Part of a multicomponent enzyme which catalyzes the degradation of phenol and some of its methylated derivatives (PubMed:2254259). DmpP probably transfers electrons from NADH, via FAD and the iron-sulfur center, to the oxygenase component of the complex (PubMed:2254259). Required for growth on phenol and for in vitro phenol hydroxylase activity (PubMed:2254258, PubMed:2254259). H(+) + NADH + O2 + phenol = catechol + H2O + NAD(+) Binds 1 FAD per subunit. Binds 1 [2Fe-2S] cluster per subunit. Aromatic compound metabolism; phenol degradation. The multicomponent enzyme phenol hydroxylase is formed by DmpL (P1 component), DmpM (P2 component), DmpN (P3 component), DmpO (P4 component) and DmpP (P5 component). Cells lacking this gene cannot grow on phenol.