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<entry dataset="TrEMBL" created="2001-10-01" modified="2026-09-02" version="120" xmlns="http://uniprot.org/uniprot">
  <accession>Q98QT9</accession>
  <name>Q98QT9_MYCPU</name>
  <protein>
    <submittedName>
      <fullName evidence="12">ATP SYNTHASE A CHAIN</fullName>
      <ecNumber evidence="12">3.6.1.34</ecNumber>
    </submittedName>
  </protein>
  <gene>
    <name evidence="12" type="ordered locus">MYPU_2720</name>
  </gene>
  <organism evidence="13">
    <name type="scientific">Mycoplasmopsis pulmonis (strain UAB CTIP)</name>
    <name type="common">Mycoplasma pulmonis</name>
    <dbReference type="NCBI Taxonomy" id="272635"/>
    <lineage>
      <taxon>Bacteria</taxon>
      <taxon>Bacillati</taxon>
      <taxon>Mycoplasmatota</taxon>
      <taxon>Mycoplasmoidales</taxon>
      <taxon>Metamycoplasmataceae</taxon>
      <taxon>Mycoplasmopsis</taxon>
    </lineage>
  </organism>
  <reference evidence="12 13" key="1">
    <citation type="journal article" date="2001" name="Nucleic Acids Res." volume="29" first="2145" last="2153">
      <title>The complete genome sequence of the murine respiratory pathogen Mycoplasma pulmonis.</title>
      <authorList>
        <person name="Chambaud I."/>
        <person name="Heilig R."/>
        <person name="Ferris S."/>
        <person name="Barbe V."/>
        <person name="Samson D."/>
        <person name="Galisson F."/>
        <person name="Moszer I."/>
        <person name="Dybvig K."/>
        <person name="Wroblewski H."/>
        <person name="Viari A."/>
        <person name="Rocha E.P.C."/>
        <person name="Blanchard A."/>
      </authorList>
      <dbReference type="PubMed" id="11353084"/>
      <dbReference type="DOI" id="10.1093/nar/29.10.2145"/>
    </citation>
    <scope>NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]</scope>
    <source>
      <strain evidence="12 13">UAB CTIP</strain>
    </source>
  </reference>
  <comment type="subcellular location">
    <subcellularLocation>
      <location evidence="1">Membrane</location>
      <topology evidence="1">Multi-pass membrane protein</topology>
    </subcellularLocation>
  </comment>
  <comment type="similarity">
    <text evidence="2">Belongs to the ATPase A chain family.</text>
  </comment>
  <dbReference type="EC" id="3.6.1.34" evidence="12"/>
  <dbReference type="EMBL" id="AL445563">
    <property type="protein sequence ID" value="CAC13445.1"/>
    <property type="molecule type" value="Genomic_DNA"/>
  </dbReference>
  <dbReference type="PIR" id="H90545">
    <property type="entry name" value="H90545"/>
  </dbReference>
  <dbReference type="RefSeq" id="WP_010925076.1">
    <property type="nucleotide sequence ID" value="NC_002771.1"/>
  </dbReference>
  <dbReference type="AlphaFoldDB" id="Q98QT9"/>
  <dbReference type="STRING" id="272635.gene:17576862"/>
  <dbReference type="KEGG" id="mpu:MYPU_2720"/>
  <dbReference type="eggNOG" id="COG0356">
    <property type="taxonomic scope" value="Bacteria"/>
  </dbReference>
  <dbReference type="HOGENOM" id="CLU_041018_3_0_14"/>
  <dbReference type="BioCyc" id="MPUL272635:G1GT6-273-MONOMER"/>
  <dbReference type="Proteomes" id="UP000000528">
    <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="TreeGrafter"/>
  </dbReference>
  <dbReference type="GO" id="GO:0045259">
    <property type="term" value="C:proton-transporting ATP synthase complex"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="InterPro"/>
  </dbReference>
  <dbReference type="GO" id="GO:0046933">
    <property type="term" value="F:proton-transporting ATP synthase activity, rotational mechanism"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="TreeGrafter"/>
  </dbReference>
  <dbReference type="GO" id="GO:0042777">
    <property type="term" value="P:proton motive force-driven plasma membrane ATP synthesis"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="TreeGrafter"/>
  </dbReference>
  <dbReference type="CDD" id="cd00310">
    <property type="entry name" value="ATP-synt_Fo_a_6"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="Gene3D" id="1.20.120.220">
    <property type="entry name" value="ATP synthase, F0 complex, subunit A"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR045082">
    <property type="entry name" value="ATP_syn_F0_a_bact/chloroplast"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR000568">
    <property type="entry name" value="ATP_synth_F0_asu"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR035908">
