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<entry dataset="Swiss-Prot" created="2002-11-08" modified="2026-09-02" version="137" xmlns="http://uniprot.org/uniprot">
  <accession>Q8K9T9</accession>
  <name>ODP1_BUCAP</name>
  <protein>
    <recommendedName>
      <fullName>Pyruvate dehydrogenase E1 component</fullName>
      <shortName>PDH E1 component</shortName>
      <ecNumber>1.2.4.1</ecNumber>
    </recommendedName>
  </protein>
  <gene>
    <name type="primary">aceE</name>
    <name type="ordered locus">BUsg_199</name>
  </gene>
  <organism>
    <name type="scientific">Buchnera aphidicola subsp. Schizaphis graminum (strain Sg)</name>
    <dbReference type="NCBI Taxonomy" id="198804"/>
    <lineage>
      <taxon>Bacteria</taxon>
      <taxon>Pseudomonadati</taxon>
      <taxon>Pseudomonadota</taxon>
      <taxon>Gammaproteobacteria</taxon>
      <taxon>Enterobacterales</taxon>
      <taxon>Erwiniaceae</taxon>
      <taxon>Buchnera</taxon>
    </lineage>
  </organism>
  <reference key="1">
    <citation type="journal article" date="2002" name="Science" volume="296" first="2376" last="2379">
      <title>50 million years of genomic stasis in endosymbiotic bacteria.</title>
      <authorList>
        <person name="Tamas I."/>
        <person name="Klasson L."/>
        <person name="Canbaeck B."/>
        <person name="Naeslund A.K."/>
        <person name="Eriksson A.-S."/>
        <person name="Wernegreen J.J."/>
        <person name="Sandstroem J.P."/>
        <person name="Moran N.A."/>
        <person name="Andersson S.G.E."/>
      </authorList>
      <dbReference type="PubMed" id="12089438"/>
      <dbReference type="DOI" id="10.1126/science.1071278"/>
    </citation>
    <scope>NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]</scope>
    <source>
      <strain>Sg</strain>
    </source>
  </reference>
  <comment type="function">
    <text evidence="1">Component of the pyruvate dehydrogenase (PDH) complex, that catalyzes the overall conversion of pyruvate to acetyl-CoA and CO(2).</text>
  </comment>
  <comment type="catalytic activity">
    <reaction>
      <text>N(6)-[(R)-lipoyl]-L-lysyl-[protein] + pyruvate + H(+) = N(6)-[(R)-S(8)-acetyldihydrolipoyl]-L-lysyl-[protein] + CO2</text>
      <dbReference type="Rhea" id="RHEA:19189"/>
      <dbReference type="Rhea" id="RHEA-COMP:10474"/>
      <dbReference type="Rhea" id="RHEA-COMP:10478"/>
      <dbReference type="ChEBI" id="CHEBI:15361"/>
      <dbReference type="ChEBI" id="CHEBI:15378"/>
      <dbReference type="ChEBI" id="CHEBI:16526"/>
      <dbReference type="ChEBI" id="CHEBI:83099"/>
      <dbReference type="ChEBI" id="CHEBI:83111"/>
      <dbReference type="EC" id="1.2.4.1"/>
    </reaction>
  </comment>
  <comment type="cofactor">
    <cofactor evidence="1">
      <name>thiamine diphosphate</name>
      <dbReference type="ChEBI" id="CHEBI:58937"/>
    </cofactor>
  </comment>
  <comment type="subunit">
    <text evidence="1">Homodimer. Part of the PDH complex, consisting of multiple copies of pyruvate dehydrogenase (E1), dihydrolipoamide acetyltransferase (E2) and lipoamide dehydrogenase (E3).</text>
  </comment>
  <dbReference type="EC" id="1.2.4.1"/>
  <dbReference type="EMBL" id="AE013218">
    <property type="protein sequence ID" value="AAM67763.1"/>
    <property type="molecule type" value="Genomic_DNA"/>
  </dbReference>
  <dbReference type="RefSeq" id="WP_011053730.1">
    <property type="nucleotide sequence ID" value="NC_004061.1"/>
  </dbReference>
  <dbReference type="AlphaFoldDB" id="Q8K9T9"/>
  <dbReference type="SMR" id="Q8K9T9"/>
  <dbReference type="STRING" id="198804.BUsg_199"/>
  <dbReference type="GeneID" id="93003666"/>
  <dbReference type="KEGG" id="bas:BUsg_199"/>
  <dbReference type="eggNOG" id="COG2609">
    <property type="taxonomic scope" value="Bacteria"/>
  </dbReference>
  <dbReference type="HOGENOM" id="CLU_009154_2_0_6"/>
  <dbReference type="Proteomes" id="UP000000416">
    <property type="component" value="Chromosome"/>
  </dbReference>
  <dbReference type="GO" id="GO:0000287">
    <property type="term" value="F:magnesium ion binding"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="UniProtKB-ARBA"/>
  </dbReference>
  <dbReference type="GO" id="GO:0004739">
    <property type="term" value="F:pyruvate dehydrogenase (acetyl-transferring) activity"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="UniProtKB-EC"/>
  </dbReference>
  <dbReference type="CDD" id="cd02017">
    <property type="entry name" value="TPP_E1_EcPDC_like"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="FunFam" id="3.40.50.970:FF:000009">
