ID   ATPZ_PROMO              Reviewed;         127 AA.
AC   P29705;
DT   01-APR-1993, integrated into UniProtKB/Swiss-Prot.
DT   01-APR-1993, sequence version 1.
DT   25-MAY-2022, entry version 69.
DE   RecName: Full=ATP synthase protein I, sodium ion specific;
GN   Name=atpI; Synonyms=uncI;
OS   Propionigenium modestum.
OC   Bacteria; Fusobacteria; Fusobacteriales; Fusobacteriaceae; Propionigenium.
OX   NCBI_TaxID=2333;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=DSM 2376 / Gra Succ2;
RX   PubMed=1386022; DOI=10.1111/j.1432-1033.1992.tb17072.x;
RA   Kaim G.W., Ludwig W., Dimroth P., Schleifer K.H.;
RT   "Cloning, sequencing and in vivo expression of genes encoding the F0 part
RT   of the sodium-ion-dependent ATP synthase of Propionigenium modestum in
RT   Escherichia coli.";
RL   Eur. J. Biochem. 207:463-470(1992).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=DSM 2376 / Gra Succ2;
RX   PubMed=2170948; DOI=10.1093/nar/18.19.5887;
RA   Esser U., Krumholz L.R., Simoni R.D.;
RT   "Nucleotide sequence of the F0 subunits of the sodium dependent F1F0 ATPase
RT   of Propionigenium modestum.";
RL   Nucleic Acids Res. 18:5887-5888(1990).
RN   [3]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=DSM 2376 / Gra Succ2;
RX   PubMed=1533602; DOI=10.1016/0378-1097(92)90559-7;
RA   Krumholz L.R., Esser U., Simoni R.D.;
RT   "Characterization of the genes coding for the F1F0 subunits of the sodium
RT   dependent ATPase of Propionigenium modestum.";
RL   FEMS Microbiol. Lett. 70:37-41(1992).
CC   -!- FUNCTION: A possible function for this protein is to guide the assembly
CC       of the membrane sector of the ATPase enzyme complex.
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000305}; Multi-pass membrane
CC       protein {ECO:0000305}.
CC   -!- MISCELLANEOUS: The ATPase of P.modestum is of special interest because
CC       it uses sodium ions instead of protons as the physiological coupling
CC       ion.
CC   -!- SIMILARITY: Belongs to the bacterial AtpI family. {ECO:0000305}.
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DR   EMBL; X66102; CAA46893.1; -; Genomic_DNA.
DR   EMBL; X58461; CAA41367.1; -; Genomic_DNA.
DR   PIR; S24366; S24366.
DR   AlphaFoldDB; P29705; -.
DR   TCDB; 1.A.77.3.29; the mg(2+)/ca(2+) uniporter (mcu) family.
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:0006814; P:sodium ion transport; IEA:UniProtKB-KW.
DR   InterPro; IPR005598; ATP_synth_I.
DR   Pfam; PF03899; ATP-synt_I; 1.
PE   3: Inferred from homology;
KW   Cell membrane; CF(0); Hydrogen ion transport; Ion transport; Membrane;
KW   Sodium; Sodium transport; Transmembrane; Transmembrane helix; Transport.
FT   CHAIN           1..127
FT                   /note="ATP synthase protein I, sodium ion specific"
FT                   /id="PRO_0000071709"
FT   TRANSMEM        5..25
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        30..50
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        81..101
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   127 AA;  14338 MW;  9633BEE03590F910 CRC64;
     MNQEIKKILK NSLITSLIVL VYGIVVRNPI VYFGMFVGCL ISTFCFYMIC QEAESAMKSG
     SPFKMTVTGY MKRYAIYGIY LGILVKFFGF PVFLGGAVGL LNIKFNIFLK VVSTQFEKIK
     KKLSSLK