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<entry dataset="TrEMBL" created="2006-05-30" modified="2026-06-10" version="90" xmlns="http://uniprot.org/uniprot">
  <accession>Q1LJT9</accession>
  <name>Q1LJT9_CUPMC</name>
  <protein>
    <recommendedName>
      <fullName evidence="3 9">3-deoxy-D-manno-octulosonic acid transferase</fullName>
      <shortName evidence="9">Kdo transferase</shortName>
      <ecNumber evidence="2 9">2.4.99.12</ecNumber>
    </recommendedName>
    <alternativeName>
      <fullName evidence="5 9">Lipid IV(A) 3-deoxy-D-manno-octulosonic acid transferase</fullName>
    </alternativeName>
  </protein>
  <gene>
    <name evidence="11" type="primary">kdtA</name>
    <name evidence="11" type="ordered locus">Rmet_2714</name>
  </gene>
  <organism evidence="11 12">
    <name type="scientific">Cupriavidus metallidurans (strain ATCC 43123 / DSM 2839 / NBRC 102507 / CH34)</name>
    <name type="common">Ralstonia metallidurans</name>
    <dbReference type="NCBI Taxonomy" id="266264"/>
    <lineage>
      <taxon>Bacteria</taxon>
      <taxon>Pseudomonadati</taxon>
      <taxon>Pseudomonadota</taxon>
      <taxon>Betaproteobacteria</taxon>
      <taxon>Burkholderiales</taxon>
      <taxon>Burkholderiaceae</taxon>
      <taxon>Cupriavidus</taxon>
    </lineage>
  </organism>
  <reference evidence="12" key="1">
    <citation type="journal article" date="2010" name="PLoS ONE" volume="5" first="E10433" last="E10433">
      <title>The complete genome sequence of Cupriavidus metallidurans strain CH34, a master survivalist in harsh and anthropogenic environments.</title>
      <authorList>
        <person name="Janssen P.J."/>
        <person name="Van Houdt R."/>
        <person name="Moors H."/>
        <person name="Monsieurs P."/>
        <person name="Morin N."/>
        <person name="Michaux A."/>
        <person name="Benotmane M.A."/>
        <person name="Leys N."/>
        <person name="Vallaeys T."/>
        <person name="Lapidus A."/>
        <person name="Monchy S."/>
        <person name="Medigue C."/>
        <person name="Taghavi S."/>
        <person name="McCorkle S."/>
        <person name="Dunn J."/>
        <person name="van der Lelie D."/>
        <person name="Mergeay M."/>
      </authorList>
      <dbReference type="PubMed" id="20463976"/>
      <dbReference type="DOI" id="10.1371/journal.pone.0010433"/>
    </citation>
    <scope>NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]</scope>
    <source>
      <strain evidence="12">ATCC 43123 / DSM 2839 / NBRC 102507 / CH34</strain>
    </source>
  </reference>
  <comment type="function">
    <text evidence="9">Involved in lipopolysaccharide (LPS) biosynthesis. Catalyzes the transfer of 3-deoxy-D-manno-octulosonate (Kdo) residue(s) from CMP-Kdo to lipid IV(A), the tetraacyldisaccharide-1,4'-bisphosphate precursor of lipid A.</text>
  </comment>
  <comment type="catalytic activity">
    <reaction evidence="6 9">
      <text>lipid IVA (E. coli) + CMP-3-deoxy-beta-D-manno-octulosonate = alpha-Kdo-(2-&gt;6)-lipid IVA (E. coli) + CMP + H(+)</text>
      <dbReference type="Rhea" id="RHEA:28066"/>
      <dbReference type="ChEBI" id="CHEBI:15378"/>
      <dbReference type="ChEBI" id="CHEBI:58603"/>
      <dbReference type="ChEBI" id="CHEBI:60364"/>
      <dbReference type="ChEBI" id="CHEBI:60377"/>
      <dbReference type="ChEBI" id="CHEBI:85987"/>
      <dbReference type="EC" id="2.4.99.12"/>
    </reaction>
  </comment>
  <comment type="pathway">
    <text evidence="1 9">Bacterial outer membrane biogenesis; LPS core biosynthesis.</text>
  </comment>
  <comment type="subcellular location">
    <subcellularLocation>
      <location evidence="9">Cell membrane</location>
    </subcellularLocation>
  </comment>
  <comment type="similarity">
    <text evidence="9">Belongs to the glycosyltransferase group 1 family.</text>
  </comment>
  <dbReference type="EC" id="2.4.99.12" evidence="2 9"/>
  <dbReference type="EMBL" id="CP000352">
    <property type="protein sequence ID" value="ABF09587.1"/>
    <property type="molecule type" value="Genomic_DNA"/>
  </dbReference>
  <dbReference type="RefSeq" id="WP_011517286.1">
    <property type="nucleotide sequence ID" value="NC_007973.1"/>
  </dbReference>
  <dbReference type="AlphaFoldDB" id="Q1LJT9"/>
  <dbReference type="STRING" id="266264.Rmet_2714"/>
  <dbReference type="KEGG" id="rme:Rmet_2714"/>
  <dbReference type="eggNOG" id="COG1519">
    <property type="taxonomic scope" value="Bacteria"/>
  </dbReference>
  <dbReference type="HOGENOM" id="CLU_036146_2_0_4"/>
  <dbReference type="UniPathway" id="UPA00958"/>
  <dbReference type="Proteomes" id="UP000002429">
    <property type="component" value="Chromosome"/>
  </dbReference>
  <dbReference type="GO" id="GO:0005886">
    <property type="term" value="C:plasma membrane"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="UniProtKB-SubCell"/>
  </dbReference>
  <dbReference type="GO" id="GO:0043842">
    <property type="term" value="F:Kdo transferase activity"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="UniProtKB-EC"/>
  </dbReference>
