Design and synthesis of an opioid receptor probe: Mode of binding of S-activated (-)-6.BETA.-sulfhydryldihydromorphine with the SH group in the .MU.-opioid receptor.
Design and synthesis of an opioid receptor probe: Mode of binding of S-activated (-)-6.BETA.-sulfhydryldihydromorphine with the SH group in the .MU.-opioid receptor.
For three-dimensional understanding of the mechanisms that control potency and selectivity of the ligand binding at the atomic level, we have analysed opioid receptor-ligand interaction based on the receptor's 3D model. As a first step, we have constructed molecular models for the multiple opioid receptor subtypes using bacteriorhodopsin as a template. The S-activated dihydromorphine derivatives should serve as powerful tools in mapping the three-dimensional structure of the mu opioid receptor, including the nature of the agonist-mediated conformational change that permits G protein-coupling to 'second messenger' effector molecules, and in identifying specific ligand-binding contacts with the mu opioid receptor. The analyses of the interactions of some opioid ligands with the predicted ligand binding sites are consistent with the results of the affinity labeling experiments. Copyright (C) 1996 Elsevier Science Ltd
Design and synthesis of an opioid receptor probe: Mode of binding of S-activated (-)-6.BETA.-sulfhydryldihydromorphine with the SH group in the .MU.-opioid receptor.