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ENZYME entry: EC 1.8.5.4

Accepted Name
Bacterial sulfide:quinone reductase.
Alternative Name(s)
Sulfide:quinone reductase.
Reaction catalysed
n sulfide + n quinone <=> polysulfide + n quinol
Cofactor(s)
FAD.
Comment(s)
  • Ubiquinone, plastoquinone or menaquinone can act as acceptor in different species.
  • This enzyme catalyzes the formation of sulfur globules.
  • It repeats the catalytic cycle without releasing the product, producing a polysulfide of up to 10 sulfur atoms.
  • The reaction stops when the maximum length of the polysulfide that can be accommodated in the sulfide oxidation pocket is achieved.
  • The enzyme also plays an important role in anoxygenic bacterial photosynthesis.
  • Cf. EC 1.8.5.8.
Cross-references
BRENDA1.8.5.4
EC2PDB1.8.5.4
ExplorEnz1.8.5.4
PRIAM enzyme-specific profiles1.8.5.4
KEGG Ligand Database for Enzyme Nomenclature1.8.5.4
IUBMB Enzyme Nomenclature1.8.5.4
IntEnz1.8.5.4
MEDLINEFind literature relating to 1.8.5.4
MetaCyc1.8.5.4
Rhea expert-curated reactions1.8.5.4
UniProtKB/Swiss-Prot
Q7ZAG8, SQRD_ACIAM;  B7JBP8, SQRD_ACIF2;  O67931, SQRD_AQUAE;  

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