Accepted name: 4-methylaminobutanoate oxidase (formaldehyde-forming)
Reaction: 4-methylaminobutanoate + O2 + H2O = 4-aminobutanoate + formaldehyde + H2O2
Other name(s): mabO (gene name)
Systematic name: 4-methylaminobutanoate:oxygen oxidoreductase (formaldehyde-forming)
Comments: A flavoprotein (FAD). In the enzyme from the soil bacterium Arthrobacter nicotinovorans the cofactor is covalently bound. Participates in the nicotine degradation pathway of this organism.
1.  Chiribau, C.B., Sandu, C., Fraaije, M., Schiltz, E. and Brandsch, R. A novel γ-N-methylaminobutyrate demethylating oxidase involved in catabolism of the tobacco alkaloid nicotine by Arthrobacter nicotinovorans pAO1. Eur. J. Biochem. 271 (2004) 4677–4684. [PMID: 15606755]
[EC created 2012]