>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=98.61 E-value=7.2e-06 Score=57.68 Aligned_cols=326 Identities=14% Similarity=0.172 Sum_probs=181.6 Q ss_pred EEEEEECC-CCCCCCCC-CHHHHHHHHHHHHHHCCCCCCCHHCCCCCCHHHHHHHHHHHHCCCCCEEEEECCCCCHHHHH Q ss_conf 68998114-47466779-88999999999998298776410002764028999998887349973377405652012220 Q gi|254780604|r 45 RKVTIWCS-NDYLGMGK-HPKVIENAQRTFEKCGIGAGGTRNIAGTNYYHVMLEKELATLHGKKAALIFNSGYIANWATI 122 (401) Q Consensus 45 ~~~l~f~s-ndYLgL~~-~p~v~~a~~~a~~~~G~~~~~sr~~~G~~~~~~~LE~~la~~~g~e~al~~~SG~~An~~~i 122 (401) T Consensus 9 k~ViNa~GkMTiLGvs~Vs~ev~~a~~~~~~~---------F~-em~~ls~~tGe~~ar~lgvEdayIts~AsAGia~~v 78 (391) T TIGR01437 9 KRVINAIGKMTILGVSKVSDEVLEATKYVSDI---------FI-EMDDLSRKTGEYIARRLGVEDAYITSGASAGIALAV 78 (391) T ss_pred EEEEECCCCEEECCCCHHHHHHHHHHHHHHHH---------CE-EHHHHHHHHHHHHHHHHCCCHHHHHHHHHHHHHHHH T ss_conf 03672345213536640369999998756551---------01-089999999999998844306788987888999999 Q ss_pred CCCCCCCCCEEEEH---HH----------HHHH-----HHHHHHHHCCCCEEEECCCC---HHHHHHHHHHCCCCCCCEE Q ss_conf 23467788723421---32----------1116-----75201453165135316799---8898886740663356236 Q gi|254780604|r 123 GTLCSQIDNIICFS---DS----------HNHA-----SIIEGINKARCKKVIWNHND---LEDLEKNLAATDLSIPKII 181 (401) Q Consensus 123 ~~l~~~~d~ii~~~---D~----------~~Ha-----Si~~g~~l~~a~~~~f~HnD---~~~Le~~L~~~~~~~~~iI 181 (401) T Consensus 79 Aali~~g~~ar~~~~~i~e~g~~~~vv~~rgH~vdyg~PV~~~i~~gGg~ivE~G~~n~~s~~~lE~~I~~kt~a---iL 155 (391) T TIGR01437 79 AALISKGTRARVIKDIIEEKGRKREVVLQRGHNVDYGAPVEDLIALGGGRIVEVGDENLVSEESLEETIKEKTAA---IL 155 (391) T ss_pred HHHHCCCCCCEEECCHHHCCCCEEEEEEECCCCCCCCCCHHHHHHCCCCCEEEECCCCCCCHHHHHHHHHHHHHH---HH T ss_conf 997516763201101032033400678627874567880899996189948997788875678999999773467---55 Q ss_pred EC---CCCCCCCCCHHHHHHHHHHHHCCCCEEEECCCCCCCCCCCHHHHHHHHHHCCCCCCHHHCCCCCCCCC-C-EEEE Q ss_conf 21---67435677336899999984014718997121100125602589999972020010110144432222-3-1687 Q gi|254780604|r 182 IF---ESIYSMDGDIAPIKEICDLADQYNAITYIDEVHAVGIHGSCGAGISEREGIMNRITIISGTLAKGFGT-F-GGYI 256 (401) Q Consensus 182 v~---e~v~Sm~G~~apL~~l~~l~~~~~~~LivDEAH~~Gv~G~~G~G~~~~~g~~~~~di~~~TlsKa~g~-~-GG~i 256 (401) T Consensus 156 yvksh~~v-qk~m-l~P~~~~~~vA~~~~vPlIVDAAAe---iPP~ed-L~~y--~~~GaDlViYSGaKa~~gpsnsGl~ 