ID 1.14.14.34 DE methanesulfonate monooxygenase (FMNH2). CA FMNH2 + methanesulfonate + O2 = FMN + formaldehyde + 2 H(+) + H2O + CA sulfite. CC -!- The enzyme, characterized from Pseudomonas strains, allows the CC organisms to utilize methanesulfonate as their sulfur source. CC -!- It acts in combination with a dedicated NADH-dependent FMN reductase CC (EC 1.5.1.42), which provides it with reduced FMN. cf. CC EC 1.14.13.111. //