>TIGR01437 selA_rel pyridoxal phosphate-dependent enzyme, putative; InterPro: IPR006337 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 . This entry represents a group of proteins that are related to a number of pyridoxal phosphate-dependent enzymes, and in particular to selenocysteine synthase (SelA), which converts Ser to selenocysteine on its tRNA. While resembling SelA, this protein is found only in species that have a better candidate SelA or else lack the other genes (selB, selC, and selD) required for selenocysteine incorporation. .

Probab=97.15 E-value=0.0098 Score=38.33 Aligned_cols=328 Identities=16% Similarity=0.230 Sum_probs=177.5 Q ss_pred CCEEEECHHHHHHHCCCCC--CHHHHHHHHHHHHHCCCCCCCCCCHHHHHHH-HHHHHHCCCCCCCCCCCCCCCHHHHHH Q ss_conf 9764641022674357878--9999999999997314506875781899999-865201013331235655540356777 Q gi|254780432|r 31 GIPFLDFASGIAVNSLGHS--HPELVAILKSQSEKLWHVSNLYQSTQQEIFA-NHLIHSTFADRVFFTNSGAESVECAIK 107 (392) Q Consensus 31 G~~yiD~~~g~~~~~lGh~--~p~i~~a~~~q~~~~~~~~~~~~~~~~~~la-~~L~~~~~~~~v~f~~SGseA~e~Aik 107 (392) T Consensus 8 lk~ViNa~Gk--MTiLGvs~Vs~ev~~a~~~~~~~F~e------m~~ls~~tGe~~ar~lgvEdayIts~AsAGia~~vA 79 (391) T TIGR01437 8 LKRVINAIGK--MTILGVSKVSDEVLEATKYVSDIFIE------MDDLSRKTGEYIARRLGVEDAYITSGASAGIALAVA 79 (391) T ss_pred CEEEEECCCC--EEECCCCHHHHHHHHHHHHHHHHCEE------HHHHHHHHHHHHHHHHCCCHHHHHHHHHHHHHHHHH T ss_conf 2036723452--13536640369999998756551010------899999999999988443067889878889999999 Q ss_pred H-------HHHHHHCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC-------CCCCCCCCCCCCHHHHHHHHHC Q ss_conf 6-------6543200134786002343546565432123455321134799-------9864333222100268875410 Q gi|254780432|r 108 T-------ARRYHYMAGKTNKFRIVTFEGAFHGRTLATISAGGKLQYLEGF-------GPKIEGFDQAKFCDLQSLKNQI 173 (392) Q Consensus 108 l-------ar~~~~~~g~t~r~~ii~~~~~yHG~t~~a~s~s~~~~~~~~~-------~p~~~~~~~~~~~d~~~l~~~~ 173 (392) T Consensus 80 ali~~g~~ar~~~~~i~e~g~~~~vv~~rgH------------~vdyg~PV~~~i~~gGg~ivE~G~~n~~s~~~lE~~I 147 (391) T TIGR01437 80 ALISKGTRARVIKDIIEEKGRKREVVLQRGH------------NVDYGAPVEDLIALGGGRIVEVGDENLVSEESLEETI 147 (391) T ss_pred HHHCCCCCCEEECCHHHCCCCEEEEEEECCC------------CCCCCCCHHHHHHCCCCCEEEECCCCCCCHHHHHHHH T ss_conf 9751676320110103203340067862787------------4567880899996189948997788875678999999 Q ss_pred CCCCCCCCC----CCCCCCCCCCCCCHHHHHHHHCCCCCCCCEEEECCCCCCCCCCCCCCCCCCCCCCCCEEEC--CCCC Q ss_conf 123322223----3322221124621012322110223457213101100344445553101112454530210--3444 Q gi|254780432|r 174 