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Potassium-transporting ATPase subunit beta

UniProtKB accession:  P18434
Grouped By:  Matching UniProtKB accession
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Polymer Entities matching query 4
Go to UniProtKB:  P18434
UniProtKB description:  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 (By similarity). 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 (PubMed:19387495, PubMed:29618813).
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Structure Features
Determination Methodology


Sequence Features
Number of Source Taxonomies


Experimental Features
Experimental Method
Resolution


Organisms
Organism
Taxonomy


Protein Domains
SCOP/SCOPe Domain
CATH Domain
ECOD Domain
InterPro Domain


Function
GO Molecular Function
GO Biological Process
[ 12+ ]
GO Cellular Component
[ 3+ ]