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Updated: Nov 5, 2025

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Transient receptor potential ankyrin 1 channel: An evolutionarily tuned thermosensor.

V Sinica1, V Vlachová

  • 1Laboratory of Cellular Neurophysiology, Institute of Physiology of the Czech Academy of Sciences, Prague 4, Czech Republic. viktor.sinica@img.cas.cz or Viktorie.Vlachova@fgu.cas.cz.

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The transient receptor potential ankyrin 1 (TRPA1) channel detects cold and pain. Recent cryo-EM advances reveal its temperature-sensing mechanisms and potential drug targets, advancing our understanding of TRPA1

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Biophysics

Background:

  • The transient receptor potential ankyrin 1 (TRPA1) channel is a key sensor for cold and noxious stimuli.
  • TRPA1 orthologues are found across species, highlighting its evolutionary significance in physiological functions.
  • Understanding TRPA1's temperature-sensing machinery has been limited until recent structural biology advancements.

Purpose of the Study:

  • To review recent knowledge on the molecular mechanisms of TRPA1 temperature sensitivity.
  • To explore how structural insights from cryo-electron microscopy (cryo-EM) can inform drug targeting and lipid regulation of TRPA1.
  • To identify critical domains in TRPA1 activation by comparing human and mouse orthologues' sensitivities.

Main Methods:

  • Review of current scientific literature on TRPA1.
  • Analysis of findings from single-particle cryo-electron microscopy (cryo-EM) studies.
  • Comparative analysis of temperature and chemical sensitivity between human and mouse TRPA1 orthologues.

Main Results:

  • Cryo-EM is providing unprecedented structural detail on thermosensitive ion channel operation.
  • TRPA1's molecular structure shows evolutionary flexibility, impacting its diverse physiological roles.
  • Comparative sensitivity analysis aids in pinpointing key domains for TRPA1 activation.

Conclusions:

  • Advances in cryo-EM are revolutionizing the study of TRPA1, enabling detailed investigation of its structure and function.
  • Understanding TRPA1's molecular mechanisms opens new avenues for pharmacological targeting and therapeutic development.
  • Comparing TRPA1 orthologues is a valuable strategy for dissecting channel activation and identifying functional domains.