HHsearch alignment for GI: 254780272 and conserved domain: TIGR01929
>TIGR01929 menB naphthoate synthase; InterPro: IPR010198 This entry represents an enzyme, naphthoate synthase , MenB or dihydroxynaphthoic acid synthetase), which is involved in the fifth step of the menaquinone biosynthesis pathway. Menaquinone (vitamin K2), is an essential quinone used in electron-transfer pathways serving as the major electron carrier during anaerobic growth. In the bacterium, the biosynthetic pathway in bacteria typically comprises 6-7 steps . Together with o-succinylbenzoate-CoA ligase (menE IPR010192 from INTERPRO),MenB takes 2-succinylbenzoate and converts it into 1,4-di-hydroxy-2-naphthoic acid (DHNA) , , , . The conversion of o-succinylbenzoate-CoA ligase to DHNA is mediated by the enzyme DHNA synthase, which is encoded by menB . The protein structure of naphthoate synthase has been expressed in Escherichia coli, purified and crystallized, and found to have fold characteristics of the crotonase family of enzymes, which is notable for the presence of several highly flexible regions around the active site. The C-terminal region of the protein may play a critical role both in completion of the binding pocket and in stabilisation of the hexamer, suggesting a link between oligomerization and catalytic activity . Included in this entry are two enzymes from Arabidopsis thaliana and one from Staphylococcus aureus, which are identified as putative enoyl-CoA hydratase/isomerases. These enzymes group with the naphthoate synthases when building a tree and when doing BLAST searches.; GO: 0008935 naphthoate synthase activity, 0009234 menaquinone biosynthetic process.
Probab=94.64 E-value=0.038 Score=34.03 Aligned_cols=95 Identities=23% Similarity=0.320 Sum_probs=75.5
Q ss_pred HHHHHHHHHCCCCEEEEEECCCCCCCCCCCCCCCCCCEEEC-CCHHHHHHHHHHHH----HHHHHHHHHHHHHHHHHHHH
Q ss_conf 99999986448734899831556652000024677714554-41566441256666----55541289999999999999
Q gi|254780272|r 90 MAIYDTMQFIKPPISTFCMGQAASMGSLLLSAGEKGMRFAL-PNARILLHQPSGGF----SGQASDIERHAQDIVKIKRR 164 (216)
Q Consensus 90 laIyD~i~~i~~~V~Ti~~G~aaS~aslIl~aG~~g~R~~~-pns~iMiHqps~~~----~G~~~di~~~a~el~~~~~~ 164 (216)
T Consensus 105 L~~qr~IR~~PKpVia~V~Gya~GGGh~Lh~~CD--LTiAsre~A~fgQtgpkVGSFDgGyGsa---------------- 166 (278)
T TIGR01929 105 LEVQRLIRTLPKPVIAMVNGYAIGGGHVLHVVCD--LTIASREHARFGQTGPKVGSFDGGYGSA---------------- 166 (278)
T ss_pred HHHHHHHHCCCCCEEEEECCEEECCCEEEHHHHH--HHHHHHHCCCCCCCCCCCCCCCCCHHHH----------------
T ss_conf 6554586418981688753753257620133230--2265321340147887735665634578----------------
Q ss_pred HHHHHHHHCCCCHHHHHHHHCCCCCC-----CHHHHHHCCCCCEEECCCCCCCC
Q ss_conf 99999987199989999972458588-----88999975886446045422510
Q gi|254780272|r 165 LNEIYVKNCGKTYEEVEKTLDRDHIM-----SASEACDWGVVDKVLMSRIDIEE 213 (216)
Q Consensus 165 l~~i~a~~Tg~~~e~i~~~~~rD~~l-----sa~EA~eyGliD~Ii~~~~e~~~ 213 (216)
T Consensus 167 ---YlAR~vGQKk-------aREiwFlcrqY~A~~a~~MG~VN~VV~~-a~Le~ 209 (278)
T TIGR01929 167 ---YLARIVGQKK-------AREIWFLCRQYDAEEAEKMGLVNAVVPL-ADLEK 209 (278)
T ss_pred ---HHHHHHCCCH-------HHHEEECCCCCCHHHHHHCCCCEEECCH-HHHHH
T ss_conf ---9986405500-------0110001563256889737953010035-44558