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<entry dataset="Swiss-Prot" created="2008-01-15" modified="2026-09-02" version="101" xmlns="http://uniprot.org/uniprot">
  <accession>Q0T9D1</accession>
  <name>AMPA_ECOL5</name>
  <protein>
    <recommendedName>
      <fullName evidence="1">Probable cytosol aminopeptidase</fullName>
      <ecNumber evidence="1">3.4.11.1</ecNumber>
    </recommendedName>
    <alternativeName>
      <fullName evidence="1">Leucine aminopeptidase</fullName>
      <shortName evidence="1">LAP</shortName>
      <ecNumber evidence="1">3.4.11.10</ecNumber>
    </alternativeName>
    <alternativeName>
      <fullName evidence="1">Leucyl aminopeptidase</fullName>
    </alternativeName>
  </protein>
  <gene>
    <name evidence="1" type="primary">pepA</name>
    <name type="ordered locus">ECP_4509</name>
  </gene>
  <organism>
    <name type="scientific">Escherichia coli O6:K15:H31 (strain 536 / UPEC)</name>
    <dbReference type="NCBI Taxonomy" id="362663"/>
    <lineage>
      <taxon>Bacteria</taxon>
      <taxon>Pseudomonadati</taxon>
      <taxon>Pseudomonadota</taxon>
      <taxon>Gammaproteobacteria</taxon>
      <taxon>Enterobacterales</taxon>
      <taxon>Enterobacteriaceae</taxon>
      <taxon>Escherichia</taxon>
    </lineage>
  </organism>
  <reference key="1">
    <citation type="journal article" date="2006" name="Mol. Microbiol." volume="61" first="584" last="595">
      <title>Role of pathogenicity island-associated integrases in the genome plasticity of uropathogenic Escherichia coli strain 536.</title>
      <authorList>
        <person name="Hochhut B."/>
        <person name="Wilde C."/>
        <person name="Balling G."/>
        <person name="Middendorf B."/>
        <person name="Dobrindt U."/>
        <person name="Brzuszkiewicz E."/>
        <person name="Gottschalk G."/>
        <person name="Carniel E."/>
        <person name="Hacker J."/>
      </authorList>
      <dbReference type="PubMed" id="16879640"/>
      <dbReference type="DOI" id="10.1111/j.1365-2958.2006.05255.x"/>
    </citation>
    <scope>NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]</scope>
    <source>
      <strain>536 / UPEC</strain>
    </source>
  </reference>
  <comment type="function">
    <text evidence="1">Presumably involved in the processing and regular turnover of intracellular proteins. Catalyzes the removal of unsubstituted N-terminal amino acids from various peptides.</text>
  </comment>
  <comment type="catalytic activity">
    <reaction evidence="1">
      <text>Release of an N-terminal amino acid, Xaa-|-Yaa-, in which Xaa is preferably Leu, but may be other amino acids including Pro although not Arg or Lys, and Yaa may be Pro. Amino acid amides and methyl esters are also readily hydrolyzed, but rates on arylamides are exceedingly low.</text>
      <dbReference type="EC" id="3.4.11.1"/>
    </reaction>
  </comment>
  <comment type="catalytic activity">
    <reaction evidence="1">
      <text>Release of an N-terminal amino acid, preferentially leucine, but not glutamic or aspartic acids.</text>
      <dbReference type="EC" id="3.4.11.10"/>
    </reaction>
  </comment>
  <comment type="cofactor">
    <cofactor evidence="1">
      <name>Mn(2+)</name>
      <dbReference type="ChEBI" id="CHEBI:29035"/>
    </cofactor>
    <text evidence="1">Binds 2 manganese ions per subunit.</text>
  </comment>
  <comment type="subcellular location">
    <subcellularLocation>
      <location evidence="1">Cytoplasm</location>
    </subcellularLocation>
  </comment>
  <comment type="similarity">
    <text evidence="1">Belongs to the peptidase M17 family.</text>
  </comment>
  <dbReference type="EC" id="3.4.11.1" evidence="1"/>
  <dbReference type="EC" id="3.4.11.10" evidence="1"/>
  <dbReference type="EMBL" id="CP000247">
    <property type="protein sequence ID" value="ABG72448.1"/>
    <property type="molecule type" value="Genomic_DNA"/>
  </dbReference>
  <dbReference type="RefSeq" id="WP_000397144.1">
