Urotensin receptor


More information on this family may be found on the IUPHAR-DB family and introduction pages.


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The urotensin-II (U-II) receptor (UT, nomenclature as agreed by NC-IUPHAR, [8,11]) is activated by the endogenous dodecapeptide U-II, originally isolated from the urophysis, the endocrine organ of the caudal neurosecretory system of teleost fish [2]. Several structural forms of U-II exist in fish and amphibians. The Goby orthologue was used to identify U-II as the cognate ligand for the predicted receptor encoded by the rat gene gpr14 [6,17,20-21]. Human U-II (derived from ENSG00000049247), an 11-amino-acid peptide [6], retains the cyclohexapeptide sequence of goby U-II that is thought to be important in ligand binding [3,13]. This sequence is also conserved in the deduced amino-acid sequence of rat U-II (14 amino-acids) and mouse U-II (14 amino-acids), although the N-terminal is more divergent from the human sequence [5]. A second endogenous ligand for UT has been discovered in rat [25]. The urotensin II-related peptide (URP), an octapeptide, is derived from a different gene, but shares the C-terminal sequence (CFWKYCV) common to U-II from other species. Identical sequences to rat URP are predicted for the mature mouse and human peptides.


Unless otherwise stated all data refer to the human proteins. Gene information is provided for human (Hs), mouse (Mm) and rat (Rn).

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