Recombinant Human Potassium-transporting ATPase subunit beta (ATP4B),Truncated

Uniprot Id

P51164

Target Species

Human

Target Name

ATP4B

Target Full Name

Potassium-transporting ATPase subunit beta

Target Function

The beta subunit of the gastric H(+)/K(+) ATPase pump which transports H(+) ions in exchange for K(+) ions across the apical membrane of parietal cells. Plays a structural and regulatory role in the assembly and membrane targeting of a functionally active pump. Within a transport cycle, the transfer of a H(+) ion across the membrane is coupled to ATP hydrolysis and is associated with a transient phosphorylation of the alpha subunit that shifts the pump conformation from inward-facing (E1) to outward-facing state (E2). Interacts with the phosphorylation domain of the alpha subunit and functions as a ratchet, stabilizing the lumenal-open E2 conformation and preventing the reverse reaction of the transport cycle.

Target Subcellular Location

Apical cell membrane; Single-pass type II membrane protein. Cell membrane; Single-pass type II membrane protein.

Target Protein Families

X(+)/potassium ATPases subunit beta family

Target Research Area

Transport, Signal Transduction

Target Synonyms

Gastric H(+)/K(+) ATPase subunit beta; ATP4B; ATP4B_HUMAN; ATP6B; ATPase H+/K+ exchanging beta polypeptide; ATPase H+/K+ transporting beta polypeptide; Gastric H K ATPase catalytic subunit; Gastric H(+)/K(+) ATPase subunit beta; Gastric H+/K+ ATPase beta subunit; Gastric hydrogen potassium ATPase; Gastric hydrogen potassium ATPase beta; Hydrogen/potassium exchanging ATPase 4B; OTTHUMP00000178856; Parietal cell antigen; Potassium transporting ATPase beta chain; Potassium transporting ATPase subunit beta; Potassium-transporting ATPase subunit beta; Proton pump; Proton pump beta chain

Target Background

The protein encoded by this gene belongs to a family of P-type cation-transporting ATPases. The gastric H+, K+-ATPase is a heterodimer consisting of a high molecular weight catalytic alpha subunit and a smaller but heavily glycosylated beta subunit. This enzyme is a proton pump that catalyzes the hydrolysis of ATP coupled with the exchange of H(+) and K(+) ions across the plasma membrane. It is also responsible for gastric acid secretion. This gene encodes the beta subunit of the gastric H+, K+-ATPase.