Flavocytochrome c sulfide dehydrogenase
| Flavocytochrome c sulfide dehydrogenase, flavin-binding | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 the structure of flavocytochrome c sulfide dehydrogenase from a purple phototrophic bacterium chromatium vinosum at 2.5 angstroms resolution | |||||||||
| Identifiers | |||||||||
| Symbol | FCSD-flav_bind | ||||||||
| Pfam | PF09242 | ||||||||
| InterPro | IPR015323 | ||||||||
| SCOP2 | 1fcd / SCOPe / SUPFAM | ||||||||
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In molecular biology, flavocytochrome c sulfide dehydrogenase is an enzyme found in sulfur-oxidising bacteria such as the purple phototrophic bacteria Chromatium vinosum.[1][2] These enzymes are dimers of a flavoprotein and a dihaem cytochrome that carry out hydrogen sulfide-dependent cytochrome C reduction. The dihaem cytochrome folds into two domains, each of which resembles mitochondrial cytochrome c, with the two haem groups bound to the interior of the subunit. The flavoprotein subunit has a glutathione reductase-like fold consisting of a beta(3,4)-alpha(3) core, and an alpha+beta sandwich. The active site of the flavoprotein subunit contains a catalytically important disulfide bridge located above the pyrimidine portion of the flavin ring. The flavoprotein contains a C-terminal domain required for binding to flavin, and subsequent electron transfer.[1] Electrons are transferred from the flavin to one of the haem groups in the cytochrome.
References
- ^ a b Chen ZW, Koh M, Van Driessche G, Van Beeumen JJ, Bartsch RG, Meyer TE, Cusanovich MA, Mathews FS (October 1994). "The structure of flavocytochrome c sulfide dehydrogenase from a purple phototrophic bacterium". Science. 266 (5184): 430–2. doi:10.1126/science.7939681. PMID 7939681.
- ^ Quentmeier A, Hellwig P, Bardischewsky F, Wichmann R, Friedrich CG (November 2004). "Sulfide dehydrogenase activity of the monomeric flavoprotein SoxF of Paracoccus pantotrophus". Biochemistry. 43 (46): 14696–703. doi:10.1021/bi048568y. PMID 15544340.