytochrome c/HiPIP oxidoreductase. In order to understand the catalytic mechanism of this respiratory enzyme, we determined the structure of ACIII from Rhodothermus marinus at 3.9 Å resolution by single-particle cryo-electron microscopy. ACIII presents a so-far unique structure, for which we establish the arrangement of the cofactors (four iron-sulfur clusters and six c-type hemes) and propose the location of the quinol-binding site and the presence of two putative proton pathways in the membrane. Altogether, this structure provides insights into a mechanism for energy transduction and introduces ACIII as a redox-driven proton pump.