>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=94.88 E-value=0.39 Score=28.43 Aligned_cols=316 Identities=20% Similarity=0.228 Sum_probs=189.9 Q ss_pred CCCCCCHHHHHHHHCCCCCCCCCCCCCCCCCCCCHH--HHHHHHHHHHHHHHHCCCCCEECCCHHHHHHHHHH-HHHHHC Q ss_conf 301029899998305102886579888753360067--99999999999998718863010000167999999-998315 Q gi|254780349|r 41 SENIVSRAVLEAQGSILTNKYAEGYPSKRYYGGCQY--VDDIENIAIERAKKLFNVNFVNVQSHSGSQMNQGV-FLALMH 117 (433) Q Consensus 41 SEN~~S~~v~~~l~S~l~nkyaeG~pg~ryy~G~~~--~d~iE~la~~~a~~lF~a~~anvqp~SG~~An~av-~~ALl~ 117 (433) T Consensus 22 Gvs~Vs~ev~~a~------~~----------~~~~F~em~~ls~~tGe~~ar~lgvEdayI--ts~AsAGia~~vAali~ 83 (391) T TIGR01437 22 GVSKVSDEVLEAT------KY----------VSDIFIEMDDLSRKTGEYIARRLGVEDAYI--TSGASAGIALAVAALIS 83 (391) T ss_pred CCCHHHHHHHHHH------HH----------HHHHCEEHHHHHHHHHHHHHHHHCCCHHHH--HHHHHHHHHHHHHHHHC T ss_conf 6640369999998------75----------655101089999999999998844306788--98788899999999751 Q ss_pred CCCE--EEECCCCC-C---------CC-CCCCCCCCCC--CCCCCCCCCCCCCCCCCCCHHHHHHHHHHHCCCEEEE-EC Q ss_conf 4874--88123344-8---------41-1147665433--3332201366583235659899999998604667897-05 Q gi|254780349|r 118 PGDS--FMGLSLDS-G---------GH-LTHGSSVNMS--GKWFKAIPYNVRKEDGLLDMHEIESLAIEYNPKLIIV-GG 181 (433) Q Consensus 118 pGD~--Il~~~l~~-G---------GH-lshg~~~~~~--g~~~~~~~y~~d~~~~~ID~d~~~~~a~~~kPklIi~-G~ 181 (433) T Consensus 84 ~g~~ar~~~~~i~e~g~~~~vv~~rgH~vdyg~PV~~~i~~gGg~ivE~G~---~n~~s~~~lE~~I~~kt~aiLyvksh 160 (391) T TIGR01437 84 KGTRARVIKDIIEEKGRKREVVLQRGHNVDYGAPVEDLIALGGGRIVEVGD---ENLVSEESLEETIKEKTAAILYVKSH 160 (391) T ss_pred CCCCCEEECCHHHCCCCEEEEEEECCCCCCCCCCHHHHHHCCCCCEEEECC---CCCCCHHHHHHHHHHHHHHHHHHHHH T ss_conf 676320110103203340067862787456788089999618994899778---88756789999997734675556532 Q ss_pred CCCC--CCCCHHHHHHHHHHCCCEEEECCCCHHHHHHHHCCC--CCCCC----CCEEEECCCCCCCCCC-CEEEEECCCC Q ss_conf 5243--536379999886417978991862012443200012--32200----2356740456522567-4489833620 Q gi|254780349|r 182 TAYS--RVWDWERFRSIADSIGAYLMADISHISGLVVGGQHP--SPVPH----CHIVTTTTHKSLRGPR-GGLIMTNHAD 252 (433) Q Consensus 182 S~y~--~~~d~~~l~eIa~~~ga~l~~D~aH~~GLIa~g~~~--~Pl~~----ADvvt~sTHKtl~GPr-gGiI~~~~~e 252 (433) T Consensus 161 ~~vqk~ml~P~~~~~~vA~~~~vPlIVDAAA-------eiPP~edL~~y~~~GaDlViYSGaKa~~gpsnsGl~vGrK-~ 