ubiquinol–cytochrome-c reductase

ubiquinol–cytochrome-c reductase
ubi·qui·nol–cy·to·chrome-c re·duc·tase (u″bĭ-kwĭ-nolґ siґto-krōm rĕ-dukґtās) [EC 1.10.2.2] an enzyme complex of the inner mitochondrial membrane that catalyzes the transfer of electrons from ubiquinol to cytochrome c, oxidizing the former and reducing the latter in a reaction of the electron transport chain (q.v.). The enzyme contains cytochromes b and c1> and iron-sulfur prosthetic groups and is associated with proton translocation and the resultant synthesis of ATP. Called also ubiquinol dehydrogenase.

Medical dictionary. 2011.

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  • cytochrome b — A cytochrome of the respiratory chain. A deficiency of this cytochrome leads to chronic granulomatous disease. * * * a cytochrome in the inner mitochondrial membrane that, with cytochrome c1 and an iron sulfur protein, acts as the electron… …   Medical dictionary

  • cytochrome c — The mobile cytochrome that transports electrons from Complex III to Complex IV of the respiratory chain. * * * cytochrome c n, often italicized 3d c the most abundant and stable of the cytochromes * * * a cytochrome on the inner mitochondrial… …   Medical dictionary

  • cytochrome c1 — a cytochrome in the inner mitochondrial membrane that, with cytochrome b and an iron sulfur protein, acts as the electron carrier of the enzyme ubiquinol–cytochrome c reductase …   Medical dictionary

  • ubiquinone — A 2,3 dimethoxy 5 methyl 1,4 benzoquinone with a multiprenyl side chain; a mobile component of electron transport. SEE ALSO: coenzyme Q. * * * ubi·qui·none yü bik wə .nōn, .yü bi kwi nōn n any of a group of lipid soluble quinones that contain a… …   Medical dictionary

  • ubiquinol dehydrogenase — ubi·qui·nol de·hy·dro·gen·ase (u″bĭ kwĭ nolґ de hiґdro jən ās) ubiquinol–cytochrome c reductase …   Medical dictionary

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