ID   1.8.5.4
DE   bacterial sulfide:quinone reductase.
AN   sulfide:quinone reductase.
CA   n a quinone + n H(+) + n hydrogen sulfide = n a quinol + n sulfur.
CC   -!- Ubiquinone, plastoquinone or menaquinone can act as acceptor in
CC       different species.
CC   -!- This enzyme catalyzes the formation of sulfur globules.
CC   -!- It repeats the catalytic cycle without releasing the product,
CC       producing a polysulfide of up to 10 sulfur atoms.
CC   -!- The reaction stops when the maximum length of the polysulfide that
CC       can be accommodated in the sulfide oxidation pocket is achieved.
CC   -!- The enzyme also plays an important role in anoxygenic bacterial
CC       photosynthesis. cf. EC 1.8.5.8.
DR   Q7ZAG8, SQRD_ACIAM ;  B7JBP8, SQRD_ACIF2 ;  O67931, SQRD_AQUAE ;
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