>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=99.59 E-value=5.4e-15 Score=114.15 Aligned_cols=346 Identities=15% Similarity=0.201 Sum_probs=203.2 Q ss_pred CCEEEEECCCCCCCCHHHHHHHHHHHHHHCCCCCCHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCCCCHHHHHHHH Q ss_conf 86599766888898989999999999861498660267999999999999999999982879765433468768987654 Q gi|254781062|r 22 KPLIYFDNAASAQKPQDVIDSIMCTYSHEYANIHRGLHYMANAVTDKYEKARDKVRRFINASSVKEIIFTRSATESINLV 101 (406) Q Consensus 22 ~~~iYld~a~~~~~~~~V~~a~~~~~~~~~~n~~~~~~~~~~~~~~~~~~aR~~ia~~lga~~~~~v~ft~~~Te~~n~~ 101 (406) T Consensus 16 GkMTiL---Gvs~Vs~ev~~a~~-~~~~~F~em----~~ls~~-------tGe~~ar~lgvEda---yIts~AsAGia~~ 77 (391) T TIGR01437 16 GKMTIL---GVSKVSDEVLEATK-YVSDIFIEM----DDLSRK-------TGEYIARRLGVEDA---YITSGASAGIALA 77 (391) T ss_pred CCEEEC---CCCHHHHHHHHHHH-HHHHHCEEH----HHHHHH-------HHHHHHHHHCCCHH---HHHHHHHHHHHHH T ss_conf 521353---66403699999987-565510108----999999-------99999988443067---8898788899999 Q ss_pred HHHHHHHHHHCCCCCCCCH-------------HHHHHHHH-HCCCCCCCCCCCCCCCCCCCCCCCHHHHHHHHCCCCCCC Q ss_conf 3223444320134434540-------------11000010-000122223222222222222210257887510233443 Q gi|254781062|r 102 SYGWGARHISTGDEIVLSV-------------MEHHSNII-PWYFLRQRRGASLVWVPIDNQGFFHIDEFKNRLTERTKL 167 (406) Q Consensus 102 ~~~~~~~~~~~gd~Vi~s~-------------~eh~s~~~-~~~~~~~~~G~~v~~i~~~~~g~id~~~l~~~i~~~t~l 167 (406) T Consensus 78 vAali~--~g~~ar~~~~~i~e~g~~~~vv~~rgH~vdyg~PV~~~i~~gGg~ivE--~G~~n~~s~~~lE~~I~~kt~a 153 (391) T TIGR01437 78 VAALIS--KGTRARVIKDIIEEKGRKREVVLQRGHNVDYGAPVEDLIALGGGRIVE--VGDENLVSEESLEETIKEKTAA 153 (391) T ss_pred HHHHHC--CCCCCEEECCHHHCCCCEEEEEEECCCCCCCCCCHHHHHHCCCCCEEE--ECCCCCCCHHHHHHHHHHHHHH T ss_conf 999751--676320110103203340067862787456788089999618994899--7788875678999999773467 Q ss_pred C-CC-CCCCCCCCCCCCCCCEECCCCCCCCCCCCCCCC-CCCCCCC-CHHHHCCCCCCCCCCC-CCCCCCCCHHHCCCCC Q ss_conf 3-22-222222333333321000234444310123320-0011100-0011001122234322-2354443100025666 Q gi|254781062|r 168 I-AI-THMSNVLGTVIPIKEICRIAHERNIPVLVDGSQ-GSVHNFV-DVQDIDCDWYIITGHK-LYGPSGIGGLYSKESR 242 (406) Q Consensus 168 v-~i-~~~~~~tG~~~pi~~I~~~~~~~g~~~~vD~aq-~~g~~~i-d~~~~~~D~~~~S~hK-~~Gp~G~G~l~~~~~~ 242 (406) T Consensus 154 iLyvksh~~vqk~ml~P~~~~~~vA~~~~vPlIVDAAAeiPP~edL~~y~~~GaDlViYSGaKa~~gpsnsGl~vGrK~~ 