FEATURES

FAMILY

cation transport ATPase (P-type) (TC 3.A.3) family

DESCRIPTION

Also known as KDPB_ECOLI, kdpB. Part of the high-affinity ATP-driven potassium transport (or Kdp) system, which catalyzes the hydrolysis of ATP coupled with the electrogenic transport of potassium into the cytoplasm (PubMed:2849541, PubMed:8499455, PubMed:23930894). This subunit is responsible for energy coupling to the transport system (PubMed:16354672). The system is composed of three essential subunits: KdpA, KdpB and KdpC (PubMed:2849541, PubMed:9858692). The complex also contains KdpF, a small non-essential subunit (PubMed:10608856). The KdpFABC complex exists as a dimer above concentrations of 30-50 nM, whereas the complex exists as a functional monomer at lower concentrations (PubMed:18298081).

EXTERNAL LINKS

kdpB

Potassium-transporting ATPase ATP-binding subunit

kdpB

Molecular Synopsis