This domain represents the C-terminal region of the Neuromedin-U receptor 2, a rhodopsin-like GPCR member. It contains two potential casein kinase II phosphorylation sites at threonines residues and one protein kinase C phosphorylation site at a serine residue, which are important to regulate the receptor functionality. This receptor is predominantly expressed in the central nervous system, particularly in the medulla oblongata, pontine reticular formation, spinal cord and thalamus, as its physiological roles are related to modulation of sensory function, neuroendocrine control, food intake as well as with circadian rhythm. However, peripheral expression of this receptor has been determined and includes kidney (medulla), lung and trachea [1-3].

1: Identification of receptors for neuromedin U and its role in feeding. Howard AD, Wang R, Pong SS, Mellin TN, Strack A, Guan XM, Zeng Z, Williams DL Jr, Feighner SD, Nunes CN, Murphy B, Stair JN, Yu H, Jiang Q, Clements MK, Tan CP, McKee KK, Hreniuk DL, McDonald TP, Lynch KR, Evans JF, Austin CP, Caskey CT, Van der Ploeg LH, Liu Q; Nature. 2000;406:70-74. PMID:10894543

2: Identification and characterization of two neuromedin U receptors differentially expressed in peripheral tissues and the central nervous system. Raddatz R, Wilson AE, Artymyshyn R, Bonini JA, Borowsky B, Boteju LW, Zhou S, Kouranova EV, Nagorny R, Guevarra MS, Dai M, Lerman GS, Vaysse PJ, Branchek TA, Gerald C, Forray C, Adham N; J Biol Chem. 2000;275:32452-32459. PMID:10899166

3: Cloning and characterization of murine neuromedin U receptors. Funes S, Hedrick JA, Yang S, Shan L, Bayne M, Monsma FJ Jr, Gustafson EL; Peptides. 2002;23:1607-1615. PMID:12217421