ATP4A_HUMAN

Evidence for PS localization

GO

G2C

SynGO

SynaptomeDB

Functions

The catalytic subunit of the gastric H(+)/K(+) ATPase pump which transports H(+) ions in exchange for K(+) ions across the apical membrane of parietal cells. Uses ATP as an energy source to pump H(+) ions to the gastric lumen while transporting K(+) ion from the lumen into the cell . Remarkably generates a million-fold proton gradient across the gastric parietal cell membrane, acidifying the gastric juice down to pH 1 . 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 that shifts the pump conformation from inward-facing (E1) to outward-facing state (E2). The release of the H(+) ion in the stomach lumen is followed by binding of K(+) ion converting the pump conformation back to the E1 state . [View more on UniProt]

Protein features

Binary interactions with known binding regions

Interacting region for partners were not defined.

Network

Isoforms

Disease-causing germline mutations

No data found.

Linear motifs

No annotated instance was found. To search for linear motifs, use the ELM prediction server.

Fingerprint

Molecular function

Biological process

Disease

No data found.

All partners