  <dbReference type="GO" id="GO:0009245">
    <property type="term" value="P:lipid A biosynthetic process"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="TreeGrafter"/>
  </dbReference>
  <dbReference type="GO" id="GO:0009244">
    <property type="term" value="P:lipopolysaccharide core region biosynthetic process"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="UniProtKB-UniRule"/>
  </dbReference>
  <dbReference type="Gene3D" id="3.40.50.11720">
    <property type="entry name" value="3-Deoxy-D-manno-octulosonic-acid transferase, N-terminal domain"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="Gene3D" id="3.40.50.2000">
    <property type="entry name" value="Glycogen Phosphorylase B"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR007507">
    <property type="entry name" value="Glycos_transf_N"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR038107">
    <property type="entry name" value="Glycos_transf_N_sf"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR039901">
    <property type="entry name" value="Kdotransferase"/>
  </dbReference>
  <dbReference type="NCBIfam" id="NF004386">
    <property type="entry name" value="PRK05749.1-2"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="PANTHER" id="PTHR42755:SF1">
    <property type="entry name" value="3-DEOXY-D-MANNO-OCTULOSONIC ACID TRANSFERASE, MITOCHONDRIAL-RELATED"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="PANTHER" id="PTHR42755">
    <property type="entry name" value="3-DEOXY-MANNO-OCTULOSONATE CYTIDYLYLTRANSFERASE"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="Pfam" id="PF04413">
    <property type="entry name" value="Glycos_transf_N"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="SUPFAM" id="SSF53756">
    <property type="entry name" value="UDP-Glycosyltransferase/glycogen phosphorylase"/>
    <property type="match status" value="1"/>
  </dbReference>
  <proteinExistence type="inferred from homology"/>
  <keyword evidence="9" id="KW-1003">Cell membrane</keyword>
  <keyword evidence="9" id="KW-0448">Lipopolysaccharide biosynthesis</keyword>
  <keyword evidence="9" id="KW-0472">Membrane</keyword>
  <keyword evidence="12" id="KW-1185">Reference proteome</keyword>
  <keyword evidence="4 9" id="KW-0808">Transferase</keyword>
  <feature type="domain" description="3-deoxy-D-manno-octulosonic-acid transferase N-terminal" evidence="10">
    <location>
      <begin position="34"/>
      <end position="212"/>
    </location>
  </feature>
  <feature type="active site" description="Proton acceptor" evidence="7">
    <location>
      <position position="61"/>
    </location>
  </feature>
  <feature type="site" description="Transition state stabilizer" evidence="8">
    <location>
      <position position="133"/>
    </location>
  </feature>
  <feature type="site" description="Transition state stabilizer" evidence="8">
    <location>
      <position position="209"/>
    </location>
  </feature>
  <evidence type="ECO:0000256" key="1">
    <source>
      <dbReference type="ARBA" id="ARBA00004713"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="2">
    <source>
      <dbReference type="ARBA" id="ARBA00012621"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="3">
    <source>
      <dbReference type="ARBA" id="ARBA00019077"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="4">
    <source>
      <dbReference type="ARBA" id="ARBA00022679"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="5">
    <source>
      <dbReference type="ARBA" id="ARBA00031445"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="6">
    <source>
      <dbReference type="ARBA" id="ARBA00049183"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="7">
    <source>
      <dbReference type="PIRSR" id="PIRSR639901-1"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="8">
    <source>
      <dbReference type="PIRSR" id="PIRSR639901-2"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="9">
    <source>
      <dbReference type="RuleBase" id="RU365103"/>
    </source>
  </evidence>
  <evidence type="ECO:0000259" key="10">
    <source>
      <dbReference type="Pfam" id="PF04413"/>
    </source>
  </evidence>
  <evidence type="ECO:0000313" key="11">
    <source>
      <dbReference type="EMBL" id="ABF09587.1"/>
    </source>
  </evidence>
  <evidence type="ECO:0000313" key="12">
    <source>
      <dbReference type="Proteomes" id="UP000002429"/>
    </source>
  </evidence>
  <sequence length="424" mass="46321" checksum="04640AA9FB5A4A2D" modified="2006-05-30" version="1">MLRFVYSLLWLLILPLALLRLVWRSRKESGYIQHVGERLGRYGDLSAAGPWLWVHAVSVGETRAAQPLIDALLAAYPRHRLLLTHMTPTGRQTGAQLYGANPRVQQCYLPYDLPWLVRRFLAYFQPDAGLIMETEVWPNLVHVTRRMGVPLFLVNARLSPRSYRRTARFGGAAAALYNDFTMVLAQTAGDAERYRALGVKSVQVTGNLKFDMQPPEAGVARGQLLRQAFGNRHVLAAASTREGEEPLILEAFSRWPGTDRPALLLVPRHPQRFDEVAAMATRAGFSVQRRSALDIEQLSAPITADVVLGDSMGEMAMYYAASDIAYIGGSLIPLGGQNLIEACAVGTPVLMGPHTFNFAQATEDAIAAGACQRVADADELMVAAAAILGDATRLADMREHALTFAGLHRGATARTLGALAPVLR</sequence>
</entry>
<copyright>
Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms Distributed under the Creative Commons Attribution (CC BY 4.0) License
</copyright>
</uniprot>