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Related Experiment Video

Updated: Jul 17, 2026

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

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TRPM3.

J Oberwinkler¹, S E Phillipp

¹Institut für klinische und experimentelle Pharmakologie und Toxikologie der Universität des Saarlandes, 66421 Homburg, Germany. johannes.oberwinkler@uniklinikum-saarland.de

Handbook of Experimental Pharmacology

|January 16, 2007

Summary

Transient Receptor Potential Melastatin 3 (TRPM3) exhibits numerous variants due to alternative splicing. This review overviews TRPM3 variants and their distinct functional properties, particularly concerning ion selectivity.

Area of Science:

Molecular biology
Ion channel research
Genetics

Background:

Transient Receptor Potential Melastatin 3 (TRPM3) is the latest identified member of the TRPM channel subfamily.
TRPM3 is closely related to TRPM1.
Alternative splicing of the TRPM3 gene leads to a diverse array of channel variants.

Purpose of the Study:

To provide a comprehensive overview of the known TRPM3 variants.
To compare the functional properties of different TRPM3 splice variants.
To highlight how alternative splicing impacts TRPM3 channel function, especially ion selectivity.

Main Methods:

Literature review of studies on TRPM3 variants.
Comparative analysis of reported functional data for TRPM3 channels.

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Examination of splice variants affecting the pore-forming region.

Main Results:

The TRPM3 gene generates a significant number of splice variants.
A specific splice event in the pore-forming region alters divalent cation selectivity.
Functional properties vary considerably among identified TRPM3 variants.

Conclusions:

Alternative splicing is a key mechanism generating functional diversity in TRPM3 channels.
Understanding TRPM3 variants is crucial for elucidating their physiological roles.
The differential ion selectivity of TRPM3 variants suggests specialized functions.