232 (391) T TIGR01437 161 HLVQKDMLLPVEEVIRVAQSYKVPLIVDAAA-------EIPPEEDLTRYLKAGADLVIYSGAKALEGPSNSGLVVGRK-D 232 (391) T ss_pred CCCCCCCCCCHHHHHHHHHHCCCCEEEECCC-------CCCCHHHHHHHHHHCCCEEEECCHHHCCCCCCCCEEECHH-H T ss_conf 1357666663899999997568988986256-------8988014689997168755532034504643263233008-8 Q ss_pred HHHHCCHHHCHH-HHHHHHH-------------HHHHHHHHHHHHHHCHHHHHHHHHHHHHHHHHHHHHH---HCCCCCC Q ss_conf 565016646543-2234455-------------6668999999997356489999999988899999986---1685233 Q gi|254780349|r 253 LAKKINSAIFPG-LQGGPFM-------------HSIAAKAVAFGEALSSEFRDYAKQIVLNSQALAKKLQ---FLGFDIV 315 (433) Q Consensus 253 ~~~~i~~avfPg-~qg~~~~-------------~~iaa~aval~Ea~~~~f~~Ya~qvv~NA~~La~~L~---~~G~~vv 315 (433) T Consensus 233 ~I~~~-~~~g~gseenGPDGtrvfIgRaMKIgKe~ivg~v~AvE~yl~~~~e~~~~k~~~~l~p~a~aIs~i~~l~a~iv 311 (391) T TIGR01437 233 YIAAA-KSQGKGSEENGPDGTRVFIGRAMKIGKENIVGLVAAVERYLTFNDEDWLRKQRSRLDPIAEAISDIDDLMAKIV 311 (391) T ss_pred HHHHH-HHCCCCCCCCCCCCCEEEEECCCCHHHHHHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHHHHHHHHHCEEEEE T ss_conf 99999-86288765668986568873265103689999999999985168726789999984369999852410112356 Q ss_pred CCCCCCC-------EEEECCCCCCCCHHHHHHHHHHCCEEEECCCCCCCCCCCCCCCCCCCCCHHHHHCCCCHHHHHHHH Q ss_conf 4588898-------126316655676799999888567188037899899998889851224666730799989999999 Q gi|254780349|r 316 SGGTDNH-------LMLVDLRSKRMTGKRAESILGRVSITCNKNSIPFDPESPFITSGIRLGTPSGTTRGFKEKDFEYIG 388 (433) Q Consensus 316 ~ggTd~H-------~vlvdl~~~~~~G~~a~~~Le~~gI~~Nkn~iP~D~~~~~~~sGiRlGT~aiTtrG~~e~em~~iA 388 (433) T Consensus 312 ~D~agnhPR~i~r~rV~v~~~~~Gl~A~eV~~~Lk~~~~aIY-------tr~----YQ~~~G~~~ldpr~v~e~e~~~Iv 380 (391) T TIGR01437 312 QDEAGNHPRDIYRARVKVDAEEGGLSADEVISRLKAERVAIY-------TRE----YQLLDGVLELDPRSVKEDEMALIV 380 (391) T ss_pred ECCCCCCCCCEEEEEEEEECCCCCCCHHHHHHHHCCCCCCCH-------HHH----HHHHCCEEEECCCCCCCCCHHHHH T ss_conf 768898885436888898222247678999998507999500-------224----554488588766113614168999 Q ss_pred HHHHHHHHC Q ss_conf 999999602 Q gi|254780349|r 389 ELIAQILDG 397 (433) Q Consensus 389 ~li~~~L~~ 397 (433) T Consensus 381 ~rL~eI~~~ 389 (391) T TIGR01437 381 DRLSEIVEK 389 (391) T ss_pred HHHHHHHHH T ss_conf 989999862

HHsearch alignment for GI: 254780349 and conserved domain: TIGR01437