>TIGR00559 pdxJ pyridoxal phosphate biosynthetic protein PdxJ; InterPro: IPR004569 Pyridoxal phosphate is the active form of vitamin B6 (pyridoxine or pyridoxal). PLP is a versatile catalyst, acting as a coenzyme in a multitude of reactions, including decarboxylation, deamination and transamination , , . PLP-dependent enzymes are primarily involved in the biosynthesis of amino acids and amino acid-derived metabolites, but they are also found in the biosynthetic pathways of amino sugars and in the synthesis or catabolism of neurotransmitters; pyridoxal phosphate can also inhibit DNA polymerases and several steroid receptors . Inadequate levels of pyridoxal phosphate in the brain can cause neurological dysfunction, particularly epilepsy . PLP enzymes exist in their resting state as a Schiff base, the aldehyde group of PLP forming a linkage with the epsilon-amino group of an active site lysine residue on the enzyme. The alpha-amino group of the substrate displaces the lysine epsilon-amino group, in the process forming a new aldimine with the substrate. This aldimine is the common central intermediate for all PLP-catalyzed reactions, enzymatic and non-enzymatic . In Escherichia coli, the pdx genes involved in vitamin B6 have been characterised , , . This entry represents PdxJ, which catalyses the condensation of 1-amino-3-oxo-4-(phosphohydroxy)propan-2-one and 1-deoxy-D-xylulose-5-phosphate to form pyridoxine-5'-phosphate. The product of the PdxJ reaction is then oxidized by PdxH to pyridoxal 5'-phosphate.; GO: 0008615 pyridoxine biosynthetic process, 0005737 cytoplasm.

Probab=100.00 E-value=0 Score=699.91 Aligned_cols=238 Identities=34% Similarity=0.578 Sum_probs=228.1 Q ss_pred CCCCCCHHHHHHHHCCCCCCCCHHHHHHHHHHCC-CCEEEEECCCCCCCCCHHHHHHHHHHHCCCCCCCEEEEEECCCHH Q ss_conf 5332214432232207886899899999999749-989998247883348889999988740001367415888348568 Q gi|254780438|r 4 SVSVNLNAVAVLRNRRNLPWPNLVHIGKIALQSG-ASGLTVHPRPDQRHIRYTDLPEIRRLIDEQFPKAELNIEGYPNET 82 (261) Q Consensus 4 ~LsVNidhiAtLRnaRg~~~P~~~~~a~~~~~~G-adgITvH~R~DrRHI~~~Dv~~l~~~~~~~~~~~elNiEg~p~~e 82 (261) T Consensus 1 rLgvNvdhiaTLR~aR~t~~P~~l~aalia~~~Gkad~ITvHLReDrRHI~~~Dv~~L~~~~-----~~~~NlE~~~~ee 75 (265) T TIGR00559 1 RLGVNVDHIATLRNARGTYEPDPLEAALIAEQAGKADGITVHLREDRRHIQDRDVLKLKEIL-----TTPINLEMAPTEE 75 (265) T ss_pred CCCCCCHHEEEHHHCCCCCCCCHHHHHHHHHHCCCCCEEEECCCCCCCCCCHHHHHHHHHHC-----CCCCCCCCCCHHH T ss_conf 98743013323224168899748899999876288552233388885458867899999873-----8740111585189 Q ss_pred HHHHHHHHC--CCEEEEEECCCCCCCCCCCCCHHHHHHHHHHHHHHHCCCCCEEEEEECCCCCCHHHHHHHHCCCCEEEE Q ss_conf 999998507--212897101655533357822133378899999862026963899725444414799997406614651 Q gi|254780438|r 83 FLNLCERYK--PEQITLVPDDPHQLTSDHGWDFLQNQALLTKTVARLHNLGSRISLFADGNGNEHSLQAAKLTGADCIEL 160 (261) Q Consensus 83 ~i~ia~~ik--P~qvtLVPe~r~elTTegGldv~~~~~~L~~~i~~l~~~girvSLFIDpd~~q~~i~~a~~~Gad~VEl 160 (261) T Consensus 76 ~~~~~~~~knkP~~vTlVPe~r~evTtegGLDva~~~dkL~~~~~~~~~~GI~vSlFId~~~d~--i~~A~e~g~~~iE~ 153 (265) T TIGR00559 76 MIEIAVEIKNKPEKVTLVPEKRDEVTTEGGLDVARLKDKLKELVKRLHEAGIEVSLFIDADKDQ--ISAAAEVGADRIEI 153 (265) T ss_pred HHHHHHHHCCCCCEEEECCCCCCEEECCCCCCHHHHHHHHHHHHHHHHHCCCEEEEEECCCHHH--HHHHHHCCCCEEEE T ss_conf 9999998558997387416988603026440001104679999999986798587742544688--89999708984885 Q ss_pred CCCCCHHHHHH-------------------HHHHHHHHHH----HHHHHHHHHHCCCEEEECCCCCHHHHHHHHHHCC-C Q ss_conf 12111024443-------------------5643366688----9998766541562352078989877999997369-9 Q gi|254780438|r 161 YTGPYGACYNN-------------------PQQERIFLNK----LAITAQLAQKMDLQINAGHDLTIQNIPNLINAIP-Y 216 (261) Q Consensus 161 hTG~Ya~a~~~-------------------~~~~~~el~~----i~~aa~~A~~lgL~VnAGHgLn~~Nl~~~i~~Ip-~ 216 (261) T Consensus 154 hTg~YA~~~~~~~~nannqihaisvlkdksP~e~~~el~~aflq~~~as~~A~~~GL~v~AGHgL~y~Nvk~~~~~l~GY 233 (265) T TIGR00559 154 HTGVYANLYNKLYSNANNQIHAISVLKDKSPKELKEELQRAFLQIKKASVYAKSLGLKVNAGHGLNYHNVKEFAKILEGY 233 (265) T ss_pred ECCHHHHHHHHHHHHHCCCEEEEEEECCCCHHHHHHHHHHHHHHHHHHHHHHHHCCCEEEECCCCCHHHHHHHHHCCCCH T ss_conf 02246898887741001321223111158868999999899999999999998749868614888778999998617401 Q ss_pred CEEEEEHHHHHHHHHHHHHHHHHHHHHHHHHH Q ss_conf 63884259999999994099999999999974 Q gi|254780438|r 217 ISEISVGHAFAATALECGVKEAVFCFRRACGQ 248 (261) Q Consensus 217 I~EvsIGHaiIseAl~~GL~~aI~~~~~ii~~ 248 (261) T Consensus 234 l~ElnIGHa~va~Av~~GLe~ai~em~~l~~~ 265 (265) T TIGR00559 234 LDELNIGHAIVAKAVLLGLEEAIREMRDLIKE 265 (265) T ss_pred HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCC T ss_conf 10241138999999997499999999998519

HHsearch alignment for GI: 254780438 and conserved domain: TIGR00559