EC 1.8.1.21     
Accepted name: dissimilatory dimethyldisulfide reductase
Reaction: 2 methanethiol + NAD+ = dimethyl disulfide + NADH + H+
Systematic name: methanethiol:NAD+ oxidoreductase (dimethyl disulfide-forming)
Comments: The enzyme’s activity has been demonstrated in the bacterium Thiobacillus thioparus E6. The methanethiol formed is eventually oxidized to sulfate and carbon dioxide, and the latter assimilated for autotrophic growth.
References:
1.  Smith, N. A. and Kelly, D. P. Isolation and physiological characterization of authotrophic sulphur bacteria oxidizing dimethyldisulphide as sole source of energy. J. Gen. Microbiol. 134 (1988) 1407–1417.
2.  Smith, N. A. and Kelly, D. P. Mechanism of oxidation of dimethyl disulphide by Thiobacillus thioparus E6. J. Gen. Microbiol. 134 (1988) 3031–3039.
[EC 1.8.1.21 created 2019]