>gnl|CDD|99747 cd06454, KBL_like, KBL_like; this family belongs to the pyridoxal phosphate (PLP)-dependent aspartate aminotransferase superfamily (fold I). The major groups in this CD corresponds to serine palmitoyltransferase (SPT), 5-aminolevulinate synthase (ALAS), 8-amino-7-oxononanoate synthase (AONS), and 2-amino-3-ketobutyrate CoA ligase (KBL). SPT is responsible for the condensation of L-serine with palmitoyl-CoA to produce 3-ketodihydrospingosine, the reaction of the first step in sphingolipid biosynthesis. ALAS is involved in heme biosynthesis; it catalyzes the synthesis of 5-aminolevulinic acid from glycine and succinyl-coenzyme A. AONS catalyses the decarboxylative condensation of l-alanine and pimeloyl-CoA in the first committed step of biotin biosynthesis. KBL catalyzes the second reaction step of the metabolic degradation pathway for threonine converting 2-amino-3-ketobutyrate, to glycine and acetyl-CoA. The members of this CD are widely found in all three forms of life.. Length = 349

Score = 42.5 bits (101), Expect = 2e-04 Identities = 58/260 (22%), Positives = 98/260 (37%), Gaps = 55/260 (21%) Query: 158 KNRLTERTKLIAITHMSNVLGTVIPIKEICRIAHERNIPVLVD--------GSQGS--VH 207 + R KLI + ++ G + P+ E+ +A + + VD G G Sbjct: 126 EARRPYGKKLIVTEGVYSMDGDIAPLPELVDLAKKYGAILFVDEAHSVGVYGPHGRGVEE 185 Query: 208 NFVDVQDIDCDWYIITG--HKLYGPSGIGGLYSKESRLNEMDPFMGGSEMIADVTQDMVT 265 D+D II G K +G +GG ++ GS+ + D + + Sbjct: 186 FGGLTDDVD----IIMGTLGKAFG--AVGG-------------YIAGSKELIDY---LRS 223 Query: 266 YADLPYRFEPGTPPISQAIALGVALDYV----EKIDRKSIFSYERELARYVRSRLKEVRG 321 YA + F PP + A A AL+ + E+ +R +E RY+R LKE G Sbjct: 224 YAR-GFIFSTSLPP-AVAAAALAALEVLQGGPERRERL------QENVRYLRRGLKE-LG 274 Query: 322 MQLVNESLEDSPIISFRLGNI-HPYDLALFLDGEGIAIRAGTHCANPLLKFLGIDSLCRA 380 + I + + L GI ++A + P + R Sbjct: 275 FPVGGS--PSHIIPPLIGDDPAKAVAFSDALLERGIYVQAIRYPTVPRGT-----ARLRI 327 Query: 381 SLAMYNTYEEADKFIETLKK 400 SL+ +T E+ D+ +E LK+ Sbjct: 328 SLSAAHTKEDIDRLLEALKE 347

RPSBLAST alignment for GI: 254781062 and conserved domain: cd06454