Somatostatin Receptor 2 Antibody (YA3946)

Cell membrane; Multi-pass membrane protein; Cytoplasm

Tissue_specificity:It is expressed (at protein levels) in both pancreatic α and β cells. Its expression level in the pancreas is higher than other somatostatin receptors. It is also expressed in the brain and kidneys, but less so in the jejunum, colon, and liver. In the developing nervous system, it is expressed in the cortex of the anterior plate in early stages, and enriched in the outer layer of the germinal area in later stages. In the cerebellum, it is expressed in the deep layers of the outer granular layer at 19 weeks of gestation. This expression pattern persists until birth but disappears in adulthood.

P30874 has 2 isomers: P30874-1: 41333 Da (predicted); P30874-2: 40007 Da (predicted).
Phosphorylated on serine and threonine residues in response to agonist stimulation, leading to receptor desensitization and rapid internalization. Phosphorylated to a greater extent on serine than threonine residues. Threonine phosphorylation is required for arrestin binding and receptor endocytosis but is not necessary for desensitization (By similarity)

Homodimer and heterodimer with SSTR3 and SSTR5. Heterodimerization with SSTR3 inactivates SSTR3 receptor function. Heterodimerization with SSTR5 is enhanced by agonist stimulation of SSTR2 and increases SSTR2 cell growth inhibition activity. Following agonist stimulation, homodimers dissociate into monomers which is required for receptor internalization. Interacts with beta-arrestin; this interaction is necessary for receptor internalization and is destabilized by heterodimerization with SSTR5 which results in increased recycling of SSTR2 to the cell surface. Interacts (via C-terminus) with SHANK1 (via PDZ domain)

P30874