    <property type="nucleotide sequence ID" value="NC_008253.1"/>
  </dbReference>
  <dbReference type="AlphaFoldDB" id="Q0T9D1"/>
  <dbReference type="SMR" id="Q0T9D1"/>
  <dbReference type="MEROPS" id="M17.003"/>
  <dbReference type="GeneID" id="67175285"/>
  <dbReference type="GeneID" id="93777558"/>
  <dbReference type="KEGG" id="ecp:ECP_4509"/>
  <dbReference type="HOGENOM" id="CLU_013734_2_2_6"/>
  <dbReference type="GO" id="GO:0005737">
    <property type="term" value="C:cytoplasm"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="UniProtKB-SubCell"/>
  </dbReference>
  <dbReference type="GO" id="GO:0003677">
    <property type="term" value="F:DNA binding"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="UniProtKB-ARBA"/>
  </dbReference>
  <dbReference type="GO" id="GO:0030145">
    <property type="term" value="F:manganese ion binding"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="UniProtKB-UniRule"/>
  </dbReference>
  <dbReference type="GO" id="GO:0070006">
    <property type="term" value="F:metalloaminopeptidase activity"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="InterPro"/>
  </dbReference>
  <dbReference type="GO" id="GO:0006310">
    <property type="term" value="P:DNA recombination"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="UniProtKB-ARBA"/>
  </dbReference>
  <dbReference type="GO" id="GO:0045892">
    <property type="term" value="P:negative regulation of DNA-templated transcription"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="UniProtKB-ARBA"/>
  </dbReference>
  <dbReference type="GO" id="GO:0006508">
    <property type="term" value="P:proteolysis"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="InterPro"/>
  </dbReference>
  <dbReference type="CDD" id="cd00433">
    <property type="entry name" value="Peptidase_M17"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="FunFam" id="3.40.220.10:FF:000001">
    <property type="entry name" value="Probable cytosol aminopeptidase"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="FunFam" id="3.40.630.10:FF:000004">
    <property type="entry name" value="Probable cytosol aminopeptidase"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="Gene3D" id="3.40.220.10">
    <property type="entry name" value="Leucine Aminopeptidase, subunit E, domain 1"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="Gene3D" id="3.40.630.10">
    <property type="entry name" value="Zn peptidases"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="HAMAP" id="MF_00181">
    <property type="entry name" value="Cytosol_peptidase_M17"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR011356">
    <property type="entry name" value="Leucine_aapep/pepB"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR043472">
    <property type="entry name" value="Macro_dom-like"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR000819">
    <property type="entry name" value="Peptidase_M17_C"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR023042">
    <property type="entry name" value="Peptidase_M17_leu_NH2_pept"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR008283">
    <property type="entry name" value="Peptidase_M17_N"/>
  </dbReference>
  <dbReference type="NCBIfam" id="NF002072">
    <property type="entry name" value="PRK00913.1-1"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="NCBIfam" id="NF002073">
    <property type="entry name" value="PRK00913.1-2"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="NCBIfam" id="NF002074">
    <property type="entry name" value="PRK00913.1-4"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="PANTHER" id="PTHR11963:SF23">
    <property type="entry name" value="CYTOSOL AMINOPEPTIDASE"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="PANTHER" id="PTHR11963">
    <property type="entry name" value="LEUCINE AMINOPEPTIDASE-RELATED"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="Pfam" id="PF00883">
    <property type="entry name" value="Peptidase_M17"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="Pfam" id="PF02789">
