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Related Experiment Video

Updated: May 24, 2025

Yeast Luminometric and Xenopus Oocyte Electrophysiological Examinations of the Molecular Mechanosensitivity of TRPV4

Yeast Luminometric and Xenopus Oocyte Electrophysiological Examinations of the Molecular Mechanosensitivity of TRPV4

Published on: December 31, 2013

Thermoring basis for thermo-gated TRPV2.

Research Square

|March 4, 2025

Summary

Lipids are crucial for thermosensitive TRPV channel heat responses. Releasing specific lipids from the vanilloid and voltage sensor domains explains the use-dependent heat activation of TRPV channels.

Area of Science:

Molecular Biology
Biophysics
Ion Channel Research

Background:

Thermosensitive transient receptor potential vanilloid (TRPV) channels (TRPV1-4) exhibit use-dependent heat responses, where initial heat stimuli alter subsequent temperature thresholds and sensitivity.
While lipid release is known to be necessary for TRPV1 and TRPV3 activation, the specific structural mechanisms for other TRPV channels remain largely uncharacterized.

Purpose of the Study:

To investigate the role of lipids in the use-dependent heat activation of thermosensitive TRPV channels, particularly TRPV2.
To elucidate the structural basis for altered temperature thresholds and thermosensitivity after initial heat exposure.

Main Methods:

Analysis of 3D cryo-electron microscopy (cryo-EM) structures of apo rat TRPV2 in various gating states, with and without lipids.

Keywords:

Cooperative unfolding gating noncovalent interaction protein stability protein-lipid interaction thermodynamic signature thermoring structure

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Last Updated: May 24, 2025

Yeast Luminometric and Xenopus Oocyte Electrophysiological Examinations of the Molecular Mechanosensitivity of TRPV4

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Published on: December 31, 2013

Purification and Reconstitution of TRPV1 for Spectroscopic Analysis

Purification and Reconstitution of TRPV1 for Spectroscopic Analysis

Published on: July 3, 2018

A Simple and Inexpensive Method for Determining Cold Sensitivity and Adaptation in Mice

A Simple and Inexpensive Method for Determining Cold Sensitivity and Adaptation in Mice

Published on: March 17, 2015

Utilized a highly sensitive thermoring model to assess heat activation properties.

Main Results:

The study identified the necessity of releasing two specific lipids—one from the voltage sensor-like domain and another from the vanilloid site—for heat activation.
These lipid releases were found to be critical for matching theoretical and experimental start and end thresholds and thermosensitivities during sequential heat stimuli.

Conclusions:

This research elucidates the significant role of lipids at distinct molecular sites in mediating the use-dependent heat responses of thermosensitive TRPV1-4 channels.
The findings provide a deeper structural understanding of how TRPV channels adapt their thermal sensitivity based on prior activation history.