ID   ATP6_BUCAI              Reviewed;         274 AA.
AC   P57118;
DT   01-DEC-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-DEC-2000, sequence version 1.
DT   25-MAY-2022, entry version 126.
DE   RecName: Full=ATP synthase subunit a {ECO:0000255|HAMAP-Rule:MF_01393};
DE   AltName: Full=ATP synthase F0 sector subunit a {ECO:0000255|HAMAP-Rule:MF_01393};
DE   AltName: Full=F-ATPase subunit 6 {ECO:0000255|HAMAP-Rule:MF_01393};
GN   Name=atpB {ECO:0000255|HAMAP-Rule:MF_01393}; OrderedLocusNames=BU002;
OS   Buchnera aphidicola subsp. Acyrthosiphon pisum (strain APS) (Acyrthosiphon
OS   pisum symbiotic bacterium).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Erwiniaceae; Buchnera.
OX   NCBI_TaxID=107806;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=APS;
RX   PubMed=10993077; DOI=10.1038/35024074;
RA   Shigenobu S., Watanabe H., Hattori M., Sakaki Y., Ishikawa H.;
RT   "Genome sequence of the endocellular bacterial symbiont of aphids Buchnera
RT   sp. APS.";
RL   Nature 407:81-86(2000).
CC   -!- FUNCTION: Key component of the proton channel; it plays a direct role
CC       in the translocation of protons across the membrane.
CC       {ECO:0000255|HAMAP-Rule:MF_01393}.
CC   -!- SUBUNIT: F-type ATPases have 2 components, CF(1) - the catalytic core
CC       - and CF(0) - the membrane proton channel. CF(1) has five subunits:
CC       alpha(3), beta(3), gamma(1), delta(1), epsilon(1). CF(0) has three main
CC       subunits: a(1), b(2) and c(9-12). The alpha and beta chains form an
CC       alternating ring which encloses part of the gamma chain. CF(1) is
CC       attached to CF(0) by a central stalk formed by the gamma and epsilon
CC       chains, while a peripheral stalk is formed by the delta and b chains.
CC       {ECO:0000255|HAMAP-Rule:MF_01393}.
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000255|HAMAP-Rule:MF_01393};
CC       Multi-pass membrane protein {ECO:0000255|HAMAP-Rule:MF_01393}.
CC   -!- SIMILARITY: Belongs to the ATPase A chain family. {ECO:0000255|HAMAP-
CC       Rule:MF_01393}.
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DR   EMBL; BA000003; BAB12730.1; -; Genomic_DNA.
DR   RefSeq; NP_239844.1; NC_002528.1.
DR   RefSeq; WP_010895897.1; NC_002528.1.
DR   AlphaFoldDB; P57118; -.
DR   SMR; P57118; -.
DR   STRING; 107806.10038695; -.
DR   EnsemblBacteria; BAB12730; BAB12730; BAB12730.
DR   KEGG; buc:BU002; -.
DR   PATRIC; fig|107806.10.peg.15; -.
DR   eggNOG; COG0356; Bacteria.
DR   HOGENOM; CLU_041018_1_0_6; -.
DR   OMA; FTHAVRL; -.
DR   Proteomes; UP000001806; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0045263; C:proton-transporting ATP synthase complex, coupling factor F(o); IEA:UniProtKB-KW.
DR   GO; GO:0046933; F:proton-transporting ATP synthase activity, rotational mechanism; IEA:UniProtKB-UniRule.
DR   Gene3D; 1.20.120.220; -; 1.
DR   HAMAP; MF_01393; ATP_synth_a_bact; 1.
DR   InterPro; IPR045082; ATP_syn_F0_a_bact/chloroplast.
DR   InterPro; IPR000568; ATP_synth_F0_asu.
DR   InterPro; IPR023011; ATP_synth_F0_asu_AS.
DR   InterPro; IPR035908; F0_ATP_A_sf.
DR   PANTHER; PTHR42823; PTHR42823; 1.
DR   Pfam; PF00119; ATP-synt_A; 1.
DR   PRINTS; PR00123; ATPASEA.
DR   SUPFAM; SSF81336; SSF81336; 1.
DR   TIGRFAMs; TIGR01131; ATP_synt_6_or_A; 1.
DR   PROSITE; PS00449; ATPASE_A; 1.
PE   3: Inferred from homology;
KW   ATP synthesis; Cell membrane; CF(0); Hydrogen ion transport; Ion transport;
KW   Membrane; Reference proteome; Transmembrane; Transmembrane helix;
KW   Transport.
FT   CHAIN           1..274
FT                   /note="ATP synthase subunit a"
FT                   /id="PRO_0000082049"
FT   TRANSMEM        44..64
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01393"
FT   TRANSMEM        110..130
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01393"
FT   TRANSMEM        142..164
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01393"
FT   TRANSMEM        212..232
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01393"
FT   TRANSMEM        243..263
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01393"
SQ   SEQUENCE   274 AA;  31364 MW;  4B2321336EFE78A4 CRC64;
     MILEKISDPQ KYISHHLSHL QIDLRSFKII QPGALSSDYW TVNVDSMFFS LVLGSFFLSI
     FYMVGKKITQ GIPGKLQTAI ELIFEFVNLN VKSMYQGKNA LIAPLSLTVF IWVFLMNLMD
     LVPIDFFPFI SEKVFELPAM RIVPSADINI TLSMSLGVFF LILFYTVKIK GYVGFLKELI
     LQPFNHPVFS IFNFILEFVS LVSKPISLGL RLFGNMYAGE MIFILIAGLL PWWTQCFLNV
     PWAIFHILII SLQAFIFMVL TIVYLSMASQ SHKD