trimethyluric acid monooxygenase activity
Catalysis of the reaction: 1,3,7-trimethyluric acid + O2 + NADH + 3 H+ = 1,3,7-trimethyl-5-hydroxyisourate + NAD + H2O.
GO:0016709
oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, NAD(P)H as one donor, and incorporation of one atom of oxygen
is_a