登録情報 データベース : EMDB / ID : EMD-23414 構造の表示 ダウンロードとリンクタイトル yeast III-IV supercomplex, III2IV1 local refinement マップデータCIII2CIV local refinement (Fig 4Ai) 詳細 試料複合体 : yeast III-IV supercomplex with cytochrome c 詳細機能・相同性 機能・相同性情報分子機能 ドメイン・相同性 構成要素
Complex III assembly / : / matrix side of mitochondrial inner membrane / protein processing involved in protein targeting to mitochondrion / mitochondrial cytochrome c oxidase assembly / Respiratory electron transport / mitochondrial respirasome assembly / Mitochondrial protein degradation / mitochondrial respiratory chain complex III assembly / respiratory chain complex IV ... Complex III assembly / : / matrix side of mitochondrial inner membrane / protein processing involved in protein targeting to mitochondrion / mitochondrial cytochrome c oxidase assembly / Respiratory electron transport / mitochondrial respirasome assembly / Mitochondrial protein degradation / mitochondrial respiratory chain complex III assembly / respiratory chain complex IV / cellular respiration / respiratory chain complex / cytochrome-c oxidase / respiratory chain complex III / quinol-cytochrome-c reductase / mitochondrial electron transport, cytochrome c to oxygen / quinol-cytochrome-c reductase activity / cytochrome-c oxidase activity / mitochondrial electron transport, ubiquinol to cytochrome c / mitochondrial crista / ubiquinone binding / ATP synthesis coupled electron transport / enzyme regulator activity / proton transmembrane transport / nuclear periphery / aerobic respiration / respiratory electron transport chain / mitochondrial membrane / metalloendopeptidase activity / mitochondrial intermembrane space / 2 iron, 2 sulfur cluster binding / mitochondrial inner membrane / oxidoreductase activity / copper ion binding / heme binding / mitochondrion / proteolysis / zinc ion binding / metal ion binding / membrane / cytosol 類似検索 - 分子機能 Cytochrome c oxidase subunit VII, budding yeast / Cytochrome c oxidase, subunit VIIa, fungal / Cytochrome b-c1 complex subunit 10, fungi / Ubiquinol-cytochrome-c reductase complex subunit (QCR10) / Cytochrome c oxidase, subunit VIa, conserved site / Cytochrome c oxidase subunit VIa signature. / Cytochrome c oxidase, subunit VIa / Cytochrome c oxidase, subunit VIa superfamily / Cytochrome c oxidase subunit VIa / Cytochrome c oxidase, subunit VIb ... Cytochrome c oxidase subunit VII, budding yeast / Cytochrome c oxidase, subunit VIIa, fungal / Cytochrome b-c1 complex subunit 10, fungi / Ubiquinol-cytochrome-c reductase complex subunit (QCR10) / Cytochrome c oxidase, subunit VIa, conserved site / Cytochrome c oxidase subunit VIa signature. / Cytochrome c oxidase, subunit VIa / Cytochrome c oxidase, subunit VIa superfamily / Cytochrome c oxidase subunit VIa / Cytochrome c oxidase, subunit VIb / : / Cytochrome c oxidase subunit Vb, zinc binding region signature. / Cytochrome c oxidase subunit VIIc / Cytochrome c oxidase subunit IV family / Cytochrome c oxidase, subunit VIb superfamily / Cytochrome c oxidase subunit VIIc superfamily / Cytochrome c oxidase subunit IV superfamily / Cytochrome c oxidase subunit VIIc / Cytochrome c oxidase subunit IV / Cytochrome c oxidase subunit 2, C-terminal / Cytochrome oxidase c subunit VIb / Cytochrome c oxidase, subunit Va/VI / Cytochrome c oxidase, subunit Va/VI superfamily / Cytochrome c oxidase subunit Va / Cytochrome c oxidase subunit VII / Cytochrome c oxidase subunit VII / Cytochrome c oxidase, subunit Vb / Cytochrome c oxidase subunit III domain / Cytochrome c oxidase