ID   ATPF2_EMIHU             Reviewed;         162 AA.
AC   Q4G3A0;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   30-AUG-2005, sequence version 1.
DT   03-AUG-2022, entry version 62.
DE   RecName: Full=ATP synthase subunit b', chloroplastic {ECO:0000255|HAMAP-Rule:MF_01399};
DE   AltName: Full=ATP synthase F(0) sector subunit b' {ECO:0000255|HAMAP-Rule:MF_01399};
DE   AltName: Full=ATPase subunit II {ECO:0000255|HAMAP-Rule:MF_01399};
GN   Name=atpF2 {ECO:0000255|HAMAP-Rule:MF_01399};
GN   Synonyms=atpG {ECO:0000255|HAMAP-Rule:MF_01399};
OS   Emiliania huxleyi (Coccolithophore) (Pontosphaera huxleyi).
OG   Plastid; Chloroplast.
OC   Eukaryota; Haptista; Haptophyta; Prymnesiophyceae; Isochrysidales;
OC   Noelaerhabdaceae; Emiliania.
OX   NCBI_TaxID=2903;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CCMP373 / CSIRO-CS-57 / BT6;
RX   PubMed=16303746; DOI=10.1093/dnares/12.2.151;
RA   Sanchez-Puerta M.V., Bachvaroff T.R., Delwiche C.F.;
RT   "The complete plastid genome sequence of the haptophyte Emiliania huxleyi:
RT   a comparison to other plastid genomes.";
RL   DNA Res. 12:151-156(2005).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=CCMP373 / CSIRO-CS-57 / BT6;
RX   PubMed=16408243; DOI=10.1007/s00239-004-0365-4;
RA   Bachvaroff T.R., Sanchez-Puerta M.V., Delwiche C.F.;
RT   "Rate variation as a function of gene origin in plastid-derived genes of
RT   peridinin-containing dinoflagellates.";
RL   J. Mol. Evol. 62:42-52(2006).
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_01399}.
CC   -!- FUNCTION: Component of the F(0) channel, it forms part of the
CC       peripheral stalk, linking F(1) to F(0). The b'-subunit is a diverged
CC       and duplicated form of b found in plants and photosynthetic bacteria.
CC       {ECO:0000255|HAMAP-Rule:MF_01399}.
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_01399}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000255|HAMAP-Rule:MF_01399}; Single-pass membrane protein
CC       {ECO:0000255|HAMAP-Rule:MF_01399}.
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_01399}.
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DR   EMBL; AY704577; AAU81916.1; -; Genomic_DNA.
DR   EMBL; AY741371; AAX13866.1; -; Genomic_DNA.
DR   RefSeq; YP_277367.1; NC_007288.1.
DR   AlphaFoldDB; Q4G3A0; -.
DR   SMR; Q4G3A0; -.
DR   GeneID; 3562443; -.
DR   Proteomes; UP000013827; Unassembled WGS sequence.
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   HAMAP; MF_01399; ATP_synth_bprime; 1.
DR   InterPro; IPR034679; ATP_synth_b.
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   3: Inferred from homology;
KW   ATP synthesis; CF(0); Chloroplast; Hydrogen ion transport; Ion transport;
KW   Membrane; Plastid; Reference proteome; Thylakoid; Transmembrane;
KW   Transmembrane helix; Transport.
FT   CHAIN           1..162
FT                   /note="ATP synthase subunit b', chloroplastic"
FT                   /id="PRO_0000369060"
FT   TRANSMEM        26..46
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01399"
SQ   SEQUENCE   162 AA;  17777 MW;  79B189E0EC9AA9DF CRC64;
     MNNLIMLVTN AVTLSEAAGG LFDFNATLPL QALQFILLTV LLTFIFYKPI GKLLEERETF
     ISNNLAEASA KLLKADELCE QYETQLKEAK TGAQDVIAKA ESEAKGIVAQ EITQARADAA
     SLIAQTNKEL EAQKKLALQQ LETQIDELSQ LIKEKLLGKV VL