ID   ATP6_STRSV              Reviewed;         238 AA.
AC   A3CM09;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   20-MAR-2007, sequence version 1.
DT   25-MAY-2022, entry version 90.
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=SSA_0783;
OS   Streptococcus sanguinis (strain SK36).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae;
OC   Streptococcus.
OX   NCBI_TaxID=388919;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=SK36;
RX   PubMed=17277061; DOI=10.1128/jb.01808-06;
RA   Xu P., Alves J.M., Kitten T., Brown A., Chen Z., Ozaki L.S., Manque P.,
RA   Ge X., Serrano M.G., Puiu D., Hendricks S., Wang Y., Chaplin M.D., Akan D.,
RA   Paik S., Peterson D.L., Macrina F.L., Buck G.A.;
RT   "Genome of the opportunistic pathogen Streptococcus sanguinis.";
RL   J. Bacteriol. 189:3166-3175(2007).
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; CP000387; ABN44214.1; -; Genomic_DNA.
DR   RefSeq; WP_002896002.1; NC_009009.1.
DR   RefSeq; YP_001034764.1; NC_009009.1.
DR   AlphaFoldDB; A3CM09; -.
DR   SMR; A3CM09; -.
DR   STRING; 388919.SSA_0783; -.
DR   EnsemblBacteria; ABN44214; ABN44214; SSA_0783.
DR   KEGG; ssa:SSA_0783; -.
DR   PATRIC; fig|388919.9.peg.749; -.
DR   eggNOG; COG0356; Bacteria.
DR   HOGENOM; CLU_041018_2_3_9; -.
DR   OMA; FTHAVRL; -.
DR   OrthoDB; 867266at2; -.
DR   Proteomes; UP000002148; 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; 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.
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..238
FT                   /note="ATP synthase subunit a"
FT                   /id="PRO_1000145339"
FT   TRANSMEM        18..38
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01393"
FT   TRANSMEM        77..97
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01393"
FT   TRANSMEM        114..134
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01393"
FT   TRANSMEM        167..187
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01393"
FT   TRANSMEM        193..213
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01393"
SQ   SEQUENCE   238 AA;  26848 MW;  56029AC1442ABE13 CRC64;
     MEESINPTIN IGPVTFDLTL LAMTLLTVFV TFGLVYWASR KMTIKPSRKQ NALEYIYDFV
     IDFTKGNVGE HYMKNYSLFL FSLFLFVAVA NNLGLMAKVQ TTNGFNLWTS PTANLAFDLG
     FSLLVTVFCH VEGIRRQGIK GYLKGFVTPG IMTPMNILEE FTNFASLALR IYGNIFAGEV
     LAGLLLTWAH QAAYWYPIAF IMNMVWTGFS IFISCIQAYV FTMLTSMYLG KKINGEVE