ID KDPB_RHILO Reviewed; 697 AA.
AC Q98GX6;
DT 17-JAN-2003, integrated into UniProtKB/Swiss-Prot.
DT 01-OCT-2001, sequence version 1.
DT 27-MAR-2024, entry version 140.
DE RecName: Full=Potassium-transporting ATPase ATP-binding subunit {ECO:0000255|HAMAP-Rule:MF_00285};
DE EC=7.2.2.6 {ECO:0000255|HAMAP-Rule:MF_00285};
DE AltName: Full=ATP phosphohydrolase [potassium-transporting] B chain {ECO:0000255|HAMAP-Rule:MF_00285};
DE AltName: Full=Potassium-binding and translocating subunit B {ECO:0000255|HAMAP-Rule:MF_00285};
DE AltName: Full=Potassium-translocating ATPase B chain {ECO:0000255|HAMAP-Rule:MF_00285};
GN Name=kdpB {ECO:0000255|HAMAP-Rule:MF_00285}; OrderedLocusNames=mll3130;
OS Mesorhizobium japonicum (strain LMG 29417 / CECT 9101 / MAFF 303099)
OS (Mesorhizobium loti (strain MAFF 303099)).
OC Bacteria; Pseudomonadota; Alphaproteobacteria; Hyphomicrobiales;
OC Phyllobacteriaceae; Mesorhizobium.
OX NCBI_TaxID=266835;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=LMG 29417 / CECT 9101 / MAFF 303099;
RX PubMed=11214968; DOI=10.1093/dnares/7.6.331;
RA Kaneko T., Nakamura Y., Sato S., Asamizu E., Kato T., Sasamoto S.,
RA Watanabe A., Idesawa K., Ishikawa A., Kawashima K., Kimura T., Kishida Y.,
RA Kiyokawa C., Kohara M., Matsumoto M., Matsuno A., Mochizuki Y.,
RA Nakayama S., Nakazaki N., Shimpo S., Sugimoto M., Takeuchi C., Yamada M.,
RA Tabata S.;
RT "Complete genome structure of the nitrogen-fixing symbiotic bacterium
RT Mesorhizobium loti.";
RL DNA Res. 7:331-338(2000).
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 is
CC responsible for energy coupling to the transport system and for the
CC release of the potassium ions to the cytoplasm. {ECO:0000255|HAMAP-
CC Rule:MF_00285}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=ATP + H2O + K(+)(out) = ADP + H(+) + K(+)(in) + phosphate;
CC Xref=Rhea:RHEA:16777, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:29103, ChEBI:CHEBI:30616, ChEBI:CHEBI:43474,
CC ChEBI:CHEBI:456216; EC=7.2.2.6; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_00285};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:16778;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00285};
CC -!- SUBUNIT: The system is composed of three essential subunits: KdpA, KdpB
CC and KdpC. {ECO:0000255|HAMAP-Rule:MF_00285}.
CC -!- SUBCELLULAR LOCATION: Cell inner membrane {ECO:0000255|HAMAP-
CC Rule:MF_00285}; Multi-pass membrane protein {ECO:0000255|HAMAP-
CC Rule:MF_00285}.
CC -!- SIMILARITY: Belongs to the cation transport ATPase (P-type) (TC 3.A.3)
CC family. Type IA subfamily. {ECO:0000255|HAMAP-Rule:MF_00285}.
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DR EMBL; BA000012; BAB50090.1; -; Genomic_DNA.
DR RefSeq; WP_010911437.1; NC_002678.2.
DR AlphaFoldDB; Q98GX6; -.
DR SMR; Q98GX6; -.
DR KEGG; mlo:mll3130; -.
DR PATRIC; fig|266835.9.peg.2495; -.
DR eggNOG; COG2216; Bacteria.
DR HOGENOM; CLU_025728_2_0_5; -.
DR Proteomes; UP000000552; Chromosome.
DR GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR GO; GO:0016887; F:ATP hydrolysis activity; IEA:InterPro.
DR GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0008556; F:P-type potassium transmembrane transporter activity; IEA:UniProtKB-UniRule.
DR CDD; cd02078; P-type_ATPase_K; 1.
DR Gene3D; 3.40.1110.10; Calcium-transporting ATPase, cytoplasmic domain N; 1.
DR Gene3D; 2.70.150.10; Calcium-transporting ATPase, cytoplasmic transduction domain A; 1.
DR Gene3D; 3.40.50.1000; HAD superfamily/HAD-like; 1.
DR HAMAP; MF_00285; KdpB; 1.
DR InterPro; IPR023299; ATPase_P-typ_cyto_dom_N.