SNDTAAILI----EPIQGEGGVRKVPEEFLQQLRKICDDIDALLIFDEVQTGYGRTGKLFAYEWANVKPDIMTI--AKGM 247 (392) Q Consensus 174 ~~~iAavi~----Epv~g~~G~~~~~~~~l~~l~~lc~~~g~llI~DEV~tG~GRtG~~f~~e~~gi~PDi~~~--gK~l 247 (392) T Consensus 148 ~~kt~aiLyvksh~~vqk~-ml-~P----~~~~~~vA~~~~vPlIVDAAAe-iPP~edL~~y~~~G--aDlViYSGaKa~ 218 (391) T TIGR01437 148 KEKTAAILYVKSHHLVQKD-ML-LP----VEEVIRVAQSYKVPLIVDAAAE-IPPEEDLTRYLKAG--ADLVIYSGAKAL 218 (391) T ss_pred HHHHHHHHHHHHHCCCCCC-CC-CC----HHHHHHHHHHCCCCEEEECCCC-CCCHHHHHHHHHHC--CCEEEECCHHHC T ss_conf 7734675556532135766-66-63----8999999975689889862568-98801468999716--875553203450 Q ss_pred CCCCC-CCCCCCCCCCCCCCCCCCCCC---------CCCCCCC-----CHHHHHHHHHHHHC---CCCCCHHHHHCCHHH Q ss_conf 44434-432100011122222332234---------5321111-----00123345543201---222101121000026 Q gi|254780432|r 248 GGGFP-IGACLATNEVAACMNQGSHGS---------TYGGNVL-----AMVLGEKVLNIIQS---DGFLENVINIAKILF 309 (392) Q Consensus 248 ~gG~P-~sav~~~~~i~~~~~~~~~~~---------T~~gnpl-----~~aaa~a~L~~l~~---~~l~~~~~~~g~~l~ 309 (392) T Consensus 219 ~g-psnsGl~vGrK~~I~~~~~~g~gseenGPDGtrvfIgRaMKIgKe~ivg~v~AvE~yl~~~~e~~~~k~~~~l~p~a 297 (391) T TIGR01437 219 EG-PSNSGLVVGRKDYIAAAKSQGKGSEENGPDGTRVFIGRAMKIGKENIVGLVAAVERYLTFNDEDWLRKQRSRLDPIA 297 (391) T ss_pred CC-CCCCCEEECHHHHHHHHHHCCCCCCCCCCCCCEEEEECCCCHHHHHHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHH T ss_conf 46-43263233008899999862887656689865688732651036899999999999851687267899999843699 Q ss_pred HHHHHHHHHCCCEEEEECC---CEEE-EEEEEC-----CCHHHHHHHHHHCCE--EEEE--CCCCEEEECCCCCCCHHHH Q ss_conf 8899998867970755046---4009-998724-----998999999996898--9962--6898899558986889999 Q gi|254780432|r 310 EGLTAIKNRFPNMFLEVRG---QGLL-IGLKTV-----FSPALLAAKFRDECL--LTAP--SSDNVVRILPPLTITAEEI 376 (392) Q Consensus 310 ~~L~~l~~~~~~~v~~vRG---~Gl~-~~ie~~-----~~~~~~~~~l~~~Gl--l~~~--~~~~~irl~Ppl~it~~ei 376 (392) T Consensus 298 ~aIs~i~~l~a~iv~D~agnhPR~i~r~rV~v~~~~~Gl~A~eV~~~Lk~~~~aIYtr~YQ~~~G~~~ldpr-~v~e~e~ 376 (391) T TIGR01437 298 EAISDIDDLMAKIVQDEAGNHPRDIYRARVKVDAEEGGLSADEVISRLKAERVAIYTREYQLLDGVLELDPR-SVKEDEM 376 (391) T ss_pred HHHHHHHHCEEEEEECCCCCCCCCEEEEEEEEECCCCCCCHHHHHHHHCCCCCCCHHHHHHHHCCEEEECCC-CCCCCCH T ss_conf 998524101123567688988854368888982222476789999985079995002245544885887661-1361416 Q ss_pred HHHHHHHHHHHHH Q ss_conf 9999999999998 Q gi|254780432|r 377 HEGLERIERTAIK 389 (392) Q Consensus 377 d~~i~~l~~al~~ 389 (392) T Consensus 377 ~~Iv~rL~eI~~~ 389 (391) T TIGR01437 377 ALIVDRLSEIVEK 389 (391) T ss_pred HHHHHHHHHHHHH T ss_conf 8999989999862

HHsearch alignment for GI: 254780432 and conserved domain: TIGR01437