>TIGR02360 pbenz_hydroxyl 4-hydroxybenzoate 3-monooxygenase; InterPro: IPR012733 4-hydroxybenzoate 3-monooxygenase is a flavoprotein that converts its substrate to 3,4-dihydroxybenzoate, which subsequently enters the beta-ketioadipate pathway of aromatic degradation, using molecular oxygen and NADPH as shown below . 4-hydroxybenzoate + NADPH + O(2) = 3,4-dihydroxybenzoate + NADP(+) + H(2)O 4-hydroxybenzoate is an intermediate in the degradation of lignin and other aromatic plant compounds, and this enzyme is found extensively in soil bacteria. This enzyme is a homodimer where each subunit is composed of three distinct domains: an N-terminal flavin-binding domain with a beta-alpha-beta fold, a small substrate-binding domain composed of a single alpha helix and beta-sheet, and a C-terminal helical domain . The active site is found at the interface of all three domains. Catalysis occurs by a two-step reaction. In the first step, flavin is reduced by NADPH. Subsequently, the reduced flavin is oxygenated to a hydroperoxide which transfers the hydroxyl group to the substrate, forming 3,4-dihydroxybenzoate.; GO: 0018659 4-hydroxybenzoate 3-monooxygenase activity, 0050660 FAD binding, 0043639 benzoate catabolic process.

Probab=98.54  E-value=1.4e-07  Score=62.77  Aligned_cols=33  Identities=27%  Similarity=0.520  Sum_probs=29.8

Q ss_pred             CEEEEECCCHHHHHHHHHHHHCCCCEEEEECCC
Q ss_conf             519999897779999999998699599996788
Q gi|254780283|r    6 SKILIIGSGPAGYTAAIYAARAMLKPVIIAGSD   38 (321)
Q Consensus         6 ~dVvIIG~GpAGl~aA~~l~r~g~~v~iie~~~   38 (321)
T Consensus         3 TqVaIiG~GPsGLLLGQLLh~~GId~viLEr~~   35 (393)
T TIGR02360         3 TQVAIIGAGPSGLLLGQLLHKAGIDTVILERKS   35 (393)
T ss_pred             EEEEEECCCHHHHHHHHHHHHCCCCEEEEECCC
T ss_conf             179997577357899999986698589972357