HAMAP

Accession	MF_00285
Dates	1-JUN-2001 (Created) 9-JUN-2011 (Last updated, Version 51)

Data class

Protein

Predictors

HAMAP; MF_00285; [distribution of match scores in UniProtKB];[seed alignment for MF_00285]

Names

KdpB

Identifier

ATKB

Protein name

RecName: Full=Potassium-transporting ATPase B chain; EC=3.6.3.12; AltName: Full=ATP phosphohydrolase [potassium-transporting] B chain; AltName: Full=Potassium-binding and translocating subunit B; AltName: Full=Potassium-translocating ATPase B chain;

Gene name

kdpB

FUNCTION: One of the components of the high-affinity ATP-driven potassium transport (or KDP) system, which catalyzes the hydrolysis of ATP coupled with the exchange of hydrogen and potassium ions (By similarity).

CATALYTIC ACTIVITY: ATP + H(2)O + K(+)(Out) = ADP + phosphate + K(+)(In).

SUBCELLULAR LOCATION: Cell membrane; Multi-pass membrane protein (By similarity).

SUBCELLULAR LOCATION: Cell inner membrane; Multi-pass membrane protein (By similarity).

SIMILARITY: Belongs to the cation transport ATPase (P-type) (TC 3.A.3) family. Type IA subfamily.

Pfam	PF00122; E1-E2_ATPase; 1; PF00702; Hydrolase; 1;
PRINTS	PR00119; CATATPASE; 1; PR00120; HATPASE; 1;
TIGRFAMs	TIGR01494; ATPase_P-type; 1; TIGR01497; KdpB; 1;
PROSITE	PS00154; ATPASE_E1_E2; 1;
General	Transmembrane; -; 7; trigger=Yes;

Cell inner membrane.

Cell membrane, Hydrolase, Transport, Ion transport, Potassium, Potassium transport, Membrane, Transmembrane, Phosphoprotein, Magnesium, Metal-binding, ATP-binding, Nucleotide-binding, Transmembrane helix.

GO:0005524; Molecular function: ATP binding.
GO:0000287; Molecular function: magnesium ion binding.
GO:0008556; Molecular function: potassium-transporting ATPase activity.
GO:0006813; Biological process: potassium ion transport.
GO:0005886; Cellular component: plasma membrane.

From: ATKB_ECOLI (P03960)
Key		From		To		Description		Condition		FTGroup
METAL		518		518		Magnesium (By similarity)		D
METAL		522		522		Magnesium (By similarity)		D
ACT_SITE		307		307		4-aspartylphosphate intermediate (By similarity)		D

Size range:	665-744 amino acids
Related UniRules:	None
Template:	P03960 (ATKB_ECOLI)
Scope:	Bacteria Archaea
Fusion:	Nter: None; Cter: None
Duplicate:	in NOSS1, LISIN, STAAM, STAAN
Plasmid encoded:	in DEIRA, HALSA, LISIN, RHIME
Comments:	The S.typhi ortholog has a 112 amino acid internal deletion and is not used in the alignments.