Cholecystokinin a receptor

Cholecystokinin A receptor
PDB rendering based on 1d6g.
Available structures
PDB Ortholog search: RCSB
Identifiers
CCKAR Gene
RNA expression pattern
Cholecystokinin A receptor, N-terminal domain
molecular complex of cholecystokinin-8 and n-terminus of the cholecystokinin a receptor by nmr spectroscopy
Identifiers
Symbol CholecysA-Rec_N
Pfam InterPro IPR015276
SCOP SUPERFAMILY 1d6g

The Cholecystokinin A receptor is a human protein, also known as CCKAR or CCK1, with CCK1 now being the IUPHAR-recommended name.

This gene encodes a G-protein coupled receptor that binds non-sulfated members of the cholecystokinin (CCK) family of peptide hormones. This receptor is a major physiologic mediator of pancreatic enzyme secretion and smooth muscle contraction of the gallbladder and stomach. In the central and peripheral nervous system this receptor regulates satiety and the release of beta-endorphin and dopamine.[1]

The extracellular, N-terminal, domain of this protein adopts a tertiary structure consisting of a few helical turns and a disulfide-cross linked loop. It is required for interaction of the cholecystokinin A receptor with its corresponding hormonal ligand.[2]

Selective Ligands

Agonists

  • Cholecystokinin
  • Gastrin
  • CCK-4
  • SR-146,131
  • A-71623 - modified tetrapeptide, potent and selective CCKA agonist, IC50 3.7nM, 1200x selectivity over CCKB, CAS# 130408-77-4

Antagonists

See also

References

External links

Further reading

This article incorporates text from the United States National Library of Medicine, which is in the public domain.


This article incorporates text from the IPR015276