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DAPB_EHRCR
ID   DAPB_EHRCR              Reviewed;         267 AA.
AC   Q2GH22;
DT   24-MAR-2009, integrated into UniProtKB/Swiss-Prot.
DT   21-MAR-2006, sequence version 1.
DT   03-AUG-2022, entry version 102.
DE   RecName: Full=4-hydroxy-tetrahydrodipicolinate reductase {ECO:0000255|HAMAP-Rule:MF_00102};
DE            Short=HTPA reductase {ECO:0000255|HAMAP-Rule:MF_00102};
DE            EC=1.17.1.8 {ECO:0000255|HAMAP-Rule:MF_00102};
GN   Name=dapB {ECO:0000255|HAMAP-Rule:MF_00102}; OrderedLocusNames=ECH_0443;
OS   Ehrlichia chaffeensis (strain ATCC CRL-10679 / Arkansas).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Rickettsiales;
OC   Anaplasmataceae; Ehrlichia.
OX   NCBI_TaxID=205920;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC CRL-10679 / Arkansas;
RX   PubMed=16482227; DOI=10.1371/journal.pgen.0020021;
RA   Dunning Hotopp J.C., Lin M., Madupu R., Crabtree J., Angiuoli S.V.,
RA   Eisen J.A., Seshadri R., Ren Q., Wu M., Utterback T.R., Smith S., Lewis M.,
RA   Khouri H., Zhang C., Niu H., Lin Q., Ohashi N., Zhi N., Nelson W.C.,
RA   Brinkac L.M., Dodson R.J., Rosovitz M.J., Sundaram J.P., Daugherty S.C.,
RA   Davidsen T., Durkin A.S., Gwinn M.L., Haft D.H., Selengut J.D.,
RA   Sullivan S.A., Zafar N., Zhou L., Benahmed F., Forberger H., Halpin R.,
RA   Mulligan S., Robinson J., White O., Rikihisa Y., Tettelin H.;
RT   "Comparative genomics of emerging human ehrlichiosis agents.";
RL   PLoS Genet. 2:208-222(2006).
CC   -!- FUNCTION: Catalyzes the conversion of 4-hydroxy-tetrahydrodipicolinate
CC       (HTPA) to tetrahydrodipicolinate. {ECO:0000255|HAMAP-Rule:MF_00102}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(S)-2,3,4,5-tetrahydrodipicolinate + H2O + NAD(+) = (2S,4S)-4-
CC         hydroxy-2,3,4,5-tetrahydrodipicolinate + H(+) + NADH;
CC         Xref=Rhea:RHEA:35323, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:16845, ChEBI:CHEBI:57540, ChEBI:CHEBI:57945,
CC         ChEBI:CHEBI:67139; EC=1.17.1.8; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00102};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(S)-2,3,4,5-tetrahydrodipicolinate + H2O + NADP(+) = (2S,4S)-
CC         4-hydroxy-2,3,4,5-tetrahydrodipicolinate + H(+) + NADPH;
CC         Xref=Rhea:RHEA:35331, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:16845, ChEBI:CHEBI:57783, ChEBI:CHEBI:58349,
CC         ChEBI:CHEBI:67139; EC=1.17.1.8; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00102};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-lysine biosynthesis via DAP
CC       pathway; (S)-tetrahydrodipicolinate from L-aspartate: step 4/4.
CC       {ECO:0000255|HAMAP-Rule:MF_00102}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00102}.
CC   -!- SIMILARITY: Belongs to the DapB family. {ECO:0000255|HAMAP-
CC       Rule:MF_00102}.
CC   -!- CAUTION: Was originally thought to be a dihydrodipicolinate reductase
CC       (DHDPR), catalyzing the conversion of dihydrodipicolinate to
CC       tetrahydrodipicolinate. However, it was shown in E.coli that the
CC       substrate of the enzymatic reaction is not dihydrodipicolinate (DHDP)
CC       but in fact (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinic acid
CC       (HTPA), the product released by the DapA-catalyzed reaction.
CC       {ECO:0000305}.
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DR   EMBL; CP000236; ABD45540.1; -; Genomic_DNA.
