ID   ATPF_HETA2              Reviewed;         182 AA.
AC   B2XT88;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   01-JUL-2008, sequence version 1.
DT   03-AUG-2022, entry version 42.
DE   RecName: Full=ATP synthase subunit b, chloroplastic {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};
GN   Name=atpF {ECO:0000255|HAMAP-Rule:MF_01398};
GN   OrderedLocusNames=Heak293_Cp079;
OS   Heterosigma akashiwo (strain NIES-293 / 8280G21-1).
OG   Plastid; Chloroplast.
OC   Eukaryota; Sar; Stramenopiles; Ochrophyta; Raphidophyceae; Chattonellales;
OC   Chattonellaceae; Heterosigma.
OX   NCBI_TaxID=536047;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX   PubMed=18462506; DOI=10.1186/1471-2164-9-211;
RA   Cattolico R.A., Jacobs M.A., Zhou Y., Chang J., Duplessis M., Lybrand T.,
RA   McKay J., Ong H.C., Sims E., Rocap G.;
RT   "Chloroplast genome sequencing analysis of Heterosigma akashiwo CCMP452
RT   (West Atlantic) and NIES293 (West Pacific) strains.";
RL   BMC Genomics 9:211-211(2008).
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 four main
CC       subunits: a(1), b(1), b'(1) and c(10-14). The alpha and beta chains
CC       form an alternating ring which encloses part of the gamma chain. F(1)
CC       is 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, b and b'
CC       chains. {ECO:0000255|HAMAP-Rule:MF_01398}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000255|HAMAP-Rule:MF_01398}; Single-pass membrane protein
CC       {ECO:0000255|HAMAP-Rule:MF_01398}.
CC   -!- MISCELLANEOUS: In plastids the F-type ATPase is also known as
CC       CF(1)CF(0).
CC   -!- SIMILARITY: Belongs to the ATPase B chain family. {ECO:0000255|HAMAP-
CC       Rule:MF_01398}.
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DR   EMBL; EU168190; ABV65986.1; -; Genomic_DNA.
DR   RefSeq; YP_001936380.1; NC_010772.1.
DR   AlphaFoldDB; B2XT88; -.
DR   SMR; B2XT88; -.
DR   GeneID; 6335650; -.
DR   GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
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; IPR002146; ATP_synth_b/b'su_bac/chlpt.
DR   Pfam; PF00430; ATP-synt_B; 1.
PE   3: Inferred from homology;
KW   ATP synthesis; CF(0); Chloroplast; Hydrogen ion transport; Ion transport;
KW   Membrane; Plastid; Thylakoid; Transmembrane; Transmembrane helix;
KW   Transport.
FT   CHAIN           1..182
FT                   /note="ATP synthase subunit b, chloroplastic"
FT                   /id="PRO_0000368992"
FT   TRANSMEM        29..47
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01398"
SQ   SEQUENCE   182 AA;  21003 MW;  F85101523B91544C CRC64;
     MENLTNIFLF LSNENEGIQL NTDIFEANII NLALLIVLVI NVAKDVLGSI LSARKASILD
     KIEEADKKLN EADKRFTEAR LQWSQANIFG EDLEKKTYQR INAFHESQNL KNKDALLREY
     FSTLVVLDLK NEQVQKQVRN YVMELALIEV YGVFTKLVAN KKFQENYSNY SVLLLEKLIG
     EK