Download MendeleySymmetry transitions during gating of the TRPV2 ion channel in lipid membranes.
Zubcevic, L., Hsu, A.L., Borgnia, M.J., Lee, S.Y.(2019) Elife 8
- PubMed: 31090543
- DOI: https://doi.org/10.7554/eLife.45779
- Primary Citation of Related Structures:
6OO3, 6OO4, 6OO5, 6OO7 - PubMed Abstract:
The Transient Receptor Potential Vanilloid 2 (TRPV2) channel is a member of the temperature-sensing thermoTRPV family. Recent advances in cryo-electronmicroscopy (cryo-EM) and X-ray crystallography have provided many important insights into the gating mechanisms of thermoTRPV channels. Interestingly, crystallographic studies of ligand-dependent TRPV2 gating have shown that the TRPV2 channel adopts two-fold symmetric arrangements during the gating cycle. However, it was unclear if crystal packing forces played a role in stabilizing the two-fold symmetric arrangement of the channel. Here, we employ cryo-EM to elucidate the structure of full-length rabbit TRPV2 in complex with the agonist resiniferatoxin (RTx) in nanodiscs and amphipol. We show that RTx induces two-fold symmetric conformations of TRPV2 in both environments. However, the two-fold symmetry is more pronounced in the native-like lipid environment of the nanodiscs. Our data offers insights into a gating pathway in TRPV2 involving symmetry transitions.
Organizational Affiliation:
Department of Biochemistry, Duke University School of Medicine, Durham, United States.
