>TIGR00036 dapB dihydrodipicolinate reductase; InterPro: IPR011770 Dihydrodipicolinate reductase is an enzyme found in bacteria and higher plants which is involved in the biosynthesis of diaminopimelic acid, a component of bacterial cell walls, and the essential amino acid L-lysine. It catalyses the the reduced pyridine nucleotide-dependent reduction of the alpha,beta-unsaturated cyclic imine, dihydrodipicolinate, to generate tetrahydrodipicolinate as shown below : 2,3-dihydrodipicolinate + NAD(P)H = 2,3,4,5-tetrahydrodipicolinate + NAD(P)(+) As this enzyme is not found in mammals it is a potential target for the development of novel antibacterial and herbicidal compounds. The structures of the Escherichia coli (P04036 from SWISSPROT) and Mycobacterium tuberculosis (P72024 from SWISSPROT) enzymes have been determined , . The enzyme is a homotetramer where each monomer is composed of two domains, an N-terminal NAD(P)H-binding domain which forms a Rossman fold, and a C-terminal substrate-binding domain that forms an open, mixed alpha-beta sandwich.Tetramerisation occurs exclusively through interactions between C-terminal domain residues. Both enzymes show relatively little preference for either NADH or NADPH as cofactor. Conformational changes upon substrate binding bring the cofactor and substrate into close proximity and allow catalysis to occur. ; GO: 0008839 dihydrodipicolinate reductase activity, 0009089 lysine biosynthetic process via diaminopimelate, 0005737 cytoplasm.

Probab=96.70  E-value=0.0029  Score=37.60  Aligned_cols=58  Identities=17%  Similarity=0.357  Sum_probs=39.7

Q ss_pred             CEEEEECCCCHHHHHHHHHHH---CCCEEEE-ECHHH------------------CCCCCHHHHHHHHH--HCCCCEEEE
Q ss_conf             949999788978899999996---4985999-61367------------------08789999999997--559989997
Q gi|254780921|r    1 MKCLVIGNNGQIAQSLSSMCV---QDVEIIR-VGRPD------------------IDLLKPKDFASFFL--SFSPDVIIN   56 (290)
Q Consensus         1 MkiLVtG~~G~iG~~l~~~l~---~~~~v~~-~~r~~------------------~D~~~~~~~~~~l~--~~~pd~Vih   56 (290)
T Consensus         2 ikvav~GA~GRMG~~~ik~~~~~ye~l~Lv~A~~~~~~~~~G~D~GEl~g~g~~gv~v~~~~~~~~~l~~~~~~~DVliD   81 (281)
T TIGR00036         2 IKVAVAGAAGRMGRELIKAVLQAYEGLKLVAAFERHGSSLQGTDIGELAGIGKVGVPVTDDLEAVLVLAFTETKPDVLID   81 (281)
T ss_pred             CCEEEECCCCHHHHHHHHHHHHHCCCEEEEEEEEECCCCCCCCCCEEEECCCCCCCCHHHHHHHHHHHHHHCCCCCEEEE
T ss_conf             83588478873469999999974898167888861688856654202422554784100057889998740236864787


Q ss_pred             CC
Q ss_conf             86
Q gi|254780921|r   57 PA   58 (290)
Q Consensus        57 ~A   58 (290)
T Consensus        82 FT   83 (281)
T TIGR00036        82 FT   83 (281)
T ss_pred             CC
T ss_conf             38