Download MendeleyMolecular mechanism of TRPV2 channel modulation by cannabidiol.
Pumroy, R.A., Samanta, A., Liu, Y., Hughes, T.E., Zhao, S., Yudin, Y., Rohacs, T., Han, S., Moiseenkova-Bell, V.Y.(2019) Elife 8
- PubMed: 31566564
- DOI: https://doi.org/10.7554/eLife.48792
- Primary Citation of Related Structures:
6U84, 6U86, 6U88, 6U8A - PubMed Abstract:
Transient receptor potential vanilloid 2 (TRPV2) plays a critical role in neuronal development, cardiac function, immunity, and cancer. Cannabidiol (CBD), the non-psychotropic therapeutically active ingredient of Cannabis sativa , is an activator of TRPV2 and also modulates other transient receptor potential (TRP) channels. Here, we determined structures of the full-length rat TRPV2 channel in apo and CBD-bound states in nanodiscs by cryo-electron microscopy. We show that CBD interacts with TRPV2 through a hydrophobic pocket located between S5 and S6 helices of adjacent subunits, which differs from known ligand and lipid binding sites in other TRP channels. CBD-bound TRPV2 structures revealed that the S4-S5 linker plays a critical role in channel gating upon CBD binding. Additionally, nanodiscs permitted us to visualize two distinct TRPV2 apo states in a lipid environment. Together these results provide a foundation to further understand TRPV channel gating, their divergent physiological functions, and to accelerate structure-based drug design.
Organizational Affiliation:
Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, United States.
