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• W2581331564 abstract "Among opioids, morphinans are of major importance as the most effective analgesic drugs acting primarily via μ-opioid receptor (μ-OR) activation. Our long-standing efforts in the field of opioid analgesics from the class of morphinans led to N-methylmorphinan-6-ones differently substituted at positions 5 and 14 as μ-OR agonists inducing potent analgesia and fewer undesirable effects. Herein we present the first thorough molecular modeling study and structure–activity relationship (SAR) explorations aided by docking and molecular dynamics (MD) simulations of 14-oxygenated N-methylmorphinan-6-ones to gain insights into their mode of binding to the μ-OR and interaction mechanisms. The structure of activated μ-OR provides an essential model for how ligand/μ-OR binding is encoded within small chemical differences in otherwise structurally similar morphinans. We reveal important molecular interactions that these μ-agonists share and distinguish them. The molecular docking outcomes indicate the crucial role of the relative orientation of the ligand in the μ-OR binding site, influencing the propensity of critical non-covalent interactions that are required to facilitate ligand/μ-OR interactions and receptor activation. The MD simulations point out minor differences in the tendency to form hydrogen bonds by the 4,5α-epoxy group, along with the tendency to affect the 3–7 lock switch. The emerged SARs reveal the subtle interplay between the substituents at positions 5 and 14 in the morphinan scaffold by enabling the identification of key structural elements that determine the distinct pharmacological profiles. This study provides a significant structural basis for understanding ligand binding and μ-OR activation by the 14-oxygenated N-methylmorphinan-6-ones, which should be useful for guiding drug design." @default.
• W2581331564 created "2017-02-03" @default.
• W2581331564 creator A5005827647 @default.
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• W2581331564 date "2017-02-09" @default.
• W2581331564 modified "2023-10-18" @default.
• W2581331564 title "Molecular Docking, Molecular Dynamics, and Structure–Activity Relationship Explorations of 14-Oxygenated <i>N</i>-Methylmorphinan-6-ones as Potent μ-Opioid Receptor Agonists" @default.
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• W2581331564 doi "https://doi.org/10.1021/acschemneuro.6b00460" @default.
• W2581331564 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5481819" @default.
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• W2581331564 hasPublicationYear "2017" @default.
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