DR   RefSeq; WP_011452608.1; NC_007799.1.
DR   AlphaFoldDB; Q2GH22; -.
DR   SMR; Q2GH22; -.
DR   STRING; 205920.ECH_0443; -.
DR   EnsemblBacteria; ABD45540; ABD45540; ECH_0443.
DR   KEGG; ech:ECH_0443; -.
DR   eggNOG; COG0289; Bacteria.
DR   HOGENOM; CLU_047479_2_2_5; -.
DR   OMA; HHPNKAD; -.
DR   OrthoDB; 803114at2; -.
DR   UniPathway; UPA00034; UER00018.
DR   Proteomes; UP000008320; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0008839; F:4-hydroxy-tetrahydrodipicolinate reductase; IEA:UniProtKB-EC.
DR   GO; GO:0051287; F:NAD binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0050661; F:NADP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0016726; F:oxidoreductase activity, acting on CH or CH2 groups, NAD or NADP as acceptor; IEA:UniProtKB-UniRule.
DR   GO; GO:0019877; P:diaminopimelate biosynthetic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0009089; P:lysine biosynthetic process via diaminopimelate; IEA:UniProtKB-UniRule.
DR   HAMAP; MF_00102; DapB; 1.
DR   InterPro; IPR022663; DapB_C.
DR   InterPro; IPR000846; DapB_N.
DR   InterPro; IPR022664; DapB_N_CS.
DR   InterPro; IPR023940; DHDPR_bac.
DR   InterPro; IPR036291; NAD(P)-bd_dom_sf.
DR   PANTHER; PTHR20836; PTHR20836; 1.
DR   Pfam; PF05173; DapB_C; 1.
DR   Pfam; PF01113; DapB_N; 1.
DR   PIRSF; PIRSF000161; DHPR; 1.
DR   SUPFAM; SSF51735; SSF51735; 1.
DR   TIGRFAMs; TIGR00036; dapB; 1.
DR   PROSITE; PS01298; DAPB; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Cytoplasm; Diaminopimelate biosynthesis;
KW   Lysine biosynthesis; NAD; NADP; Oxidoreductase; Reference proteome.
FT   CHAIN           1..267
FT                   /note="4-hydroxy-tetrahydrodipicolinate reductase"
FT                   /id="PRO_1000093968"
FT   ACT_SITE        154
FT                   /note="Proton donor/acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00102"
FT   ACT_SITE        158
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00102"
FT   BINDING         10..15
FT                   /ligand="NAD(+)"
FT                   /ligand_id="ChEBI:CHEBI:57540"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00102"
FT   BINDING         37
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00102"
FT   BINDING         99..101
FT                   /ligand="NAD(+)"
FT                   /ligand_id="ChEBI:CHEBI:57540"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00102"
FT   BINDING         122..125
FT                   /ligand="NAD(+)"
FT                   /ligand_id="ChEBI:CHEBI:57540"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00102"
FT   BINDING         155
FT                   /ligand="(S)-2,3,4,5-tetrahydrodipicolinate"
FT                   /ligand_id="ChEBI:CHEBI:16845"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00102"
FT   BINDING         164..165
FT                   /ligand="(S)-2,3,4,5-tetrahydrodipicolinate"
FT                   /ligand_id="ChEBI:CHEBI:16845"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00102"
SQ   SEQUENCE   267 AA;  29405 MW;  C15738EC6AD1E9B3 CRC64;
     MTRVNIGIVG CLGKQGRRLV SEISASPYAQ VSGGLVRSGN PHVGQILGEV VGCDCSVKIT
     DSLEHLFETS DIVIEFTNPD MLLECIKMAE QKKKPLLSGT TGPAATEMVF EDYIKSIPFL
     WTTNVSFGVN ILAKLVQEAA KKLFDYDIEI WEMHHRYKKD SPSGTSLILG KAAAKGRNVP
     FQMAQYVRGT PQEARKDVNT IGYSVSRGGA DLSDHRVMFV SDEEMIDFNH RTLNKNLYAK
     GALKAALWLV KQPPGVYTMS DMMAAVE
 
 
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