227 (391) T TIGR01437 156 YVKSHHLV-QKDM-LLPVEEVIRVAQSYKVPLIVDAAAE---IPPEED-LTRY--LKAGADLVIYSGAKALEGPSNSGLV 227 (391) T ss_pred HHHHHCCC-CCCC-CCCHHHHHHHHHHCCCCEEEECCCC---CCCHHH-HHHH--HHHCCCEEEECCHHHCCCCCCCCEE T ss_conf 56532135-7666-6638999999975689889862568---988014-6899--9716875553203450464326323 Q ss_pred ECCHHHHHHHHCCCCC---------CCC-CCCC--CCHHHHHHHHHHH-HHHCC-HHHHHHHHHHHHHHHHHHHHC---C Q ss_conf 5484450000013322---------233-3444--4314788998764-32012-016888899998766656644---9 Q gi|254780604|r 257 AASENLCDFIRSFASG---------FIF-STSL--PPAIASASVTSIQ-YIKQH-YDERKKYLERVKQLRHSLENK---A 319 (401) Q Consensus 257 ~g~~~~~~~l~~~~~~---------~if-s~~l--~p~~~aa~~~al~-~l~~~-~~~~~~l~~~~~~l~~~L~~~---g 319 (401) T Consensus 228 vGrK~~I~~~~~~g~gseenGPDGtrvfIgRaMKIgKe~ivg~v~AvE~yl~~~~e~~~~k~~~~l~p~a~aIs~i~~l~ 307 (391) T TIGR01437 228 VGRKDYIAAAKSQGKGSEENGPDGTRVFIGRAMKIGKENIVGLVAAVERYLTFNDEDWLRKQRSRLDPIAEAISDIDDLM 307 (391) T ss_pred ECHHHHHHHHHHCCCCCCCCCCCCCEEEEECCCCHHHHHHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHHHHHHHHHCE T ss_conf 30088999998628876566898656887326510368999999999998516872678999998436999985241011 Q ss_pred CCCC---CCCCC----EEEEEECCHHH---HHHHHHHHHHHCCEEEEEECCCCCCCCCCEEEEECCCCCCHHHHHHHHHH Q ss_conf 8303---78986----59999689799---99999999973790998404888888872189961857999999999999 Q gi|254780604|r 320 IPCI---PNESH----IIPIMVGDSHK---CTQISNILLKEFGIYIQPINYPTVAKKKERLRVTLTPLHTDSDIEHLVSS 389 (401) Q Consensus 320 ~~~~---~~~s~----Ivpi~~g~~~~---~~~~~~~lL~e~Gi~v~~i~~PtVp~g~~rlRi~l~a~ht~edid~~~~~ 389 (401) T Consensus 308 a~iv~D~agnhPR~i~r~rV~v~~~~~Gl~A~eV~~~-Lk~~~~aIYtr~YQ---~~~G~~~ldpr-~v~e~e~~~Iv~r 382 (391) T TIGR01437 308 AKIVQDEAGNHPRDIYRARVKVDAEEGGLSADEVISR-LKAERVAIYTREYQ---LLDGVLELDPR-SVKEDEMALIVDR 382 (391) T ss_pred EEEEECCCCCCCCCEEEEEEEEECCCCCCCHHHHHHH-HCCCCCCCHHHHHH---HHCCEEEECCC-CCCCCCHHHHHHH T ss_conf 2356768898885436888898222247678999998-50799950022455---44885887661-1361416899998 Q ss_pred HHHHHHH Q ss_conf 9999997 Q gi|254780604|r 390 LENVWQK 396 (401) Q Consensus 390 l~~v~~~ 396 (401) T Consensus 383 L~eI~~~ 389 (391) T TIGR01437 383 LSEIVEK 389 (391) T ss_pred HHHHHHH T ss_conf 9999862

HHsearch alignment for GI: 254780604 and conserved domain: TIGR01437