Gastrin-releasing peptide

GRP
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 2N0B, 2N0C, 2N0D, 2N0E, 2N0F, 2N0G, 2N0H
Identifiers
Aliases	GRP, BN, GRP-10, preproprogastrin releasing peptide
External IDs	OMIM: 137260; MGI: 95833; HomoloGene: 1580; GeneCards: GRP; OMA:GRP - orthologs
Gene location (Human) Chr. Chromosome 18 (human) Band 18q21.32 Start 59,220,158 bp End 59,230,774 bp
Gene location (Mouse) Chr. Chromosome 18 (mouse) Band 18 E1|18 38.98 cM Start 66,005,891 bp End 66,019,667 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in testicle gonad hair follicle gastric mucosa decidua cartilage tissue male germ cell sperm epithelium of lactiferous gland lactiferous duct Top expressed in subiculum lumbar subsegment of spinal cord suprachiasmatic nucleus barrel cortex ventral tegmental area hippocampus proper external carotid artery dentate gyrus of hippocampal formation granule cell embryo dorsomedial hypothalamic nucleus More reference expression data BioGPS More reference expression data
Gene ontology Molecular function signaling receptor binding neuropeptide hormone activity Cellular component extracellular region extracellular space secretory granule lumen cytoplasmic vesicle Biological process neuropeptide signaling pathway signal transduction social behavior psychomotor behavior response to external biotic stimulus positive regulation of peptide hormone secretion positive regulation of phospholipase C-activating G protein-coupled receptor signaling pathway regulation of signaling receptor activity G protein-coupled receptor signaling pathway Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 2922 225642 Ensembl ENSG00000134443 ENSMUSG00000024517 UniProt P07492 Q8R1I2 RefSeq (mRNA) NM_001012512 NM_001012513 NM_002091 NM_175012 RefSeq (protein) NP_002082 NP_001012531 NP_001012530 NP_778177 Location (UCSC) Chr 18: 59.22 – 59.23 Mb Chr 18: 66.01 – 66.02 Mb PubMed search
Wikidata
View/Edit Human View/Edit Mouse

Gastrin-releasing peptide, also known as GRP, is a neuropeptide, a regulatory molecule that has been implicated in a number of physiological and pathophysiological processes. Most notably, GRP stimulates the release of gastrin from the G cells of the stomach.

The gene from which GRP is derived encodes a number of bombesin-like peptides. Its 148-amino acid preproprotein, following cleavage of a signal peptide, is further processed to produce either the 27-amino acid gastrin-releasing peptide or the 10-amino acid neuromedin C. These smaller peptides regulate numerous functions of the gastrointestinal and central nervous systems, including release of gastrointestinal hormones, smooth muscle cell contraction, and epithelial cell proliferation.

Function

Gastrin-releasing peptide is a regulatory human peptide that elicits gastrin release and regulates gastric acid secretion and enteric motor function. The post-ganglionic fibers of the vagus nerve that innervate the G cells of the stomach release GRP, which stimulates the G cells to release gastrin.

GRP is also involved in the biology of the circadian system, playing a role in the signaling of light to the master circadian oscillator in the suprachiasmatic nuclei of the hypothalamus.

Furthermore, GRP seems to mediate certain aspects of stress. This is the reason for the observed fact that atropine does not block the vagal effect on gastrin release.

Gene

The human GRP gene is located on chromosome 18q21. PreproGRP (the unprocessed form of GRP) is encoded in three exons separated by two introns. Alternative splicing results in multiple transcript variants encoding different isoforms.

Synthesis

PreproGRP begins with signal peptidase cleavage to generate the proGRP, which is then processed (by proteolytic cleavages), to form smaller GRP peptides.

These smaller peptides are released by the post-ganglionic fibers of the vagus nerve, which innervate the G cells of the stomach and stimulate them to release gastrin. GRP regulates numerous functions of the gastrointestinal and central nervous systems, including release of gastrointestinal hormones, smooth muscle cell contraction, and epithelial cell proliferation.

Clinical significance

Gastrin-releasing peptide and neuromedin C, it is postulated, play a role in human cancers of the lung, colon, stomach, pancreas, breast, and prostate.

