>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=94.05  E-value=0.02  Score=36.14  Aligned_cols=52  Identities=13%  Similarity=0.185  Sum_probs=29.2

Q ss_pred             CCCCCCCCCCCCCHHHHHH---HCC-CCCCEEEEEEECCCCCCCEEEEEEECCCCEE
Q ss_conf             2222222223220023442---014-6872169997213321100000232045312
Q gi|254781053|r  223 KIMSKQGMNFQLNSKVSSV---KKV-KGKAQVVYRSTDDEPINIEADAVLVAAGRRP  275 (466)
Q Consensus       223 ~~l~~~gV~i~~~~~v~~i---~~~-~~~~~v~~~~~~g~~~~i~~D~vl~a~G~~P  275 (466)
T Consensus       111 ~ARe~~G~~~v~~a~~V~~HD~~~~~P~gc~VT~~~-dG~~~~~dCDfIAGCDGFHG  166 (393)
T TIGR02360       111 EAREQAGLKTVYDADDVRLHDLAGDRPEGCHVTFER-DGEEHRIDCDFIAGCDGFHG  166 (393)
T ss_pred             HHHHHCCCCEEEECCCCCCCCCCCCCCCCCEEEEEE-CCCEEEEEEEEEECCCCCCC
T ss_conf             999863895564114321126567888952587778-79177764026752788868