ENTRY       EC 1.8.99.3
NAME        Hydrogensulfite reductase
            Bisulfite reductase
            Dissimilatory sulfite reductase
            Desulfoviridin
            Desulforubidin
            Desulfofuscidin
CLASS       Oxidoreductases
            Acting on a sulfur group of donors
            With other acceptors
SYSNAME     Trithionate: (acceptor) oxidoreductase
REACTION    (O3S.S.SO3)2- + Acceptor + 2 H2O + HO- =
            3 (HSO3)- + Reduced acceptor
SUBSTRATE   (O3S.S.SO3)2-
            Acceptor
            H2O
            HO-
            Methyl viologen
PRODUCT     (HSO3)-
            Reduced acceptor
COFACTOR    Iron
            Sulfur
            Siroheme
COMMENT     Methyl viologen can act as acceptor. A group of sirohemoproteins
            containing iron-sulfur centres (P-582).
DBLINKS     University of Geneva ENZYME DATA BANK: 1.8.99.3
            WIT (What Is There) Metabolic Reconstruction: 1.8.99.3
///