>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=91.19 E-value=0.83 Score=25.64 Aligned_cols=335 Identities=15% Similarity=0.216 Sum_probs=155.1 Q ss_pred CEEEECHHHHHHHCCCCC--CHHHHHHHHHHHHHHCCHHCCCCCCHHHHHHHHHHHHHCCCCCCCEEECCCCCCHHHHHH Q ss_conf 764641023775367878--999999999999852201024568978999999999720378641110265420256777 Q gi|254780488|r 40 DKIIDAISSWWVITHGHR--HPIIMNAIRSASENYDQIIFSEYTHEPAEQLARLLIKIAPLGLQYVFFSDSGSTSIEVAL 117 (423) Q Consensus 40 ~~~lD~~~g~~~~~lGh~--~~~i~~a~~~q~~~~~~~~~~~~~~~~~~~la~~l~~~~p~~~~~v~f~~SGsEA~e~Al 117 (423) T Consensus 9 k~ViNa~Gk--MTiLGvs~Vs~ev~~a~~~~~~~F~------em~~ls~~tGe~~ar~l--gvEdayIts~AsAGia~~v 78 (391) T TIGR01437 9 KRVINAIGK--MTILGVSKVSDEVLEATKYVSDIFI------EMDDLSRKTGEYIARRL--GVEDAYITSGASAGIALAV 78 (391) T ss_pred EEEEECCCC--EEECCCCHHHHHHHHHHHHHHHHCE------EHHHHHHHHHHHHHHHH--CCCHHHHHHHHHHHHHHHH T ss_conf 036723452--1353664036999999875655101------08999999999999884--4306788987888999999 Q ss_pred H-------HHHHCCCC-CCCCCCEEEEEECCCCCCCCCCCCCCCCCCCCCCCC-C-----CCCCCCCEECCCCCC-CCCC Q ss_conf 7-------64300133-443321134320256653211234322333333222-3-----445421000122222-2211 Q gi|254780488|r 118 K-------MALGFFNN-NNMPRNKIVVMEHGYHGDTIGSMSVSMRGAFNNSYE-P-----LLFDVETIPFPHHNE-EQKT 182 (423) Q Consensus 118 k-------lar~~~~~-~~~~r~~ii~~~~~yHG~t~~a~s~s~~~~~~~~~~-p-----~~~~~~~i~~~~~~~-~~~~ 182 (423) T Consensus 79 Aali~~g~~ar~~~~~i~e~g~~~~vv~~rg----------------H~vdyg~PV~~~i~~gGg~ivE~G~~n~~s~~~ 142 (391) T TIGR01437 79 AALISKGTRARVIKDIIEEKGRKREVVLQRG----------------HNVDYGAPVEDLIALGGGRIVEVGDENLVSEES 142 (391) T ss_pred HHHHCCCCCCEEECCHHHCCCCEEEEEEECC----------------CCCCCCCCHHHHHHCCCCCEEEECCCCCCCHHH T ss_conf 9975167632011010320334006786278----------------745678808999961899489977888756789 Q ss_pred CCHHHHHCCCCCEEEEEC----CCCCCCCCCCCCCCCCCCCEEECCCCCCCCEECCCCCCCCCCCCCCCCCCCCCCCCCC Q ss_conf 110122127751134311----6554321122223332110011011123420001221244445554311223344442 Q gi|254780488|r 183 LDDLEKHCSTQKIAAFLV----EPLILGAGGMQTYRPYILKEFMRITKKYDTLLIADEVMTGWGRTGKIFACNHADITPD 258 (423) Q Consensus 183 l~~l~~~~~~~~iaavi~----EP~i~~~gG~~~~~~~~l~~lr~lc~~~g~llI~DEV~tG~GRtG~~~a~~~~gi~PD 258 (423) T Consensus 143 lE~---~I~~-kt~aiLyvksh~~-vqk~--ml~P----~~~~~~vA~~~~vPlIVDAAAe-iPP~edL~~y~~~G--aD 208 (391) T TIGR01437 143 