ID   DAPA_CLOTE              Reviewed;         294 AA.
AC   Q891S3;
DT   30-AUG-2005, integrated into UniProtKB/Swiss-Prot.
DT   01-JUN-2003, sequence version 1.
DT   03-AUG-2022, entry version 108.
DE   RecName: Full=4-hydroxy-tetrahydrodipicolinate synthase {ECO:0000255|HAMAP-Rule:MF_00418};
DE            Short=HTPA synthase {ECO:0000255|HAMAP-Rule:MF_00418};
DE            EC=4.3.3.7 {ECO:0000255|HAMAP-Rule:MF_00418};
GN   Name=dapA {ECO:0000255|HAMAP-Rule:MF_00418}; OrderedLocusNames=CTC_02294;
OS   Clostridium tetani (strain Massachusetts / E88).
OC   Bacteria; Firmicutes; Clostridia; Eubacteriales; Clostridiaceae;
OC   Clostridium.
OX   NCBI_TaxID=212717;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Massachusetts / E88;
RX   PubMed=12552129; DOI=10.1073/pnas.0335853100;
RA   Brueggemann H., Baeumer S., Fricke W.F., Wiezer A., Liesegang H.,
RA   Decker I., Herzberg C., Martinez-Arias R., Merkl R., Henne A.,
RA   Gottschalk G.;
RT   "The genome sequence of Clostridium tetani, the causative agent of tetanus
RT   disease.";
RL   Proc. Natl. Acad. Sci. U.S.A. 100:1316-1321(2003).
CC   -!- FUNCTION: Catalyzes the condensation of (S)-aspartate-beta-semialdehyde
CC       [(S)-ASA] and pyruvate to 4-hydroxy-tetrahydrodipicolinate (HTPA).
CC       {ECO:0000255|HAMAP-Rule:MF_00418}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=L-aspartate 4-semialdehyde + pyruvate = (2S,4S)-4-hydroxy-
CC         2,3,4,5-tetrahydrodipicolinate + H(+) + H2O; Xref=Rhea:RHEA:34171,
CC         ChEBI:CHEBI:15361, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:67139, ChEBI:CHEBI:537519; EC=4.3.3.7;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00418};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-lysine biosynthesis via DAP
CC       pathway; (S)-tetrahydrodipicolinate from L-aspartate: step 3/4.
CC       {ECO:0000255|HAMAP-Rule:MF_00418}.
CC   -!- SUBUNIT: Homotetramer; dimer of dimers. {ECO:0000255|HAMAP-
CC       Rule:MF_00418}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00418}.
CC   -!- SIMILARITY: Belongs to the DapA family. {ECO:0000255|HAMAP-
CC       Rule:MF_00418}.
CC   -!- CAUTION: Was originally thought to be a dihydrodipicolinate synthase
CC       (DHDPS), catalyzing the condensation of (S)-aspartate-beta-semialdehyde
CC       [(S)-ASA] and pyruvate to dihydrodipicolinate (DHDP). However, it was
CC       shown in E.coli that the product of the enzymatic reaction is not
CC       dihydrodipicolinate but in fact (4S)-4-hydroxy-2,3,4,5-tetrahydro-(2S)-
CC       dipicolinic acid (HTPA), and that the consecutive dehydration reaction
CC       leading to DHDP is not spontaneous but catalyzed by DapB.
CC       {ECO:0000305}.
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DR   EMBL; AE015927; AAO36772.1; -; Genomic_DNA.
DR   RefSeq; WP_011100433.1; NC_004557.1.
DR   AlphaFoldDB; Q891S3; -.
DR   SMR; Q891S3; -.
DR   STRING; 212717.CTC_02294; -.
DR   EnsemblBacteria; AAO36772; AAO36772; CTC_02294.
DR   GeneID; 64179629; -.
DR   KEGG; ctc:CTC_02294; -.
DR   HOGENOM; CLU_049343_7_1_9; -.
DR   OMA; MYLTDGK; -.
DR   OrthoDB; 1438588at2; -.
DR   UniPathway; UPA00034; UER00017.
DR   Proteomes; UP000001412; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0008840; F:4-hydroxy-tetrahydrodipicolinate synthase activity; 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-UniPathway.
DR   CDD; cd00950; DHDPS; 1.
DR   Gene3D; 3.20.20.70; -; 1.
DR   HAMAP; MF_00418; DapA; 1.
DR   InterPro; IPR013785; Aldolase_TIM.
DR   InterPro; IPR005263; DapA.
DR   InterPro; IPR002220; DapA-like.
DR   InterPro; IPR020625; Schiff_base-form_aldolases_AS.
DR   InterPro; IPR020624; Schiff_base-form_aldolases_CS.
DR   PANTHER; PTHR12128; PTHR12128; 1.
DR   Pfam; PF00701; DHDPS; 1.
DR   PIRSF; PIRSF001365; DHDPS; 1.
DR   PRINTS; PR00146; DHPICSNTHASE.
DR   SMART; SM01130; DHDPS; 1.
DR   TIGRFAMs; TIGR00674; dapA; 1.
DR   PROSITE; PS00665; DHDPS_1; 1.
DR   PROSITE; PS00666; DHDPS_2; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Cytoplasm; Diaminopimelate biosynthesis; Lyase;
KW   Lysine biosynthesis; Reference proteome; Schiff base.
FT   CHAIN           1..294
FT                   /note="4-hydroxy-tetrahydrodipicolinate synthase"
FT                   /id="PRO_0000103106"
FT   ACT_SITE        134
FT                   /note="Proton donor/acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00418"
FT   ACT_SITE        163
FT                   /note="Schiff-base intermediate with substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00418"
FT   BINDING         46
FT                   /ligand="pyruvate"
FT                   /ligand_id="ChEBI:CHEBI:15361"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00418"
FT   BINDING         205
FT                   /ligand="pyruvate"
FT                   /ligand_id="ChEBI:CHEBI:15361"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00418"
FT   SITE            45
FT                   /note="Part of a proton relay during catalysis"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00418"
FT   SITE            108
FT                   /note="Part of a proton relay during catalysis"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00418"
SQ   SEQUENCE   294 AA;  32152 MW;  5CA1F89AD4F9A618 CRC64;
     MSIFKGSGVA IVTPFCENGV NFKKLEELIE WHIENSTDAI VICGTTGEAS TMTEAEIKET
     IKFTVDKVQG RIPVIAGTGS NNTRKAIELS KWAKSIGVDG LLLITPYYNK TTQKGIVEHF
     KAINDDVDVP IILYNVPGRT GLNILPKTLV KICDTCSNVV AIKEASGDLS QIIEMKALLK
     DRIDIYSGND DQIIPILSIG GIGVISVLAN IMPKEVHDMC ELYLKGKTKK ALEIQLNTLS
     LTNSLFIETN PIPVKTAMNI MGIDVGELRL PLCNMDESNL NLLKKELSNH ALIK