1.14.13.166 evolution PNP monooxygenase belongs to a two-component flavin-diffusible monooxygenase family 1.14.13.166 metabolism the enzyme PNP monoxygenase is involved in the degradation of 4-nitrophenol, proposed pathway, overview. 4-Nitrophenol is converted to 4-nitrocatechol by a 4-nitrophenol 2-monooxygenase, EC 1.14.13.29, of the enzyme, which is subsequently converted to 2-hydroxy-1,4-benzoquinone, EC 1.14.13.166 1.14.13.166 additional information enzyme structure homology model for PNP monooxygenase using crystal structure of chlorophenol 4-monooxygenase from Burkholderia cepacia AC1100, PDB IS 3HWC, as template. Molecular dynamics simulations performed for docking complexes show the stable interaction between enzyme and substrate 4-nitrocatechol. Docking of substrates into the active site of PNP monooxygenase, Arg100, Gln158 and Thr193 are the key catalytic residues, overview 1.14.13.166 additional information enzyme structure homology model for PNP monooxygenase using crystal structure of chlorophenol 4-monooxygenase from Burkholderia cepacia AC1100, PDB IS 3HWC, as template. Molecular dynamics simulations performed for docking complexes show the stable interaction between enzyme and substrate 4-nitrocatechol. of substrates into the active site of PNP monooxygenase, overview 1.14.13.166 physiological function the enzyme comprises two components, a flavoprotein reductase and an oxygenase, catalyzes the initial two sequential monooxygenations to convert 4-nitrophenol to trihydroxybenzene, EC 1.14.13.29 and EC 1.14.13.166