Tuberoinfundibular peptide of 39 residues is a protein that in humans is encoded by the PTH2gene.[5][6]
TIP39 is related to parathyroid hormone (PTH; MIM 168450) and PTH-related protein (PTHRP; MIM 168470) and is a ligand for PTH receptor-2 (PTHR2; MIM 601469) (John et al., 2002).[supplied by OMIM][6]
The molecular interaction of TIP39 with the PTH2 receptor has been characterized in full 3D molecular detail, identifying among other residues, Tyr-318 in transmembrane helix 5 as a key residue for high affinity binding [7]
Expression of TIP39 has been linked to social interaction in both zebrafish [8] and rats.[9] In these species, mutations of TIP39 or its receptor lead to abnormal social behavior.[10][11]
Usdin TB, Hoare SR, Wang T, et al. (1999). "TIP39: a new neuropeptide and PTH2-receptor agonist from hypothalamus". Nat. Neurosci. 2 (11): 941–3. doi:10.1038/14724. PMID10526330. S2CID22744817.
Della Penna K, Kinose F, Sun H, et al. (2003). "Tuberoinfundibular peptide of 39 residues (TIP39): molecular structure and activity for parathyroid hormone 2 receptor". Neuropharmacology. 44 (1): 141–53. doi:10.1016/S0028-3908(02)00335-0. PMID12559132. S2CID9974844.
Misiano P, Scott BB, Scheideler MA, Garnier M (2004). "PTH2 receptor-mediated inhibitory effect of parathyroid hormone and TIP39 on cell proliferation". Eur. J. Pharmacol. 468 (3): 159–66. doi:10.1016/S0014-2999(03)01673-X. PMID12754053.