Reaction catalyzed by dissimilatory sulfite reductase (1.8.99.5)
a [DsrC protein]-S-sulfanyl-L-cysteine
+
2
acceptor
+
3
H2O
=
+
a [DsrC protein]-dithiol
+
2
reduced acceptor
+
2
a [DsrC protein]-S-sulfanyl-L-cysteine
+
2 acceptor
+
3 H2O
=
sulfite
+
a [DsrC protein]-dithiol
+
2 reduced acceptor
+
2 H+