See also

• Pro-Gastrin-Releasing-Peptide

Further reading

• Merali Z, McIntosh J, Anisman H (2000). "Role of bombesin-related peptides in the control of food intake". Neuropeptides. 33 (5): 376–86. doi:10.1054/npep.1999.0054. PMID 10657515.
• Baraniuk JN, Lundgren JD, Shelhamer JH, Kaliner MA (1992). "Gastrin releasing peptide (GRP) binding sites in human bronchi". Neuropeptides. 21 (2): 81–4. doi:10.1016/0143-4179(92)90518-2. PMID 1557184.
• Spindel ER, Zilberberg MD, Habener JF, Chin WW (1986). "Two prohormones for gastrin-releasing peptide are encoded by two mRNAs differing by 19 nucleotides". Proc. Natl. Acad. Sci. U.S.A. 83 (1): 19–23. doi:10.1073/pnas.83.1.19. PMC 322782. PMID 3001723.
• Sausville EA, Lebacq-Verheyden AM, Spindel ER, et al. (1986). "Expression of the gastrin-releasing peptide gene in human small cell lung cancer. Evidence for alternative processing resulting in three distinct mRNAs". J. Biol. Chem. 261 (5): 2451–7. PMID 3003116.
• Lebacq-Verheyden AM, Bertness V, Kirsch I, et al. (1987). "Human gastrin-releasing peptide gene maps to chromosome band 18q21". Somat. Cell Mol. Genet. 13 (1): 81–6. doi:10.1007/BF02422302. PMID 3027901.
• Naylor SL, Sakaguchi AY, Spindel E, Chin WW (1987). "Human gastrin-releasing peptide gene is located on chromosome 18". Somat. Cell Mol. Genet. 13 (1): 87–91. doi:10.1007/BF02422303. PMID 3027902.
• Lebacq-Verheyden AM, Kasprzyk PG, Raum MG, et al. (1989). "Posttranslational processing of endogenous and of baculovirus-expressed human gastrin-releasing peptide precursor". Mol. Cell. Biol. 8 (8): 3129–35. doi:10.1128/MCB.8.8.3129. PMC 363540. PMID 3211139.
• Spindel ER, Chin WW, Price J, et al. (1984). "Cloning and characterization of cDNAs encoding human gastrin-releasing peptide". Proc. Natl. Acad. Sci. U.S.A. 81 (18): 5699–703. doi:10.1073/pnas.81.18.5699. PMC 391778. PMID 6207529.
• Benya RV, Kusui T, Pradhan TK, et al. (1995). "Expression and characterization of cloned human bombesin receptors". Mol. Pharmacol. 47 (1): 10–20. PMID 7838118.
• Moody TW, Zia F, Venugopal R, et al. (1994). "Corticotropin-releasing factor stimulates cyclic AMP, arachidonic acid release, and growth of lung cancer cells". Peptides. 15 (2): 281–5. doi:10.1016/0196-9781(94)90013-2. PMID 8008632.
• Frankel A, Tsao MS, Viallet J (1994). "Receptor subtype expression and responsiveness to bombesin in cultured human bronchial epithelial cells". Cancer Res. 54 (7): 1613–6. PMID 8137267.
• Lü F, Jin T, Drucker DJ (1996). "Proglucagon gene expression is induced by gastrin-releasing peptide in a mouse enteroendocrine cell line". Endocrinology. 137 (9): 3710–6. doi:10.1210/en.137.9.3710. PMID 8756537.
• Bertenshaw GP, Turk BE, Hubbard SJ, et al. (2001). "Marked differences between metalloproteases meprin A and B in substrate and peptide bond specificity". J. Biol. Chem. 276 (16): 13248–55. doi:10.1074/jbc.M011414200. PMID 11278902.
• Lambeir AM, Durinx C, Proost P, et al. (2001). "Kinetic study of the processing by dipeptidyl-peptidase IV/CD26 of neuropeptides involved in pancreatic insulin secretion". FEBS Lett. 507 (3): 327–30. doi:10.1016/S0014-5793(01)02982-9. hdl:10067/366910151162165141. PMID 11696365.
• Mason S, Smart D, Marshall IC, et al. (2002). "Identification and characterisation of functional bombesin receptors in human astrocytes". Eur. J. Pharmacol. 438 (1–2): 25–34. doi:10.1016/S0014-2999(02)01268-2. PMID 11906707.
• Carroll RE, Matkowskyj K, Saunthararajah Y, et al. (2002). "Contribution of gastrin-releasing peptide and its receptor to villus development in the murine and human gastrointestinal tract". Mech. Dev. 113 (2): 121–30. doi:10.1016/S0925-4773(02)00032-1. PMID 11960700.
• Uchida K, Kojima A, Morokawa N, et al. (2003). "Expression of progastrin-releasing peptide and gastrin-releasing peptide receptor mRNA transcripts in tumor cells of patients with small cell lung cancer". J. Cancer Res. Clin. Oncol. 128 (12): 633–40. doi:10.1007/s00432-002-0392-8. PMID 12474049.
• Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• Schneider J, Philipp M, Velcovsky HG, et al. (2003). "Pro-gastrin-releasing peptide (ProGRP), neuron specific enolase (NSE), carcinoembryonic antigen (CEA) and cytokeratin 19-fragments (CYFRA 21-1) in patients with lung cancer in comparison to other lung diseases". Anticancer Res. 23 (2A): 885–93. PMID 12820318.

External links

• Gastrin-Releasing+Peptide at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
• Nosek, Thomas M. "Section 6/6ch2/s6ch2_35". Essentials of Human Physiology. Archived from the original on 2016-03-24.