    <property type="entry name" value="Pyruvate dehydrogenase E1 component"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="FunFam" id="3.40.50.970:FF:000011">
    <property type="entry name" value="Pyruvate dehydrogenase E1 component"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="Gene3D" id="3.40.50.920">
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="Gene3D" id="3.40.50.970">
    <property type="match status" value="2"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR035807">
    <property type="entry name" value="PDC_E1_N"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR051157">
    <property type="entry name" value="PDH/Transketolase"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR004660">
    <property type="entry name" value="PDH_E1"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR041621">
    <property type="entry name" value="PDH_E1_M"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR060495">
    <property type="entry name" value="PDH_E1_N"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR029061">
    <property type="entry name" value="THDP-binding"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR009014">
    <property type="entry name" value="Transketo_C/PFOR_II"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR055152">
    <property type="entry name" value="Transketolase-like_C_2"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR005474">
    <property type="entry name" value="Transketolase_N"/>
  </dbReference>
  <dbReference type="NCBIfam" id="TIGR00759">
    <property type="entry name" value="aceE"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="PANTHER" id="PTHR43825">
    <property type="entry name" value="PYRUVATE DEHYDROGENASE E1 COMPONENT"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="PANTHER" id="PTHR43825:SF3">
    <property type="entry name" value="PYRUVATE DEHYDROGENASE E1 COMPONENT"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="Pfam" id="PF17831">
    <property type="entry name" value="PDH_E1_M"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="Pfam" id="PF28598">
    <property type="entry name" value="PDH_E1_N"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="Pfam" id="PF22613">
    <property type="entry name" value="Transketolase_C_1"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="Pfam" id="PF00456">
    <property type="entry name" value="Transketolase_N"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="PIRSF" id="PIRSF000156">
    <property type="entry name" value="Pyruvate_dh_E1"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="SUPFAM" id="SSF52518">
    <property type="entry name" value="Thiamin diphosphate-binding fold (THDP-binding)"/>
    <property type="match status" value="2"/>
  </dbReference>
  <dbReference type="SUPFAM" id="SSF52922">
    <property type="entry name" value="TK C-terminal domain-like"/>
    <property type="match status" value="1"/>
  </dbReference>
  <proteinExistence type="inferred from homology"/>
  <keyword id="KW-0560">Oxidoreductase</keyword>
  <keyword id="KW-0670">Pyruvate</keyword>
  <keyword id="KW-1185">Reference proteome</keyword>
  <keyword id="KW-0786">Thiamine pyrophosphate</keyword>
  <feature type="chain" id="PRO_0000162241" description="Pyruvate dehydrogenase E1 component">
    <location>
      <begin position="1"/>
      <end position="888"/>
    </location>
  </feature>
  <evidence type="ECO:0000250" key="1"/>
  <sequence length="888" mass="101458" checksum="E127C03FB1261177" modified="2002-10-01" version="1">MSEKLYNYDVDPVETNDWVQSIESVIREEGLERAKFLIEKILKKSKITRANFFKCFFTSDYINTISSEEEVEYPGDLILEKRIRSAIRWNAIMMVLRASKKDLELGGHLSSFQSSATIYEVCFNHFFRSKNDEDGGDLVYFQGHIAPGIYARSFLEGRLSKKQIDNFRQEVDGKGLSSYPHPKLMPNFWQFPTVSMGLGPLCAIYQAKFLKYLQNRELKNTSKQTVYAFLGDGEMDEPESKGAISIAVREKLDNLIFVINCNLQRLDGPVVGNGKIVNELESFFYGAGWKVIKVIWGGKWDSLLKKDKTGKLIQLMNETIDGEYQTLKSKDGAYVRKYFFGKYQETLELVKNMTDEEIWNLNRGGHDPKKMFNALKKAKEIKDKPTVILAHTVKGYGMGVIAEGKNIAHQIKKININGIIYIRDRFNIPISNEDIKELPYVVFEKNSKEYCYMHQQRKKLGGYIPFRLSKFTNALNIPDLIDFKSLLKEQNKKMSTTIAFVRVLNLILKNHSIKNLIVPIIADEARTFGMEGLFRMIGIYSSIGQKYVPQDREQLAYYKEEKKGQILQEGINELGAASSWLAAATSYSTNDFPMIPFYIYYSIFGFQRIGDLFWAAGDQQARGFLIGGTSGRTTLNGEGLQHEDGHSHIQSLTIPNCVSYDPAFAYEVAVIIQDGLRRMYGPLQENIYYYITTINENYYMPAMPQGVEKGICKGIYKLKTFYATELKVQLMGSGAILRCICKAGEILSNDYCITTDIYSVTSFTELARNGEDCERWNMLHPYEKKRIAYIKTVMNSSPAVAATDYMKLFAEQIRHYIPSNEYHVLGTDGFGRSDSRDKLRDHFEVSAYYIVVAALNLLAKLNNINKKVVEEAIIKFNINADKINPRLA</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>