Recombinant Human Gastrin-releasing peptide receptor (GRPR) Protein

Function

Receptor for gastrin-releasing peptide (GRP) (PubMed:1655761). Signals via association with G proteins that activate a phosphatidylinositol-calcium second messenger system, resulting in Akt phosphorylation. Contributes to the regulation of food intake. Contributes to the perception of prurient stimuli and transmission of itch signals in the spinal cord that promote scratching behavior, but does not play a role in the perception of pain. Contributes primarily to nonhistaminergic itch sensation. In one study, shown to act in the amygdala as part of an inhibitory network which inhibits memory specifically related to learned fear (By similarity). In another study, shown to contribute to disinhibition of glutamatergic cells in the auditory cortex via signaling on vasoactive intestinal peptide-expressing cells which leads to enhanced auditory fear memories (By similarity). Contributes to the induction of sighing through signaling in the pre-Botzinger complex, a cluster of several thousand neurons in the ventrolateral medulla responsible for inspiration during respiratory activity (By similarity)

Subcellular Location

Cell membrane (Multi-pass membrane protein)

Tissue Specificity

Highly expressed in pancreas (PubMed:11245983). Also expressed in stomach, adrenal cortex and brain (PubMed:11245983). In brain, expressed in cells throughout the cortex (PubMed:34610277)

• Corjay M.H. et al. Two distinct bombesin receptor subtypes are expressed and functional in human lung carcinoma cells. — J. Biol. Chem. (1991)
• Xiao D. et al. The human gastrin-releasing peptide receptor gene structure, its tissue expression and promoter. — Gene (2001)
• Ota T. et al. Complete sequencing and characterization of 21,243 full-length human cDNAs. — Nat. Genet. (2004)
• Mural R.J. et al. PubMed: CI-5GBDQ6B103N1E (JUL-)
• The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC). — Genome Res. (2004)
• Melzer S. et al. Bombesin-like peptide recruits disinhibitory cortical circuits and enhances fear memories. — Cell (2021)