ID   ATPF_BACP3              Reviewed;         163 AA.
AC   P09221;
DT   01-JUL-1989, integrated into UniProtKB/Swiss-Prot.
DT   01-JUL-1989, sequence version 1.
DT   25-MAY-2022, entry version 96.
DE   RecName: Full=ATP synthase subunit b {ECO:0000255|HAMAP-Rule:MF_01398};
DE   AltName: Full=ATP synthase F(0) sector subunit b {ECO:0000255|HAMAP-Rule:MF_01398};
DE   AltName: Full=ATPase subunit I {ECO:0000255|HAMAP-Rule:MF_01398};
DE   AltName: Full=F-type ATPase subunit b {ECO:0000255|HAMAP-Rule:MF_01398};
DE            Short=F-ATPase subunit b {ECO:0000255|HAMAP-Rule:MF_01398};
DE   Flags: Precursor;
GN   Name=atpF {ECO:0000255|HAMAP-Rule:MF_01398};
OS   Bacillus sp. (strain PS3).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Bacillus.
OX   NCBI_TaxID=2334;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], PROTEIN SEQUENCE OF 12-50; 80-94 AND
RP   132-147, AND SUBUNIT.
RX   PubMed=2894854; DOI=10.1016/0005-2728(88)90064-3;
RA   Ohta S., Yohda M., Ishizuka M., Hirata H., Hamamoto T.,
RA   Otawara-Hamamoto Y., Matsuda K., Kagawa Y.;
RT   "Sequence and over-expression of subunits of adenosine triphosphate
RT   synthase in thermophilic bacterium PS3.";
RL   Biochim. Biophys. Acta 933:141-155(1988).
CC   -!- FUNCTION: F(1)F(0) ATP synthase produces ATP from ADP in the presence
CC       of a proton or sodium gradient. F-type ATPases consist of two
CC       structural domains, F(1) containing the extramembraneous catalytic core
CC       and F(0) containing the membrane proton channel, linked together by a
CC       central stalk and a peripheral stalk. During catalysis, ATP synthesis
CC       in the catalytic domain of F(1) is coupled via a rotary mechanism of
CC       the central stalk subunits to proton translocation. {ECO:0000255|HAMAP-
CC       Rule:MF_01398}.
CC   -!- FUNCTION: Component of the F(0) channel, it forms part of the
CC       peripheral stalk, linking F(1) to F(0). {ECO:0000255|HAMAP-
CC       Rule:MF_01398}.
CC   -!- SUBUNIT: F-type ATPases have 2 components, F(1) - the catalytic core
CC       - and F(0) - the membrane proton channel. F(1) has five subunits:
CC       alpha(3), beta(3), gamma(1), delta(1), epsilon(1). F(0) has three main
CC       subunits: a(1), b(2) and c(10-14). The alpha and beta chains form an
CC       alternating ring which encloses part of the gamma chain. F(1) is
CC       attached to F(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_01398}.
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000255|HAMAP-Rule:MF_01398};
CC       Single-pass membrane protein {ECO:0000255|HAMAP-Rule:MF_01398}.
CC   -!- SIMILARITY: Belongs to the ATPase B chain family. {ECO:0000255|HAMAP-
CC       Rule:MF_01398}.
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DR   EMBL; X07804; CAA30650.1; -; Genomic_DNA.
DR   AlphaFoldDB; P09221; -.
DR   SMR; P09221; -.
DR   TCDB; 3.A.2.1.14; the h(+)- or na(+)-translocating f-type, v-type and a-type atpase (f-atpase) superfamily.
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   HAMAP; MF_01398; ATP_synth_b_bprime; 1.
DR   InterPro; IPR028987; ATP_synth_B-like_membr_sf.
DR   InterPro; IPR002146; ATP_synth_b/b'su_bac/chlpt.
DR   InterPro; IPR005864; ATP_synth_F0_bsu_bac.
DR   Pfam; PF00430; ATP-synt_B; 1.
DR   SUPFAM; SSF81573; SSF81573; 1.
DR   TIGRFAMs; TIGR01144; ATP_synt_b; 1.
PE   1: Evidence at protein level;
KW   ATP synthesis; Cell membrane; CF(0); Direct protein sequencing;
KW   Hydrogen ion transport; Ion transport; Membrane; Transmembrane;
KW   Transmembrane helix; Transport.
FT   PROPEP          1..11
FT                   /evidence="ECO:0000269|PubMed:2894854"
FT                   /id="PRO_0000002628"
FT   CHAIN           12..163
FT                   /note="ATP synthase subunit b"
FT                   /id="PRO_0000002629"
FT   TRANSMEM        16..36
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01398"
SQ   SEQUENCE   163 AA;  18566 MW;  B8E790CA0EF18ACF CRC64;
     MLWKANVWVL GEAAHGISGG TIIYQLLMFI ILLALLRKFA WQPLMNIMKQ REEHIATKST
     RRKNDRQEAE KLLEEQRELM KQSRQEAQAL IENAASLAEE QKEQIVASAR AEAERVKEAA
     KKEIEREKEQ AMAALREQVA SLSVLIASKV IEKELTEQDQ AAS