Distinct activation mechanisms underlie ligand efficacy at a GPCR
Marybeth Howard, Eve J. Fine, Karthik Srinivasan, Daniel D. Richman, Jerome Freudenberg, Zara Y. Weinberg, J. N. K. Rao, Ziyue Zou, Christian B. Macdonald, Patrick Rockefeller Grimes, Balázs R. Varga, James S. Fraser, Mark von Zastrow, Susruta Majumdar, Harold Pimentel, , Willow Coyote‐Maestas
This study uses deep mutational pharmacology to show how different residues in the -opioid receptor determine the efficacy of opioids by shaping distinct activation mechanisms.
bioRxiv · Oct 18, 2026 · PreprintBiophysics