LEE---TIKE-KTAAILYVKSHHL-VQKD--MLLP----VEEVIRVAQSYKVPLIVDAAAE-IPPEEDLTRYLKAG--AD 208 (391) T ss_pred HHH---HHHH-HHHHHHHHHHHCC-CCCC--CCCC----HHHHHHHHHHCCCCEEEECCCC-CCCHHHHHHHHHHC--CC T ss_conf 999---9977-3467555653213-5766--6663----8999999975689889862568-98801468999716--87 Q ss_pred EEECC--CCCCCCCCC-CCCCCCCHHHHHHHCCCCCC---CCCCCCCCCCCCC--------CCHHHHHCCHHHCCCCCCC Q ss_conf 02013--443322234-44332240132100012222---2222333332222--------1001100000000011233 Q gi|254780488|r 259 ILCLS--KGITGGALP-LAATLCSEEIFDSHLSSDKK---KTFFHSSSYTANP--------IACAAALANLQIWEKEPVI 324 (423) Q Consensus 259 i~~~g--K~l~gG~~p-isav~~~~~i~~~~~~~~~~---~~~~h~~T~~gnp--------l~~aaa~a~L~~i~~~~l~ 324 (423) T Consensus 209 lViYSGaKa~-~g-psnsGl~vGrK~~I~~~~~~g~gseenGPDGtrvfIgRaMKIgKe~ivg~v~AvE~yl~~~~e~~~ 286 (391) T TIGR01437 209 LVIYSGAKAL-EG-PSNSGLVVGRKDYIAAAKSQGKGSEENGPDGTRVFIGRAMKIGKENIVGLVAAVERYLTFNDEDWL 286 (391) T ss_pred EEEECCHHHC-CC-CCCCCEEECHHHHHHHHHHCCCCCCCCCCCCCEEEEECCCCHHHHHHHHHHHHHHHHHCCCCCHHH T ss_conf 5553203450-46-432632330088999998628876566898656887326510368999999999998516872678 Q ss_pred CCCCCHHHHHHHHHHHHHHCCCEEEECCCC-----C-EEEEEECCCCCCCCCHHHHHHHHHHHHCCE--EEEEC--CC-E Q ss_conf 222100267898999975189777774553-----3-999997068766641068999999997885--99951--99-8 Q gi|254780488|r 325 ERIKNLERMHADRLSLLKSNKKFVNIRQMG-----T-IVALDFNVQNKGYFFDKNAKLKNFFREKKI--LIRPL--GH-I 393 (423) Q Consensus 325 ~~~~~~g~~l~~~l~~L~~~~~v~~vrG~G-----l-~~~iel~~~~~~~~~~~~~~l~~~l~~~Gi--l~~~~--gn-~ 393 (423) T Consensus 287 ~k~~~~l~p~a~aIs~i~~l~a~iv~D~agnhPR~i~r~rV~v~~~~~---Gl~A~eV~~~Lk~~~~aIYtr~YQ~~~G~ 363 (391) T TIGR01437 287 RKQRSRLDPIAEAISDIDDLMAKIVQDEAGNHPRDIYRARVKVDAEEG---GLSADEVISRLKAERVAIYTREYQLLDGV 363 (391) T ss_pred HHHHHHHHHHHHHHHHHHHCEEEEEECCCCCCCCCEEEEEEEEECCCC---CCCHHHHHHHHCCCCCCCHHHHHHHHCCE T ss_conf 999998436999985241011235676889888543688889822224---76789999985079995002245544885 Q ss_pred EEECCCCCCCHHHHHHHHHHHHHHHHH Q ss_conf 995689878799999999999999987 Q gi|254780488|r 394 MYLMPPYCITATDLDHIYNTINEAVDF 420 (423) Q Consensus 394 i~l~Ppl~it~~eId~~l~~l~~aL~~ 420 (423) T Consensus 364 ~~ldp-r~v~e~e~~~Iv~rL~eI~~~ 389 (391) T TIGR01437 364 LELDP-RSVKEDEMALIVDRLSEIVEK 389 (391) T ss_pred EEECC-CCCCCCCHHHHHHHHHHHHHH T ss_conf 88766-113614168999989999862

HHsearch alignment for GI: 254780488 and conserved domain: TIGR01437