Enzymatic reactions [BR:br08201]
1. Oxidoreductase reactions
1.8 Acting on a sulfur group of donors
1.8.1 With NAD+ or NADP+ as acceptor
1.8.1.22
R00861 Protein-trisulfide + NAD+ + 3 H2O <=> Protein dithiol + Sulfite + NADH + H+
Sirohaem sulfite reductase and other proteins encoded by genes at the dsr locus of Chromatium vinosum are involved in the oxidation of intracellular sulfur.