ID   KDSA_CAMJE              Reviewed;         271 AA.
AC   Q9PIB8; Q0PBC6;
DT   10-MAY-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2000, sequence version 1.
DT   10-JUN-2026, entry version 135.
DE   RecName: Full=2-dehydro-3-deoxyphosphooctonate aldolase {ECO:0000255|HAMAP-Rule:MF_00056};
DE            EC=2.5.1.55 {ECO:0000255|HAMAP-Rule:MF_00056};
DE   AltName: Full=3-deoxy-D-manno-octulosonic acid 8-phosphate synthase {ECO:0000255|HAMAP-Rule:MF_00056};
DE   AltName: Full=KDO-8-phosphate synthase {ECO:0000255|HAMAP-Rule:MF_00056};
DE            Short=KDO 8-P synthase {ECO:0000255|HAMAP-Rule:MF_00056};
DE            Short=KDOPS {ECO:0000255|HAMAP-Rule:MF_00056};
DE   AltName: Full=Phospho-2-dehydro-3-deoxyoctonate aldolase {ECO:0000255|HAMAP-Rule:MF_00056};
GN   Name=kdsA {ECO:0000255|HAMAP-Rule:MF_00056};
GN   OrderedLocusNames=Cj0384c;
OS   Campylobacter jejuni subsp. jejuni serotype O:2 (strain ATCC 700819 /
OS   NCTC 11168).
OC   Bacteria; Pseudomonadati; Campylobacterota; Epsilonproteobacteria;
OC   Campylobacterales; Campylobacteraceae; Campylobacter.
OX   NCBI_TaxID=192222;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 700819 / NCTC 11168;
RX   PubMed=10688204; DOI=10.1038/35001088;
RA   Parkhill J., Wren B.W., Mungall K.L., Ketley J.M., Churcher C.M.,
RA   Basham D., Chillingworth T., Davies R.M., Feltwell T., Holroyd S.,
RA   Jagels K., Karlyshev A.V., Moule S., Pallen M.J., Penn C.W., Quail M.A.,
RA   Rajandream M.A., Rutherford K.M., van Vliet A.H.M., Whitehead S.,
RA   Barrell B.G.;
RT   "The genome sequence of the food-borne pathogen Campylobacter jejuni
RT   reveals hypervariable sequences.";
RL   Nature 403:665-668(2000).
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=D-arabinose 5-phosphate + phosphoenolpyruvate + H2O = 3-deoxy-
CC         alpha-D-manno-2-octulosonate-8-phosphate + phosphate;
CC         Xref=Rhea:RHEA:14053, ChEBI:CHEBI:15377, ChEBI:CHEBI:43474,
CC         ChEBI:CHEBI:57693, ChEBI:CHEBI:58702, ChEBI:CHEBI:85985; EC=2.5.1.55;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00056};
CC   -!- PATHWAY: Carbohydrate biosynthesis; 3-deoxy-D-manno-octulosonate
CC       biosynthesis; 3-deoxy-D-manno-octulosonate from D-ribulose 5-phosphate:
CC       step 2/3. {ECO:0000255|HAMAP-Rule:MF_00056}.
CC   -!- PATHWAY: Bacterial outer membrane biogenesis; lipopolysaccharide
CC       biosynthesis. {ECO:0000255|HAMAP-Rule:MF_00056}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00056,
CC       ECO:0000255|PROSITE-ProRule:PRU01406}.
CC   -!- SIMILARITY: Belongs to the class-I DAHP synthase family. KdsA
CC       subfamily. {ECO:0000255|PROSITE-ProRule:PRU01406}.
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DR   EMBL; AL111168; CAL34534.1; -; Genomic_DNA.
DR   PIR; F81381; F81381.
DR   RefSeq; WP_002858652.1; NC_002163.1.
DR   RefSeq; YP_002343821.1; NC_002163.1.
DR   AlphaFoldDB; Q9PIB8; -.
DR   SMR; Q9PIB8; -.
DR   IntAct; Q9PIB8; 3.
DR   STRING; 192222.Cj0384c; -.
DR   PaxDb; 192222-Cj0384c; -.
DR   EnsemblBacteria; CAL34534; CAL34534; Cj0384c.
DR   GeneID; 904707; -.
DR   KEGG; cje:Cj0384c; -.
DR   PATRIC; fig|192222.6.peg.375; -.
DR   eggNOG; COG2877; Bacteria.
DR   HOGENOM; CLU_036666_0_0_7; -.
DR   OrthoDB; 9802281at2; -.
DR   UniPathway; UPA00030; -.
DR   UniPathway; UPA00357; UER00474.
DR   Proteomes; UP000000799; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0008676; F:3-deoxy-8-phosphooctulonate synthase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0019294; P:keto-3-deoxy-D-manno-octulosonic acid biosynthetic process; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.20.20.70; Aldolase class I; 1.
DR   HAMAP; MF_00056; KDO8P_synth; 1.
DR   InterPro; IPR013785; Aldolase_TIM.
DR   InterPro; IPR006218; DAHP1/KDSA.
DR   InterPro; IPR006269; KDO8P_synthase.
DR   NCBIfam; TIGR01362; KDO8P_synth; 1.
DR   NCBIfam; NF003543; PRK05198.1; 1.
DR   PANTHER; PTHR21057; PHOSPHO-2-DEHYDRO-3-DEOXYHEPTONATE ALDOLASE; 1.
DR   Pfam; PF00793; DAHP_synth_1; 1.
DR   SUPFAM; SSF51569; Aldolase; 1.
DR   PROSITE; PS52061; DAHPS_I; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Lipopolysaccharide biosynthesis; Reference proteome;
KW   Transferase.
FT   CHAIN           1..271
FT                   /note="2-dehydro-3-deoxyphosphooctonate aldolase"
FT                   /id="PRO_0000187112"
FT   DOMAIN          1..268
FT                   /note="DAHPS class-I TIM-barrel"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01406"
FT   BINDING         11
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01406"
FT   BINDING         40
FT                   /ligand="phosphoenolpyruvate"
FT                   /ligand_id="ChEBI:CHEBI:58702"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01406"
FT   BINDING         45
FT                   /ligand="phosphoenolpyruvate"
FT                   /ligand_id="ChEBI:CHEBI:58702"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01406"
FT   BINDING         123
FT                   /ligand="phosphoenolpyruvate"
FT                   /ligand_id="ChEBI:CHEBI:58702"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01406"
FT   BINDING         164
FT                   /ligand="phosphoenolpyruvate"
FT                   /ligand_id="ChEBI:CHEBI:58702"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01406"
FT   BINDING         195
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01406"
FT   BINDING         232
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01406"
FT   BINDING         243
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01406"
SQ   SEQUENCE   271 AA;  29780 MW;  4A2323A9C7BFCE28 CRC64;
     MKKMILIAGP CVIESKDLIF KVAEQLKNFN ENPNIEFYFK SSFDKANRTS INSFRGPGLE
     EGLKILQSVK DEFGMKILTD IHESNQANPV SEVADVLQIP AFLCRQTDLL VAAAKTKAKI
     NIKKGQFLNP SDIKYSVKKV LQTRGIEDEG YEAAQRNGVF VAERGASFGY GNLVVDMRSL
     VIMREFAPVI FDATHSVQMP GAAGGSSGGK SEFVEPLARA AAAVGIDGFF FETHINPCEA
     LCDGPNMLNL TRLKNCVNTL LEIQNIIKEN K
//