Regulation of TRP channels: A voltage-lipid connection

B. Nilius, F. Mahieu, Y. Karashima, T. Voets

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

TRP (transient receptor potential) channels respond to a plethora of stimuli in a fine-tuned manner. We show here that both membrane potential and the level of PI (phosphatidylinositol) phosphates are efficient regulators of TRP channel gating. Recent work has shown that this regulation applies to several members of the TRPV (TRP vanilloid) subfamily (TRPV1 and TRPV5) and the TRPM (TRP melastatin) subfamily (TRPM4/ TRPM5/TRPM7/TRPM8), whereas regulation of members of the TRPC subfamily is still disputed. The mechanism whereby PIP2 (PI 4,5-bisphosphate) acts on TRPM4, a Ca2+- and voltage-activated channel, is shown in detail in this paper: (i) PIP2 may bind directly to the channel, (ii) PIP2 induces sensitization to activation by Ca2+, and (iii) PIP2 shifts the voltage dependence towards negative and physiologically more meaningful potentials. A PIP2-binding pocket seems to comprise a part of the TRP domain and especially pleckstrin homology domains in the C-terminus.

Original languageEnglish
Pages (from-to)105-108
Number of pages4
JournalBiochemical Society Transactions
Volume35
Issue number1
DOIs
Publication statusPublished - Feb 1 2007
Externally publishedYes

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Biochemistry

Cite this