Structural elucidation of Leuprolide and its analogues in solution: insight into their bioactive conformation |
| |
Authors: | Despina K Laimou Maria Katsara Minos-Timotheos I Matsoukas Vasso Apostolopoulos Anastassios N Troganis Theodore V Tselios |
| |
Institution: | (1) Department of Chemistry, University of Patras, Patras, 26500, Greece;(2) Immunology and Vaccine Laboratory, Burnet Institute (Austin Campus), Studley Road, Heidelberg, Victoria, 3084, Australia;(3) Department of Biological Applications and Technologies, University of Ioannina, Ioannina, 45110, Greece; |
| |
Abstract: | Leuprolide dLeu6, NHEt10]GnRH, a potent gonadotropin-releasing hormone (GnRH) agonist, is used in a wide variety of hormone-related diseases like
cancer and endometriosis. In this report, the conformational behaviour of Leuprolide and its linear synthetic analogues, namely
Tyr5(OMe), dLeu6, Aze9, NHEt10]GnRH (1) and Tyr5(OMe), dLeu6, NHEt10]GnRH (2) have been studied in DMSO and H2O solutions by means of 2D nuclear magnetic resonance (NMR) experiments and detailed molecular dynamics (MD) simulations.
The aim was to identify the conformational requirements of GnRH analogues for agonistic activity. This approach is of value
as no crystallographic data are available for the GnRH receptor (G protein-coupled receptor, GPCR). The NOE data indicate
the existence of a β-turn type I in the 2–5 segments of Leuprolide and its linear analogues in the case of using DMSO-d6 as solvent, whereas a β-turn type II in the 3–6 segments is indicated using D2O as solvent. The final structures fulfil the conformational requirements that are known, in the literature, to play a significant
role in receptor recognition and activation. Finally, the linear analogues (1) and (2) are biologically active when tested against the human breast cancer cell line, MCF-7. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|