Recent Molecular Insights into Agonist-specific Binding to the Mu-Opioid Receptor

Zádor, Ferenc and Király, Kornél P. and Essmat, N. and Al-Khrasani, Mahmoud (2022) Recent Molecular Insights into Agonist-specific Binding to the Mu-Opioid Receptor. FRONTIERS IN MOLECULAR BIOSCIENCES, 9. No.-900547. ISSN 2296-889X

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Abstract

Opioid agonists produce their analgesic effects primarily by acting at the µ-opioid receptor (µOR). µOR agonists with different efficacies exert diverse molecular changes in the µOR which dictate the faith of the receptor’s signaling pathway and possibly it’s the degree of desensitization. Since the development of the active conformations of the µOR, growing data have been published in relation to ligand-specific changes in µOR activation. In this regard, this review summarizes recent data regarding the most studied opioid agonists in in silico µOR activation, including how these ligands are recognized by the µOR, how their binding signal is transmitted toward the intracellular parts of the µOR, and finally, what type of large-scale movements do these changes trigger in the µOR’s domains.

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