    <property type="entry name" value="Peptidase_M17_N"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="PRINTS" id="PR00481">
    <property type="entry name" value="LAMNOPPTDASE"/>
  </dbReference>
  <dbReference type="SUPFAM" id="SSF52949">
    <property type="entry name" value="Macro domain-like"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="SUPFAM" id="SSF53187">
    <property type="entry name" value="Zn-dependent exopeptidases"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="PROSITE" id="PS00631">
    <property type="entry name" value="CYTOSOL_AP"/>
    <property type="match status" value="1"/>
  </dbReference>
  <proteinExistence type="inferred from homology"/>
  <keyword id="KW-0031">Aminopeptidase</keyword>
  <keyword id="KW-0963">Cytoplasm</keyword>
  <keyword id="KW-0378">Hydrolase</keyword>
  <keyword id="KW-0464">Manganese</keyword>
  <keyword id="KW-0479">Metal-binding</keyword>
  <keyword id="KW-0645">Protease</keyword>
  <feature type="chain" id="PRO_1000019915" description="Probable cytosol aminopeptidase">
    <location>
      <begin position="1"/>
      <end position="503"/>
    </location>
  </feature>
  <feature type="active site" evidence="1">
    <location>
      <position position="282"/>
    </location>
  </feature>
  <feature type="active site" evidence="1">
    <location>
      <position position="356"/>
    </location>
  </feature>
  <feature type="binding site" evidence="1">
    <location>
      <position position="270"/>
    </location>
    <ligand>
      <name>Mn(2+)</name>
      <dbReference type="ChEBI" id="CHEBI:29035"/>
      <label>2</label>
    </ligand>
  </feature>
  <feature type="binding site" evidence="1">
    <location>
      <position position="275"/>
    </location>
    <ligand>
      <name>Mn(2+)</name>
      <dbReference type="ChEBI" id="CHEBI:29035"/>
      <label>1</label>
    </ligand>
  </feature>
  <feature type="binding site" evidence="1">
    <location>
      <position position="275"/>
    </location>
    <ligand>
      <name>Mn(2+)</name>
      <dbReference type="ChEBI" id="CHEBI:29035"/>
      <label>2</label>
    </ligand>
  </feature>
  <feature type="binding site" evidence="1">
    <location>
      <position position="293"/>
    </location>
    <ligand>
      <name>Mn(2+)</name>
      <dbReference type="ChEBI" id="CHEBI:29035"/>
      <label>2</label>
    </ligand>
  </feature>
  <feature type="binding site" evidence="1">
    <location>
      <position position="352"/>
    </location>
    <ligand>
      <name>Mn(2+)</name>
      <dbReference type="ChEBI" id="CHEBI:29035"/>
      <label>1</label>
    </ligand>
  </feature>
  <feature type="binding site" evidence="1">
    <location>
      <position position="354"/>
    </location>
    <ligand>
      <name>Mn(2+)</name>
      <dbReference type="ChEBI" id="CHEBI:29035"/>
      <label>1</label>
    </ligand>
  </feature>
  <feature type="binding site" evidence="1">
    <location>
      <position position="354"/>
    </location>
    <ligand>
      <name>Mn(2+)</name>
      <dbReference type="ChEBI" id="CHEBI:29035"/>
      <label>2</label>
    </ligand>
  </feature>
  <evidence type="ECO:0000255" key="1">
    <source>
      <dbReference type="HAMAP-Rule" id="MF_00181"/>
    </source>
  </evidence>
  <sequence length="503" mass="54880" checksum="643DED17EAC44DCD" modified="2006-09-05" version="1">MEFSVKSGSPEKQRSACIVVGVFEPRRLSPIAEQLDKISDGYISALLRRGELEGKPGQTLLLHHVPNVLSERILLIGCGKERELDERQYKQVIQKTINTLNDTGSMEAVCFLTELHVKGRNNYWKVRQAVETAKETLYSFDQLKTNKSEPRRPLRKMVFNVPTRRELTSGERAIQHGLAIAAGIKAAKDLGNMPPNICNAAYLASQARQLADSYSKNVITRVIGEQQMKELGMHSYLAVGQGSQNESLMSVIEYKGNASEDARPIVLVGKGLTFDSGGISIKPSEGMDEMKYDMCGAAAVYGVMRMVAELQLPINVIGVLAGCENMPGGRAYRPGDVLTTMSGQTVEVLNTDAEGRLVLCDVLTYVERFEPEAVIDVATLTGACVIALGHHITGLMANHNPLAHELIAASEQSGDRAWRLPLGDEYQEQLESNFADMANIGGRPGGAITAGCFLSRFTRKYNWAHLDIAGTAWRSGKAKGATGRPVALLAQFLLNRAGFNGEE</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>