Receptor for somatostatin-14 and -28. This receptor is coupled via pertussis toxin sensitive G proteins to inhibition of adenylyl cyclase. In addition it stimulates phosphotyrosine phosphatase and PLC via pertussis toxin insensitive as well as sensitive G proteins. Inhibits calcium entry by suppressing voltage-dependent calcium channels. Acts as the functionally dominant somatostatin receptor in pancreatic alpha- and beta-cells where it mediates the inhibitory effect of somatostatin-14 on hormone secretion. Inhibits cell growth through enhancement of MAPK1 and MAPK2 phosphorylation and subsequent up-regulation of CDKN1B. Stimulates neuronal migration and axon outgrowth and may participate in neuron development and maturation during brain development. Mediates negative regulation of insulin receptor signaling through PTPN6. Inactivates SSTR3 receptor function following heterodimerization.
Gene References into Functions
SRIF can inhibit testosterone secretion through the sst2A receptor; local inhibitory action of SRIF is probably autocrine & might involve testosterone-induced increase of sst2 receptor expression in immature Leydig cells [SST2A]PMID:12646058
is a potent inhibitory receptor displaying a unique set of interrelated dynamic features of agonist-dependent dimerization, dissociation, internalization, and reassociation, a cascade of events that might be critical for receptor functionPMID:17053026
Data demonstrate that urotensin II and urotensin II-related peptide directly activate somatostatin receptors 2 and 5 and thus mimic the effect of somatostatin on its cognate receptors.PMID:18289730