>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=95.57  E-value=0.0098  Score=38.65  Aligned_cols=58  Identities=14%  Similarity=0.238  Sum_probs=36.8

Q ss_pred             CCCCCCCHHHHHCCCCCCCCHHHHHH---CCCCC-CCCEEEEECCCCEEEEECCCEEECCCCE
Q ss_conf             21222100122012332210013442---02234-3101244036740211023224305742
Q gi|254780675|r  230 EISQFVQRSLQKRGIKILTESKISSV---KQKGD-MVSVQVERKDGSVSSMQAEKLLLSAGVQ  288 (481)
Q Consensus       230 ~~~~~~~~~l~~~Gv~i~~~~~v~~v---~~~~~-~~~v~~~~~dG~~~~i~~D~vl~a~Gr~  288 (481)
T Consensus       104 EvtrDL~~ARe~~G~~~v~~a~~V~~HD~~~~~P~gc~VT~~-~dG~~~~~dCDfIAGCDGFH  165 (393)
T TIGR02360       104 EVTRDLYEAREQAGLKTVYDADDVRLHDLAGDRPEGCHVTFE-RDGEEHRIDCDFIAGCDGFH  165 (393)
T ss_pred             HHHHHHHHHHHHCCCCEEEECCCCCCCCCCCCCCCCCEEEEE-ECCCEEEEEEEEEECCCCCC
T ss_conf             577889999986389556411432112656788895258777-87917776402675278886