DR InterPro; IPR018303; ATPase_P-typ_P_site.
DR InterPro; IPR023298; ATPase_P-typ_TM_dom_sf.
DR InterPro; IPR008250; ATPase_P-typ_transduc_dom_A_sf.
DR InterPro; IPR036412; HAD-like_sf.
DR InterPro; IPR023214; HAD_sf.
DR InterPro; IPR006391; P-type_ATPase_bsu_IA.
DR InterPro; IPR001757; P_typ_ATPase.
DR InterPro; IPR044492; P_typ_ATPase_HD_dom.
DR NCBIfam; TIGR01494; ATPase_P-type; 2.
DR NCBIfam; TIGR01497; kdpB; 1.
DR PANTHER; PTHR43743; POTASSIUM-TRANSPORTING ATPASE ATP-BINDING SUBUNIT; 1.
DR PANTHER; PTHR43743:SF1; POTASSIUM-TRANSPORTING ATPASE ATP-BINDING SUBUNIT; 1.
DR Pfam; PF00122; E1-E2_ATPase; 1.
DR Pfam; PF00702; Hydrolase; 1.
DR PRINTS; PR00119; CATATPASE.
DR SFLD; SFLDG00002; C1.7:_P-type_atpase_like; 1.
DR SFLD; SFLDF00027; p-type_atpase; 1.
DR SUPFAM; SSF81653; Calcium ATPase, transduction domain A; 1.
DR SUPFAM; SSF81665; Calcium ATPase, transmembrane domain M; 1.
DR SUPFAM; SSF56784; HAD-like; 1.
DR PROSITE; PS00154; ATPASE_E1_E2; 1.
PE 3: Inferred from homology;
KW ATP-binding; Cell inner membrane; Cell membrane; Ion transport; Magnesium;
KW Membrane; Metal-binding; Nucleotide-binding; Phosphoprotein; Potassium;
KW Potassium transport; Translocase; Transmembrane; Transmembrane helix;
KW Transport.
FT CHAIN 1..697
FT /note="Potassium-transporting ATPase ATP-binding subunit"
FT /id="PRO_0000046130"
FT TRANSMEM 36..56
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00285"
FT TRANSMEM 66..86
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00285"
FT TRANSMEM 218..238
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00285"
FT TRANSMEM 253..273
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00285"
FT TRANSMEM 595..615
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00285"
FT TRANSMEM 631..651
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00285"
FT TRANSMEM 669..689
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00285"
FT ACT_SITE 306
FT /note="4-aspartylphosphate intermediate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00285"
FT BINDING 343
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00285"
FT BINDING 347
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00285"
FT BINDING 376..383
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00285"
FT BINDING 394
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00285"
FT BINDING 526
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00285"
FT BINDING 530
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00285"
SQ SEQUENCE 697 AA; 73406 MW; 76FACE25520BAF81 CRC64;
MSQLKSSAIM DARILWPAFG GAFRKLDPRT LARNPVMFVV AIVSALTSVL FLRDLITGGG
DLRFTLQIII WLWFTVLFAN FAEAVAEGRG KAQADSLRKA RTETQAKLLA GEDRSKFKLV
PGTSLKVGDI VLVEAGDIIP SDGEVVEGVA SVNEAAITGE SAPVIRESGG DRSAVTGGTQ
VLSDWIRVRI TAAAGHTFLD RMISLVEGAE RQKTPNEIAL NILLVGMTLI FVLATATIPS
FASYSGGYIS VTVLVALFVT LIPTTIGALL SAIGIAGMDR LVRFNVLAMS GRAVEAAGDV
DTLLLDKTGT ITLGNRQATD FRPVKGVTEQ ELADAAQLAS LADETPEGRS IVVLAKEKYG
IRARDMATLH ATFVPFTAQT RMSGVDIDGS SVRKGAVDSV LAHVNQSTVA SHATRPNSDT
IRDLQAIADE VAKSGGTPLA VERDGRLLGV VHLKDIVKGG IRERFAELRK MGIRTVMITG
DNPMTAAAIA AEAGVDDFLA QATPEDKLKL IRDEQAKGKL VAMCGDGTND APALAQADVG
VAMNTGTVAA REAGNMVDLD SDPTKLIEIV EIGKALLMTR GSLTTFSIAN DVAKYFAIIP
AMFAVFYVAP GQSTGPLQAL NIMHLATPQS AILSAIIFNA LIIIALIPLS LRGVKYRAIG
AGALLSRNLL VYGLGGIIVP FVGIKIIDMA VTALGLA
//
