>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=96.66 E-value=0.0032 Score=41.95 Aligned_cols=160 Identities=21% Similarity=0.346 Sum_probs=78.1 Q ss_pred CCCCEEEECCCHHHHHHHHHHHHCCCCEEEEECCCC---CC----EEEEEECCCCHHHHHHHHHHHHHHHH-HHHHCCEE Q ss_conf 933199998986689999999987993999937997---15----02513667370989999999999998-66755816 Q gi|254781053|r 1 MVYDVAVVGGGPAGYACAIKAAQLKNKVAIIEKEKT---YG----GTCLNIGCIPSKALLHASEMYSHIAK-EAGDLGIN 72 (466) Q Consensus 1 M~YDvvIIG~G~AG~~aA~~~~~~G~~V~lIE~~~~---~G----GtC~~~GCiPsK~l~~~a~~~~~~~~-~~~~~g~~ 72 (466) T Consensus 1 MkTqVaIiG~GPsGLLLGQLLh~~GId~viLEr~~~dYVlgRIRAGv-LE~g~v---~LL~~agv~~Rm~~eG~~H~G~~ 76 (393) T TIGR02360 1 MKTQVAIIGAGPSGLLLGQLLHKAGIDTVILERKSRDYVLGRIRAGV-LEQGTV---DLLREAGVDERMDREGLVHEGIE 76 (393) T ss_pred CCEEEEEECCCHHHHHHHHHHHHCCCCEEEEECCCHHHHHHHHCCCH-HHHHHH---HHHHHHHHHHHHHHCCCCCCCEE T ss_conf 95179997577357899999986698589972357223433210123-578999---99987223223453587325654 Q ss_pred C----CCCCCCHHHHHH------H-HHHHHHHHHH-----HHHHHHHCCCEEEEEEEEEECCCC---CCCCCCCCCCCCC Q ss_conf 4----775328999999------9-9999998777-----778764004310110011100222---1023575211232 Q gi|254781053|r 73 I----ASCHLDLKKMMS------Y-KKSIVESNTQ-----GINFLLKKNKIITYHGSARIVSNN---KILVKGSSSEETI 133 (466) Q Consensus 73 ~----~~~~~d~~~~~~------~-~~~~v~~~~~-----~~~~~~~~~~V~~~~g~a~~~~~~---~v~V~~~~~~~~i 133 (466) T Consensus 77 ia~~g~~~riDl~~~tGG~~V~VYGQTEvtrDL~~ARe~~G~~~v~~a~~V~~HD~~---~~~P~gc~VT~~~dG~~~~~ 153 (393) T TIGR02360 77 IAFDGQRFRIDLKALTGGKTVMVYGQTEVTRDLYEAREQAGLKTVYDADDVRLHDLA---GDRPEGCHVTFERDGEEHRI 153 (393) T ss_pred EECCCCEEECCHHHHCCCCEEEEECCHHHHHHHHHHHHHCCCCEEEECCCCCCCCCC---CCCCCCCEEEEEECCCEEEE T ss_conf 501782420007660589789997661577889999986389556411432112656---78889525877787917776 Q ss_pred CCEEECCCCC----CCCCCCCCCC-CCCCCEEEEEECCCC Q ss_conf 2100004676----6524445766-532100245305741 Q gi|254781053|r 134 EAKNIVIATG----SEASGLPGMS-IDFDEQVIVSSTGAL 168 (466) Q Consensus 134 ~ad~iviATG----s~p~~iP~~~-~~~~~~~~~t~~~~~ 168 (466) T Consensus 154 dCDfIAGCDGFHGvSR~-siP~~~~k~fErVYPFGWLGiL 192 (393) T TIGR02360 154 DCDFIAGCDGFHGVSRA-SIPAEVLKEFERVYPFGWLGIL 192 (393) T ss_pred EEEEEECCCCCCCCCCC-CCCHHHHHCCCCCCCCCCHHHH T ss_conf 40267527888686544-5651241112450676200120

HHsearch alignment for GI: 254781053 and conserved domain: TIGR02360