subunit Vb / Cytochrome c oxidase subunit Vb, zinc binding domain profile. / Cytochrome c oxidase, subunit II / Cytochrome c oxidase, subunit Vb superfamily / Cytochrome c oxidase subunit I domain / Cytochrome C oxidase subunit II, transmembrane domain / Cytochrome b-c1 complex subunit 8 / UcrQ family / Cytochrome C oxidase subunit II, transmembrane domain / Cytochrome oxidase subunit II transmembrane region profile. / Cytochrome bc1 complex subunit Rieske, transmembrane domain superfamily / Cytochrome c oxidase subunit III / Cytochrome c oxidase subunit III-like / Cytochrome c oxidase, subunit III, 4-helical bundle / Cytochrome c oxidase subunit III / Heme-copper oxidase subunit III family profile. / Cytochrome c oxidase subunit III-like superfamily / Cytochrome b-c1 complex subunit 7 / Cytochrome b-c1 complex subunit 7 superfamily / Ubiquinol-cytochrome C reductase complex 14kD subunit / Cytochrome b-c1 complex subunit 8 superfamily / Cytochrome b-c1 complex subunit Rieske, transmembrane domain / Ubiquinol cytochrome reductase transmembrane region / Ubiquinol-cytochrome C reductase hinge domain / Ubiquinol-cytochrome C reductase hinge domain superfamily / Cytochrome c/quinol oxidase subunit II / Ubiquinol-cytochrome C reductase hinge protein / Cytochrome b-c1 complex subunit 9 / Cytochrome b-c1 complex subunit 9 superfamily / Ubiquinol-cytochrome C reductase, UQCRX/QCR9 like / Cytochrome c1, transmembrane anchor, C-terminal / : / Cytochrome b / Copper centre Cu(A) / CO II and nitrous oxide reductase dinuclear copper centers signature. / Cytochrome C oxidase subunit II, transmembrane domain superfamily / Ubiquinol-cytochrome c reductase, iron-sulphur subunit / : / Cytochrome c1 / Cytochrome C1 family / Cytochrome c oxidase, subunit I, copper-binding site / Heme-copper oxidase catalytic subunit, copper B binding region signature. / Cytochrome c oxidase-like, subunit I domain / Cytochrome oxidase subunit I profile. / : / Cytochrome b/b6, C-terminal / Cytochrome b(C-terminal)/b6/petD / Cytochrome b/b6 C-terminal region profile. / Peptidase M16, zinc-binding site / Insulinase family, zinc-binding region signature. / Cytochrome C oxidase subunit II, periplasmic domain / Cytochrome c oxidase subunit I / Cytochrome c oxidase-like, subunit I superfamily / Cytochrome C and Quinol oxidase polypeptide I / Cytochrome b/b6, C-terminal domain superfamily / Cytochrome b/b6/petB / Cytochrome c oxidase subunit II-like C-terminal / Cytochrome oxidase subunit II copper A binding domain profile. / Rieske iron-sulphur protein, C-terminal / Cytochrome b/b6, N-terminal / Cytochrome b/b6-like domain superfamily / Cytochrome b/b6 N-terminal region profile. / Di-haem cytochrome, transmembrane / Rieske iron-sulphur protein / Peptidase M16, C-terminal / Peptidase M16 inactive domain / Peptidase M16, N-terminal / Insulinase (Peptidase family M16) / Metalloenzyme, LuxS/M16 peptidase-like / Rieske [2Fe-2S] domain / Rieske [2Fe-2S] iron-sulphur domain / Rieske [2Fe-2S] iron-sulfur domain profile. 