Tuberoinfundibular peptide of 39 residues is a protein that in humans is encoded by the PTH2gene.[1][2]
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][2]
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 [3]
References
↑John MR, Arai M, Rubin DA, Jonsson KB, Juppner H (Feb 2002). "Identification and characterization of the murine and human gene encoding the tuberoinfundibular peptide of 39 residues". Endocrinology. 143 (3): 1047–57. doi:10.1210/en.143.3.1047. PMID11861531.
↑Weaver RE, Mobarec JC, Wigglesworth MJ, Reynolds CA, Donnelly D (2017). "High affinity binding of the peptide agonist TIP-39 to the Parathyroid hormone 2 (PTH2) receptor requires the hydroxyl group of Tyr-318 on transmembrane helix 5". Biochemical Pharmacology. doi:10.1016/j.bcp.2016.12.013.
Further reading
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.
Hoare SR, Clark JA, Usdin TB (2000). "Molecular determinants of tuberoinfundibular peptide of 39 residues (TIP39) selectivity for the parathyroid hormone-2 (PTH2) receptor. N-terminal truncation of TIP39 reverses PTH2 receptor/PTH1 receptor binding selectivity". J. Biol. Chem. 275 (35): 27274–83. doi:10.1074/jbc.M003910200. PMID10854439.
Hansen IA, Jakob O, Wortmann S, et al. (2002). "Characterization of the human and mouse genes encoding the tuberoinfundibular peptide of 39 residues, a ligand of the parathyroid hormone receptor family". J. Endocrinol. 174 (1): 95–102. doi:10.1677/joe.0.1740095. PMID12098667.
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.
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.
Bisello A, Manen D, Pierroz DD, et al. (2004). "Agonist-specific regulation of parathyroid hormone (PTH) receptor type 2 activity: structural and functional analysis of PTH- and tuberoinfundibular peptide (TIP) 39-stimulated desensitization and internalization". Mol. Endocrinol. 18 (6): 1486–98. doi:10.1210/me.2003-0487. PMID14988434.