ID   KDPA_GEOSE              Reviewed;         115 AA.
AC   P94456;
DT   30-MAY-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-MAY-1997, sequence version 1.
DT   25-MAY-2022, entry version 85.
DE   RecName: Full=Potassium-transporting ATPase potassium-binding subunit {ECO:0000250|UniProtKB:P03959};
DE   AltName: Full=ATP phosphohydrolase [potassium-transporting] A chain {ECO:0000250|UniProtKB:P03959};
DE   AltName: Full=Potassium-binding and translocating subunit A {ECO:0000250|UniProtKB:P03959};
DE   AltName: Full=Potassium-translocating ATPase A chain {ECO:0000250|UniProtKB:P03959};
DE   Flags: Fragment;
GN   Name=kdpA {ECO:0000250|UniProtKB:P03959};
OS   Geobacillus stearothermophilus (Bacillus stearothermophilus).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Geobacillus.
OX   NCBI_TaxID=1422;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=NCIMB 8224 / CCM 2186 / NCA C-1235.1 / VKM B-718;
RX   PubMed=9023955; DOI=10.1128/aem.63.2.763-766.1997;
RA   Batisse N., Weigel P., Lecocq M., Sakanyan V.;
RT   "Two amino acid amidohydrolase genes encoding L-stereospecific carbamoylase
RT   and aminoacylase are organized in a common operon in Bacillus
RT   stearothermophilus.";
RL   Appl. Environ. Microbiol. 63:763-766(1997).
CC   -!- FUNCTION: Part of the high-affinity ATP-driven potassium transport (or
CC       Kdp) system, which catalyzes the hydrolysis of ATP coupled with the
CC       electrogenic transport of potassium into the cytoplasm. This subunit
CC       binds the extracellular potassium ions and delivers the ions to the
CC       membrane domain of KdpB through an intramembrane tunnel.
CC       {ECO:0000250|UniProtKB:P03959}.
CC   -!- SUBUNIT: The system is composed of three essential subunits: KdpA, KdpB
CC       and KdpC. {ECO:0000250|UniProtKB:P03959}.
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000250|UniProtKB:P03959};
CC       Multi-pass membrane protein {ECO:0000250|UniProtKB:P03959}.
CC   -!- SIMILARITY: Belongs to the KdpA family. {ECO:0000250|UniProtKB:P03959}.
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DR   EMBL; Y08754; CAA70001.1; -; Genomic_DNA.
DR   AlphaFoldDB; P94456; -.
DR   SMR; P94456; -.
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:0008556; F:P-type potassium transmembrane transporter activity; IEA:InterPro.
DR   InterPro; IPR004623; KdpA.
DR   PANTHER; PTHR30607; PTHR30607; 1.
DR   Pfam; PF03814; KdpA; 1.
PE   3: Inferred from homology;
KW   Cell membrane; Ion transport; Membrane; Potassium; Potassium transport;
KW   Transmembrane; Transmembrane helix; Transport.
FT   CHAIN           1..>115
FT                   /note="Potassium-transporting ATPase potassium-binding
FT                   subunit"
FT                   /id="PRO_0000166482"
FT   TRANSMEM        8..28
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        60..80
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   NON_TER         115
SQ   SEQUENCE   115 AA;  13187 MW;  44B12639D940723B CRC64;
     MSFRNIHYFL LLIVIAVPLG KYLYVAFFEK GKIDRFFSPI EAVIYRLSGI RSLEEMTWKS
     YCTALLIVNA ALLGISYGLL RIQHYLPLNG AKVENMEPTL TFNTVVSFMT NTNLQ