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Title: Vanilloid-dependent TRPV1 opening trajectory from cryoEM ensemble analysis

Journal Article · · Nature Communications

Single particle cryo-EM often yields multiple protein conformations within a single dataset, but experimentally deducing the temporal relationship of these conformers within a conformational trajectory is not trivial. Here, we use thermal titration methods and cryo-EM in an attempt to obtain temporal resolution of the conformational trajectory of the vanilloid receptor TRPV1 with resiniferatoxin (RTx) bound. Based on our cryo-EM ensemble analysis, RTx binding to TRPV1 appears to induce intracellular gate opening first, followed by selectivity filter dilation, then pore loop rearrangement to reach the final open state. This apparent conformational wave likely arises from the concerted, stepwise, additive structural changes of TRPV1 over many subdomains. Greater understanding of the RTx-mediated long-range allostery of TRPV1 could help further the therapeutic potential of RTx, which is a promising drug candidate for pain relief associated with advanced cancer or knee arthritis.

Research Organization:
Duke University, Durham, NC (United States). School of Medicine
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Institutes of Health (NIH); National Science Foundation (NSF)
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1903933
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 13; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

References (48)

Uncoupling Proton Activation of Vanilloid Receptor TRPV1 journal November 2007
Structural Titration of Slo2.2, a Na + -Dependent K + Channel journal January 2017
PHENIX: a comprehensive Python-based system for macromolecular structure solution journal January 2010
Light-coupled cryo-plunger for time-resolved cryo-EM journal December 2020
Design of a High-Affinity Competitive Antagonist of the Vanilloid Receptor Selective for the Calcium Entry-Linked Receptor Population journal January 2004
Visualizing density maps with UCSF Chimera journal January 2007
The role of π-helices in TRP channel gating journal October 2019
Propagating conformational changes over long (and short) distances in proteins journal August 2001
GPCR Signaling Rides a Wave of Conformational Changes journal October 2016
TRPV1 structures in distinct conformations reveal activation mechanisms journal December 2013
MolProbity : all-atom structure validation for macromolecular crystallography journal December 2009
Conformational plasticity in the selectivity filter of the TRPV2 ion channel journal April 2018
A Yeast Genetic Screen Reveals a Critical Role for the Pore Helix Domain in TRP Channel Gating journal May 2008
Screening and large-scale expression of membrane proteins in mammalian cells for structural studies journal October 2014
The activation mechanism of rat vanilloid receptor 1 by capsaicin involves the pore domain and differs from the activation by either acid or heat journal November 2000
Software tools for automated transmission electron microscopy journal May 2019
Capsaicin Activation of the Pain Receptor, VR1: Multiple Open States from Both Partial and Full Binding journal May 2003
Deep classification of a large cryo-EM dataset defines the conformational landscape of the 26S proteasome journal March 2014
Structural determinants of gating in the TRPV1 channel journal June 2009
New tools for automated high-resolution cryo-EM structure determination in RELION-3 journal November 2018
Structural insights into the mechanism of activation of the TRPV1 channel by a membrane-bound tarantula toxin journal February 2016
TRPV1 structures in nanodiscs reveal mechanisms of ligand and lipid action journal May 2016
Ribosome dynamics and tRNA movement by time-resolved electron cryomicroscopy journal July 2010
TRPV1 pore turret dictates distinct DkTx and capsaicin gating journal November 2018
Temperature-induced opening of TRPV1 ion channel is stabilized by the pore domain journal April 2010
Structural snapshots of TRPV1 reveal mechanism of polymodal functionality journal September 2021
Time-resolved cryo-EM using Spotiton journal August 2020
Evolutionarily conserved networks of residues mediate allosteric communication in proteins journal December 2002
Reconstitution of Membrane Proteins in Phospholipid Bilayer Nanodiscs book January 2009
A heuristic derived from analysis of the ion channel structural proteome permits the rapid identification of hydrophobic gates journal June 2019
Coot model-building tools for molecular graphics journal November 2004
The conformational wave in capsaicin activation of transient receptor potential vanilloid 1 ion channel journal July 2018
Structure of the TRPV1 ion channel determined by electron cryo-microscopy journal December 2013
On the nature of allosteric transitions: A plausible model journal May 1965
Frameworks for Understanding Long-Range Intra-Protein Communication journal April 2009
Mapping the conformational wave of acetylcholine receptor channel gating journal February 2000
An external sodium ion binding site controls allosteric gating in TRPV1 channels journal February 2016
Cryo-EM studies of the structure and dynamics of vacuolar-type ATPases journal July 2016
Gctf: Real-time CTF determination and correction journal January 2016
Cryo-EM: A Unique Tool for the Visualization of Macromolecular Complexity journal May 2015
Activation of transient receptor potential vanilloid 1 (TRPV1) by resiniferatoxin: Activation of TRPV1 by resiniferatoxin journal September 2005
Contribution of the Putative Inner-Pore Region to the Gating of the Transient Receptor Potential Vanilloid Subtype 1 Channel (TRPV1) journal July 2007
Acid potentiation of the capsaicin receptor determined by a key extracellular site journal June 2000
The Vanilloid Receptor: A Molecular Gateway to the Pain Pathway journal March 2001
TRP channels in cancer pain journal August 2021
MotionCor2: anisotropic correction of beam-induced motion for improved cryo-electron microscopy journal February 2017
Two promising future developments of cryo-EM: capturing short-lived states and mapping a continuum of states of a macromolecule journal October 2015
Heat-dependent opening of TRPV1 in the presence of capsaicin journal July 2021