HHsearch alignment for GI: 254780434 and conserved domain: TIGR00674

>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=95.17  E-value=0.29  Score=28.35  Aligned_cols=19  Identities=16%  Similarity=0.167  Sum_probs=7.6

Q ss_pred             CCCHHHHHHHHHHHHHHHH
Q ss_conf             0697899999999999999
Q gi|254780434|r  321 YEGISLPKRIIQGLSDFLN  339 (362)
Q Consensus       321 ~~Gp~~~~~I~~~L~~~l~  339 (362)
T Consensus       222 ~G~~~~A~EIh~kL~~L~~  240 (288)
T TIGR00674       222 EGDFAEAREIHQKLMPLFK  240 (288)
T ss_pred             CCCHHHHHHHHHHHHHHHH
T ss_conf             3897899999987888988