233 (391) T TIGR01437 154 ILYVKSHHLVQKDMLLPVEEVIRVAQSYKVPLIVDAAAEIPPEEDLTRYLKAGADLVIYSGAKALEGPSNSGLVVGRKDY 233 (391) T ss_pred HHHHHHHCCCCCCCCCCHHHHHHHHHHCCCCEEEECCCCCCCHHHHHHHHHHCCCEEEECCHHHCCCCCCCCEEECHHHH T ss_conf 55565321357666663899999997568988986256898801468999716875553203450464326323300889 Q ss_pred CCCCEEECCCCEEEEEEECCCCCCCCCHHCCCCCCCCCHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCEE Q ss_conf 31001211453034332024530033100000122120245664210123322222222222222222222222222101 Q gi|254781062|r 243 LNEMDPFMGGSEMIADVTQDMVTYADLPYRFEPGTPPISQAIALGVALDYVEKIDRKSIFSYERELARYVRSRLKEVRGM 322 (406) Q Consensus 243 ~~~~~p~~~g~~~~~~~~~~~~~~~~~~~r~e~Gt~~~~~~~al~~al~~~~~~g~~~i~~~~~~l~~~l~~~L~~~~g~ 322 (406) T Consensus 234 I~~~~~~g~gsee-nGPD---GtrvfIgRaMKIgKe~---ivg~v~AvE~yl~~~~e~~~~k~~~~l~p~a~aIs~i~~l 306 (391) T TIGR01437 234 IAAAKSQGKGSEE-NGPD---GTRVFIGRAMKIGKEN---IVGLVAAVERYLTFNDEDWLRKQRSRLDPIAEAISDIDDL 306 (391) T ss_pred HHHHHHCCCCCCC-CCCC---CCEEEEECCCCHHHHH---HHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHHHHHHHHHC T ss_conf 9999862887656-6898---6568873265103689---9999999999851687267899999843699998524101 Q ss_pred ---EECCCCC---CCCCE----EEEEECCCCHHHHHHHHHHCCCEEEECCHHHHHHHHHCCCCCEEEEEECCCCCHHHHH Q ss_conf ---3226852---15867----9998089999999999987896999752112788997289957999935888999999 Q gi|254781062|r 323 ---QLVNESL---EDSPI----ISFRLGNIHPYDLALFLDGEGIAIRAGTHCANPLLKFLGIDSLCRASLAMYNTYEEAD 392 (406) Q Consensus 323 ---~i~~~~~---~~~~i----v~~~~~~~~~~~v~~~L~~~gI~v~~G~~ca~~~~~~~g~~~~iRiS~~~~nt~edid 392 (406) T Consensus 307 ~a~iv~D~agnhPR~i~r~rV~v~~~~~Gl~A~eV~~~Lk~~~~aIYt-----r~Y---Q~~~G~~~ldpr-~v~e~e~~ 377 (391) T TIGR01437 307 MAKIVQDEAGNHPRDIYRARVKVDAEEGGLSADEVISRLKAERVAIYT-----REY---QLLDGVLELDPR-SVKEDEMA 377 (391) T ss_pred EEEEEECCCCCCCCCEEEEEEEEECCCCCCCHHHHHHHHCCCCCCCHH-----HHH---HHHCCEEEECCC-CCCCCCHH T ss_conf 123567688988854368888982222476789999985079995002-----245---544885887661-13614168 Q ss_pred HHHHHHHHHHHHH Q ss_conf 9999999999971 Q gi|254781062|r 393 KFIETLKKSIQFF 405 (406) Q Consensus 393 ~~i~~l~~~i~~l 405 (406) T Consensus 378 ~Iv~rL~eI~~~~ 390 (391) T TIGR01437 378 LIVDRLSEIVEKE 390 (391) T ss_pred HHHHHHHHHHHHC T ss_conf 9999899998621

HHsearch alignment for GI: 254781062 and conserved domain: TIGR01437