Involved in drug metabolism, as part of an interspecies gut bacterial pathway for Levodopa (L-dopa) metabolism, acting on dopamine produced by Enterecoccus L-dopa decarboxylase. Removes the para hydroxyl group of dopamine to produce m-tyramine (3-tyramine). It is possible that dopamine dehydroxylation influences the multiple side effects of L-dopa administration linked to dopamine production in the treatment of Parkinson's disease. AH2 + dopamine = 3-tyramine + A + H2O Binds 1 [4Fe-4S] cluster. Binds 1 molybdenum-bis(molybdopterin guanine dinucleotide) (Mo-bis-MGD) cofactor per subunit. Up-regulated in response to dopamine. Predicted to be exported by the Tat system. The position of the signal peptide cleavage has not been experimentally proven. Although all E.lenta strains examined are dopamine-inducible, less than 50% dehydroxylate dopamine. Intriguingly, this is due to the presence of a single-nucleotide polymorphism (SNP) that results in an Arg-506 to Ser substitution that inactivates the enzyme. Belongs to the prokaryotic molybdopterin-containing oxidoreductase family.