UCN3

Urocortin-3 is a protein that, in humans, is encoded by the UCN3 gene. It belongs to the corticotropin-releasing hormone family.

UCN3
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 2RMH, 3N93
Identifiers
Aliases	UCN3, SCP, SPC, UCNIII, urocortin 3
External IDs	OMIM: 605901; MGI: 1932970; HomoloGene: 49959; GeneCards: UCN3; OMA:UCN3 - orthologs
Gene location (Human) Chr. Chromosome 10 (human) Band 10p15.1 Start 5,364,966 bp End 5,374,692 bp
Gene location (Mouse) Chr. Chromosome 13 (mouse) Band 13|13 A1 Start 3,990,688 bp End 3,995,349 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in islet of Langerhans olfactory zone of nasal mucosa mucosa of transverse colon rectum body of pancreas anterior pituitary gallbladder duodenum sigmoid colon muscle layer of sigmoid colon Top expressed in islet of Langerhans duodenum nucleus of stria terminalis jejunum colon primary visual cortex More reference expression data BioGPS More reference expression data
Gene ontology Molecular function G protein-coupled receptor binding corticotropin-releasing hormone receptor 2 binding hormone activity corticotropin-releasing hormone receptor binding Cellular component neuron projection varicosity axon terminus axon extracellular region extracellular space intracellular anatomical structure Biological process digestion response to stress cellular response to nutrient levels positive regulation of insulin secretion response to immobilization stress response to glucose response to starvation cellular response to hypoxia positive regulation of membrane potential response to corticosterone regulation of signaling receptor activity adenylate cyclase-activating G protein-coupled receptor signaling pathway hormone-mediated signaling pathway Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 114131 83428 Ensembl ENSG00000178473 ENSMUSG00000044988 UniProt Q969E3 Q924A4 RefSeq (mRNA) NM_053049 NM_031250 RefSeq (protein) NP_444277 NP_112540 Location (UCSC) Chr 10: 5.36 – 5.37 Mb Chr 13: 3.99 – 4 Mb PubMed search
Wikidata
View/Edit Human View/Edit Mouse

Function

This gene is a member of the sauvagine/corticotropin-releasing factor/urotensin I family. It is structurally related to the corticotropin-releasing factor (CRF) gene and the encoded product is an endogenous ligand for CRF type 2 receptors.

In the brain it may be responsible for the effects of stress on appetite. In humans, it is also expressed by alpha cells and beta cells in the pancreas and is co-released with glucagon and insulin to promote somatostatin release from neighboring delta cells, which provides negative feedback on glucagon and insulin secretion. In spite of the gene family name similarity, the product of this gene has no sequence similarity to Urotensin-II.

Further reading

• Hauger RL, Grigoriadis DE, Dallman MF, Plotsky PM, Vale WW, Dautzenberg FM (Mar 2003). "International Union of Pharmacology. XXXVI. Current status of the nomenclature for receptors for corticotropin-releasing factor and their ligands". Pharmacological Reviews. 55 (1): 21–6. doi:10.1124/pr.55.1.3. PMID 12615952. S2CID 1572317.
• Florio P, Torres PB, Torricelli M, Toti P, Vale W, Petraglia F (Dec 2006). "Human endometrium expresses urocortin II and III messenger RNA and peptides". Fertility and Sterility. 86 (6): 1766–70. doi:10.1016/j.fertnstert.2006.05.041. PMID 17074339.
• Imperatore A, Florio P, Torres PB, Torricelli M, Galleri L, Toti P, Occhini R, Picciolini E, Vale W, Petraglia F (Jul 2006). "Urocortin 2 and urocortin 3 are expressed by the human placenta, deciduas, and fetal membranes". American Journal of Obstetrics and Gynecology. 195 (1): 288–95. doi:10.1016/j.ajog.2005.12.048. PMID 16626608.
• Saruta M, Takahashi K, Suzuki T, Fukuda T, Torii A, Sasano H (Jul 2005). "Urocortin 3/stresscopin in human colon: possible modulators of gastrointestinal function during stressful conditions". Peptides. 26 (7): 1196–206. doi:10.1016/j.peptides.2005.01.014. PMID 15949638. S2CID 23604531.
• Chang CL, Hsu SY (Oct 2004). "Ancient evolution of stress-regulating peptides in vertebrates". Peptides. 25 (10): 1681–8. doi:10.1016/j.peptides.2004.05.022. PMID 15476935. S2CID 25716793.
• Takahashi K, Totsune K, Murakami O, Saruta M, Nakabayashi M, Suzuki T, Sasano H, Shibahara S (Apr 2004). "Expression of urocortin III/stresscopin in human heart and kidney". The Journal of Clinical Endocrinology and Metabolism. 89 (4): 1897–903. doi:10.1210/jc.2003-031663. PMID 15070962.
• Seres J, Bornstein SR, Seres P, Willenberg HS, Schulte KM, Scherbaum WA, Ehrhart-Bornstein M (Feb 2004). "Corticotropin-releasing hormone system in human adipose tissue". The Journal of Clinical Endocrinology and Metabolism. 89 (2): 965–70. doi:10.1210/jc.2003-031299. PMID 14764822.
• Chanalaris A, Lawrence KM, Stephanou A, Knight RD, Hsu SY, Hsueh AJ, Latchman DS (Oct 2003). "Protective effects of the urocortin homologues stresscopin (SCP) and stresscopin-related peptide (SRP) against hypoxia/reoxygenation injury in rat neonatal cardiomyocytes". Journal of Molecular and Cellular Cardiology. 35 (10): 1295–305. doi:10.1016/S0022-2828(03)00244-X. PMID 14519439.
• Hsu SY, Hsueh AJ (May 2001). "Human stresscopin and stresscopin-related peptide are selective ligands for the type 2 corticotropin-releasing hormone receptor". Nature Medicine. 7 (5): 605–11. doi:10.1038/87936. PMID 11329063. S2CID 22916906.