    <property type="entry name" value="F0_ATP_A_sf"/>
  </dbReference>
  <dbReference type="NCBIfam" id="NF004487">
    <property type="entry name" value="PRK05815.3-5"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="PANTHER" id="PTHR42823">
    <property type="entry name" value="ATP SYNTHASE SUBUNIT A, CHLOROPLASTIC"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="PANTHER" id="PTHR42823:SF3">
    <property type="entry name" value="ATP SYNTHASE SUBUNIT A, CHLOROPLASTIC"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="Pfam" id="PF00119">
    <property type="entry name" value="ATP-synt_A"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="PRINTS" id="PR00123">
    <property type="entry name" value="ATPASEA"/>
  </dbReference>
  <dbReference type="SUPFAM" id="SSF81336">
    <property type="entry name" value="F1F0 ATP synthase subunit A"/>
    <property type="match status" value="1"/>
  </dbReference>
  <proteinExistence type="inferred from homology"/>
  <keyword evidence="10" id="KW-0066">ATP synthesis</keyword>
  <keyword evidence="4" id="KW-0138">CF(0)</keyword>
  <keyword evidence="6" id="KW-0375">Hydrogen ion transport</keyword>
  <keyword evidence="12" id="KW-0378">Hydrolase</keyword>
  <keyword evidence="8" id="KW-0406">Ion transport</keyword>
  <keyword evidence="9 11" id="KW-0472">Membrane</keyword>
  <keyword evidence="13" id="KW-1185">Reference proteome</keyword>
  <keyword evidence="5 11" id="KW-0812">Transmembrane</keyword>
  <keyword evidence="7 11" id="KW-1133">Transmembrane helix</keyword>
  <keyword evidence="3" id="KW-0813">Transport</keyword>
  <feature type="transmembrane region" description="Helical" evidence="11">
    <location>
      <begin position="30"/>
      <end position="51"/>
    </location>
  </feature>
  <feature type="transmembrane region" description="Helical" evidence="11">
    <location>
      <begin position="91"/>
      <end position="111"/>
    </location>
  </feature>
  <feature type="transmembrane region" description="Helical" evidence="11">
    <location>
      <begin position="117"/>
      <end position="138"/>
    </location>
  </feature>
  <feature type="transmembrane region" description="Helical" evidence="11">
    <location>
      <begin position="168"/>
      <end position="191"/>
    </location>
  </feature>
  <feature type="transmembrane region" description="Helical" evidence="11">
    <location>
      <begin position="211"/>
      <end position="235"/>
    </location>
  </feature>
  <evidence type="ECO:0000256" key="1">
    <source>
      <dbReference type="ARBA" id="ARBA00004141"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="2">
    <source>
      <dbReference type="ARBA" id="ARBA00006810"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="3">
    <source>
      <dbReference type="ARBA" id="ARBA00022448"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="4">
    <source>
      <dbReference type="ARBA" id="ARBA00022547"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="5">
    <source>
      <dbReference type="ARBA" id="ARBA00022692"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="6">
    <source>
      <dbReference type="ARBA" id="ARBA00022781"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="7">
    <source>
      <dbReference type="ARBA" id="ARBA00022989"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="8">
    <source>
      <dbReference type="ARBA" id="ARBA00023065"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="9">
    <source>
      <dbReference type="ARBA" id="ARBA00023136"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="10">
    <source>
      <dbReference type="ARBA" id="ARBA00023310"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="11">
    <source>
      <dbReference type="SAM" id="Phobius"/>
    </source>
  </evidence>
  <evidence type="ECO:0000313" key="12">
    <source>
      <dbReference type="EMBL" id="CAC13445.1"/>
    </source>
  </evidence>
  <evidence type="ECO:0000313" key="13">
    <source>
      <dbReference type="Proteomes" id="UP000000528"/>
    </source>
  </evidence>
  <sequence length="270" mass="30951" checksum="55768252E135F13E" modified="2001-10-01" version="1">MKMFLSAQSEPKNKNPSFTTSLWSWEHPQLFSLFITTLIIIIISLVVYFKVRKQNYKEVPKGVVLIAEEYVGAFQSTFDDASENKLKRSGAYFFSLITFLLIGNLISLIGLEPIVTSYSVPLTLALISWIGITVFKFANRKVKIIFDIINPLDLIGHFIPLLSLSVRIFGNIIGGSTVVFLFYTFLGYLWGQISGSQNQLLVLAPFFTPLFHLYFDLFGAIIQAYVFTLLSIVYWSSEIDEKELRKKQSKFNFSKKIFSFSQLKRKQNKI</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>