There are two known receptors for the vasoactive intestinal peptide (VIP) termed VPAC1 and VPAC2.[1][2] These receptors bind both VIP and pituitary adenylate cyclase-activating polypeptide (PACAP) to some degree. Both receptors are members of the 7 transmembrane G protein-coupled receptor family.
Vasoactive intestinal peptide (VIP) and pituitary adenylate cyclase-activating peptide (PACAP) receptors are activated by the endogenous peptides VIP, PACAP-38, PACAP-27, peptide histidine isoleucineamide (PHI), peptide histidine methionineamide (PHM) and peptide histidine valine (PHV). “PACAP type II receptors” (VPAC1 and VPAC2 receptors) display comparable affinity for PACAP and VIP, whereas PACAP-27 and PACAP-38 are >100 fold more potent than VIP as agonists of most isoforms of the PAC1 receptor.[3]
References
^Laburthe M, Couvineau A, Marie JC (2002). "VPAC receptors for VIP and PACAP". Recept. Channels. 8 (3–4): 137–53. doi:10.1080/10606820213680. PMID 12529932.
^Laburthe M, Couvineau A (2002). "Molecular pharmacology and structure of VPAC Receptors for VIP and PACAP". Regul. Pept. 108 (2–3): 165–73. doi:10.1016/S0167-0115(02)00099-X. PMID 12220741. S2CID 21588275.
^"VIP and PACAP receptors". IUPHAR Guide to Pharmacology. The British Pharmacological Society (BPS) and the International Union of Basic and Clinical Pharmacology (IUPHAR).
External links
"VIP and PACAP Receptors". IUPHAR Database of Receptors and Ion Channels. International Union of Basic and Clinical Pharmacology.
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