類似検索 - ドメイン・相同性 Cytochrome b-c1 complex subunit 6, mitochondrial / Cytochrome b-c1 complex subunit 7, mitochondrial / Cytochrome b / Cytochrome c oxidase subunit 1 / Cytochrome c oxidase subunit 2 / Cytochrome c oxidase subunit 3 / Cytochrome c oxidase subunit 5A, mitochondrial / Cytochrome c oxidase subunit 6, mitochondrial / Cytochrome c oxidase subunit 4, mitochondrial / Cytochrome c oxidase subunit 8, mitochondrial ... Cytochrome b-c1 complex subunit 6, mitochondrial / Cytochrome b-c1 complex subunit 7, mitochondrial / Cytochrome b / Cytochrome c oxidase subunit 1 / Cytochrome c oxidase subunit 2 / Cytochrome c oxidase subunit 3 / Cytochrome c oxidase subunit 5A, mitochondrial / Cytochrome c oxidase subunit 6, mitochondrial / Cytochrome c oxidase subunit 4, mitochondrial / Cytochrome c oxidase subunit 8, mitochondrial / Cytochrome c1, heme protein, mitochondrial / Cytochrome c oxidase subunit 9, mitochondrial / Cytochrome b-c1 complex subunit 1, mitochondrial / Cytochrome b-c1 complex subunit 2, mitochondrial / Cytochrome b-c1 complex subunit Rieske, mitochondrial / Cytochrome b-c1 complex subunit 8, mitochondrial / Cytochrome c oxidase subunit 7, mitochondrial / Cytochrome b-c1 complex subunit 9, mitochondrial / Cytochrome c oxidase subunit 13, mitochondrial / Cytochrome b-c1 complex subunit 10, mitochondrial / Cytochrome c oxidase subunit 12, mitochondrial / Cytochrome c oxidase subunit 26, mitochondrial 類似検索 - 構成要素生物種 Saccharomyces cerevisiae (パン酵母)手法 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度 : 3.7 Å 詳細 データ登録者Moe A / Di Trani J / Rubinstein J / Brzezinski P 資金援助 カナダ, スウェーデン, 2件 詳細 詳細を隠すOrganization Grant number 国 Canadian Institutes of Health Research (CIHR) PJT162186 カナダ Knut and Alice Wallenberg Foundation 2019.0043 スウェーデン
引用ジャーナル : Proc Natl Acad Sci U S A / 年 : 2021タイトル : Cryo-EM structure and kinetics reveal electron transfer by 2D diffusion of cytochrome in the yeast III-IV respiratory supercomplex.著者 : Agnes Moe / Justin Di Trani / John L Rubinstein / Peter Brzezinski / 要旨 : Energy conversion in aerobic organisms involves an electron current from low-potential donors, such as NADH and succinate, to dioxygen through the membrane-bound respiratory chain. Electron transfer ... Energy conversion in aerobic organisms involves an electron current from low-potential donors, such as NADH and succinate, to dioxygen through the membrane-bound respiratory chain. Electron transfer is coupled to transmembrane proton transport, which maintains the electrochemical proton gradient used to produce ATP and drive other cellular processes. Electrons are transferred from respiratory complexes III to IV (CIII and CIV) by water-soluble cytochrome (cyt.) In and some other organisms, these complexes assemble into larger CIIICIV supercomplexes, the functional significance of which has remained enigmatic. In this work, we measured the kinetics of the supercomplex cyt. -mediated QH:O oxidoreductase activity under various conditions. The data indicate that the electronic link between CIII and CIV is confined to the surface of the supercomplex. Single-particle electron cryomicroscopy (cryo-EM) structures of the supercomplex with cyt. show the positively charged cyt. bound to either CIII or CIV or along a continuum of intermediate positions. Collectively, the structural and kinetic data indicate that cyt. travels along a negatively charged patch on the supercomplex surface. Thus, rather than enhancing electron transfer rates by decreasing the distance that cyt. must diffuse in three dimensions, formation of the CIIICIV supercomplex facilitates electron transfer by two-dimensional (2D) diffusion of cyt. This mechanism enables the CIIICIV supercomplex to increase QH:O oxidoreductase activity and suggests a possible regulatory role for supercomplex formation in the respiratory chain. 履歴 登録 2021年2月3日 - ヘッダ(付随情報) 公開 2021年4月21日 - マップ公開 2021年4月21日 - 更新 2021年4月21日 - 現状 2021年4月21日 処理サイト : RCSB / 状態 : 公開
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