This domain is located centrally in Sulfide dehydrogenase [flavocytochrome c] flavoprotein chain from the proteobacteria Allochromatium vinosum, a component of the enzyme that catalyses the reversible conversion of sulphide to elemental sulfur in vitro. This domain is C-terminal to Pfam:PF07992 and N-terminal to Pfam:PF09242. This domain shows a five-stranded parallel beta-sheet flanked on one side by three alpha-helices and on the other side by a three-stranded anti parallel beta-sheet [1].

1: The structure of flavocytochrome c sulfide dehydrogenase from a purple phototrophic bacterium. Chen ZW, Koh M, Van Driessche G, Van Beeumen JJ, Bartsch RG, Meyer TE, Cusanovich MA, Mathews FS; Science. 1994;266:430-432. PMID:7939681

2: Structure analysis and comparative characterization of the cytochrome c' and flavocytochrome c from thermophilic purple photosynthetic bacterium Thermochromatium tepidum. Hirano Y, Kimura Y, Suzuki H, Miki K, Wang ZY; Biochemistry. 2012;51:6556-6567. PMID:22827326

3: Structure of the flavocytochrome c sulfide dehydrogenase associated with the copper-binding protein CopC from the haloalkaliphilic sulfur-oxidizing bacterium Thioalkalivibrio paradoxusARh 1. Osipov EM, Lilina AV, Tsallagov SI, Safonova TN, Sorokin DY, Tikhonova TV, Popov VO; Acta Crystallogr D Struct Biol. 2018;74:632-642. PMID:29968673