>TIGR00674 dapA dihydrodipicolinate synthase; InterPro: IPR005263 Dihydropicolinate synthase (DHDPS) is the key enzyme in lysine biosynthesis via the diaminopimelate pathway of prokaryotes, some phycomycetes and higher plants. The enzyme catalyses the condensation of L-aspartate-beta-semialdehyde and pyruvate to dihydropicolinic acid via a ping-pong mechanism in which pyruvate binds to the enzyme by forming a Schiff-base with a lysine residue . Three other proteins are structurally related to DHDPS and probably also act via a similar catalytic mechanism. These are Escherichia coli N-acetylneuraminate lyase (4.1.3.3 from EC, IPR005264 from INTERPRO) (gene nanA), which catalyzes the condensation of N-acetyl-D-mannosamine and pyruvate to form N-acetylneuraminate; Sinorhizobium meliloti protein mosA , which is involved in the biosynthesis of the rhizopine 3-O-methyl-scyllo-inosamine; and E. coli hypothetical protein yjhH. The sequences of DHDPS from different sources are well-conserved. The structure takes the form of a homotetramer, in which 2 monomers are related by an approximate 2-fold symmetry . Each monomer comprises 2 domains: an 8-fold alpha-/beta-barrel, and a C-terminal alpha-helical domain. The fold resembles that of N-acetylneuraminate lyase. The active site lysine is located in the barrel domain, and has access via 2 channels on the C-terminal side of the barrel. This family represents a subclass of dihydrodipicolinate synthase. ; GO: 0008840 dihydrodipicolinate synthase activity, 0019877 diaminopimelate biosynthetic process.

Probab=93.15 E-value=0.82 Score=26.11 Aligned_cols=157 Identities=18% Similarity=0.236 Sum_probs=93.3 Q ss_pred CHHHHHHHHHHCCCCEEEEECCCH-------HHHHHHHHHHHHCCC---CCCCCCCCCCCCCCCCCHHHHHHHHHHCCCC Q ss_conf 689999999986998999916798-------778999999985572---3321124454433446788998853100133 Q gi|254780215|r 17 DRHDVIMRAHQANVLKMIAIAIKV-------KDFVPLIKLCQDYPS---SIFCSVGTHPCHAHEENEVLVDELVCLASHP 86 (262) Q Consensus 17 d~~~~i~~a~~~gv~~~i~~~~~~-------~~~~~~~~l~~~~p~---~i~~a~GiHP~~~~~~~~~~~~~l~~l~~~~ 86 (262) T Consensus 20 ~Le~li~~~~~~G~da~V~~GTTGEs~TLs~EE~~~~i~~~~~~~~~R~pvIaG~G------sN~T~Eai~l~-~~a--- 89 (288) T TIGR00674 20 ALEKLIDFQIENGTDAIVVVGTTGESATLSHEEHKKVIEFVVDLVKGRVPVIAGTG------SNATEEAIELT-KFA--- 89 (288) T ss_pred HHHHHHHHHHHHCCCEEEECCCCCCCCCCCHHHHHHHHHHHHHHHCCCEEEEECCC------CCHHHHHHHHH-HHH--- T ss_conf 99999998997079858971355886446888889999999877628778985377------32589999999-999--- Q ss_pred CCCEECCCCCCC------CCCCCCCHHHHHHHHHHHHHHHHCCCCCEEE---CHHHH---HHHHHHHHHHHHC------- Q ss_conf 321004467755------3322111024678999987664204420330---00233---3579998531000------- Q gi|254780215|r 87 RVVAIGETGLDR------YHNAHTIEEQKVVFLRHIEASRITGIPLVIH---SRSAD---DDMAAILQEEMKK------- 147 (262) Q Consensus 87 ~~~aIGEiGLD~------~~~~~~~e~Q~~vF~~ql~lA~e~~~pv~iH---~r~a~---~~~l~iL~~~~~~------- 147 (262) T Consensus 90 -----~~~G~dg~L~vtPyYNKP~q~Gl~~HFka---ia~~~~lPiiLYNvPsRTg~~l~peTv~rLA~~~~NI~aiKEa 161 (288) T TIGR00674 90 -----EKLGVDGFLVVTPYYNKPTQEGLYQHFKA---IAEEVDLPIILYNVPSRTGVSLEPETVKRLAEEPNNIVAIKEA 161 (288) T ss_pred -----HHCCCCEEECCCCCCCCCCCCHHHHHHHH---HHHHCCCCEEEECCCCCCCCCCCHHHHHHHHCCCCCEEEEEEC T ss_conf -----86895688458875518882138999999---9987169889842876410178628999973016770688726 Q ss_pred -----------CCCC-CCCEECCCCHHHHHHHHCCCC--EEECCCCCCHHHHHHHHHHHHC Q ss_conf -----------3675-331121464023443210352--0202332211333223333210 Q gi|254780215|r 148 -----------GPFP-FVIHCFSSSQKLADICLELGG--YISFTGMITFPKYDALRAIARG 194 (262) Q Consensus 148 -----------~~~~-~i~H~FsG~~~~~~~~l~~g~--y~S~~g~i~~~~~~~~~e~v~~ 194 (262) T Consensus 162 ~g~l~~~~~i~~~~p~~dF~vlsGDD~l~l~~~~~Gg~GVISV~~N~~---P~~~~emv~~ 219 (288) T TIGR00674 162 TGNLERISEIKAITPDDDFVVLSGDDALTLPILALGGKGVISVTSNVA---PKLMKEMVEN 219 (288) T ss_pred CCCHHHHHHHHHHCCCCCEEEEECCCCHHHHHHHHCCCEEEEHHHHHH---HHHHHHHHHH T ss_conf 888899999998668985388847861136999818961673005556---8999999999

HHsearch alignment for GI: 254780215 and conserved domain: TIGR00674