Related Experiment Video

Updated: May 10, 2026

Yeast Luminometric and Xenopus Oocyte Electrophysiological Examinations of the Molecular Mechanosensitivity of TRPV4
12:09

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

Published on: December 31, 2013

The Xenopus TRPV6 homolog encodes a Mg(2+) -permeant channel that is inhibited by interaction with TRPC1

Raphael Courjaret1, Satanay Hubrack, Arwa Daalis

  • 1Department of Physiology and Biophysics, Weill Cornell Medical College in Qatar, Education City, Qatar Foundation, Doha, Qatar.

Journal of Cellular Physiology
|June 5, 2013
PubMed

Insights

Transient Receptor Potential Vanilloid 6 (TRPV6) channels are crucial for calcium uptake. In Xenopus oocytes, TRPC1 interaction inhibits TRPV6 activity, suggesting TRPC1 regulates TRPV6 in physiological conditions.

Area of Science:

  • Cell Biology
  • Ion Channel Physiology
  • Molecular Biology

Background:

  • The Transient Receptor Potential (TRP) gene family encodes cation channels involved in sensory mechanisms.
  • TRPV5 and TRPV6 are highly calcium-selective channels crucial for epithelial calcium uptake.
  • Mechanisms regulating TRPV5/6 activation in native tissues remain largely unknown.

Purpose of the Study:

  • To functionally characterize the Xenopus TRPV6 homolog (xTRPV6).
  • To investigate the regulation of xTRPV6 activity in Xenopus oocytes.
  • To identify potential interacting partners that modulate xTRPV6 function.

Main Methods:

  • Functional characterization of xTRPV6 in Xenopus oocytes.
  • Electrophysiological recordings to measure ion channel currents.
  • Co-immunoprecipitation assays to assess protein interactions.

Main Results:

  • xTRPV6 is expressed in oocytes and is permeable to calcium and magnesium.
  • A resting TRPV6-like current is absent in oocytes, indicating an inactive endogenous state.
  • Endogenous and overexpressed xTRPV6 interact with xTRPC1, inhibiting xTRPV6 currents.

Conclusions:

  • TRPC1 interacts with and inhibits xTRPV6 activity.
  • TRPC1 likely plays a physiological role in regulating TRPV6 channel activity.
  • This study elucidates a novel regulatory mechanism for TRPV6 channels.

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