- Pumroy, Ruth A;
- Protopopova, Anna D;
- Fricke, Tabea C;
- Lange, Iris U;
- Haug, Ferdinand M;
- Nguyen, Phuong T;
- Gallo, Pamela N;
- Sousa, Bárbara B;
- Bernardes, Gonçalo JL;
- Yarov-Yarovoy, Vladimir;
- Leffler, Andreas;
- Moiseenkova-Bell, Vera Y
Transient receptor potential vanilloid 2 (TRPV2) is involved in many critical physiological and pathophysiological processes, making it a promising drug target. Here we present cryo-electron microscopy (cryo-EM) structures of rat TRPV2 in lipid nanodiscs activated by 2-aminoethoxydiphenyl borate (2-APB) and propose a TRPV2-specific 2-ABP binding site at the interface of S5 of one monomer and the S4-S5 linker of the adjacent monomer. In silico docking and electrophysiological studies confirm the key role of His521 and Arg539 in 2-APB activation of TRPV2. Additionally, electrophysiological experiments show that the combination of 2-APB and cannabidiol has a synergetic effect on TRPV2 activation, and cryo-EM structures demonstrate that both drugs were able to bind simultaneously. Together, our cryo-EM structures represent multiple functional states of the channel, providing a native picture of TRPV2 activation by small molecules and a structural framework for the development of TRPV2-specific activators.