Title: The role of calmodulin for inositol 1,4,5-trisphosphate receptor function
Authors: Nadif Kasri, Nael ×
Bultynck, Geert
Sienaert, Ilse
Callewaert, Geert
Erneux, Christophe
Missiaen, Ludwig
Parys, Jan
De Smedt, Humbert #
Issue Date: Nov-2002
Publisher: Elsevier BV
Series Title: Biochimica et Biophysica Acta vol:1600 issue:1-2 pages:19-31
Abstract: Intracellular calcium release is a fundamental signaling mechanism in all eukaryotic cells. The ryanodine receptor (RyR) and inositol 1,4,5-trisphosphate receptor (IP(3)R) are intracellular calcium release channels. Both channels can be regulated by calcium and calmodulin (CaM). In this review we will first discuss the role of calcium as an activator and inactivator of the IP(3)R, concluding that calcium is the most important regulator of the IP(3)R. In the second part we will further focus on the role of CaM as modulator of the IP(3)R, using results of the voltage-dependent Ca(2+) channels and the RyR as reference material. Here we conclude that despite the fact that different CaM-binding sites have been characterized, their function for the IP(3)R remains elusive. In the third part we will discuss the possible functional role of CaM in IP(3)-induced Ca(2+) release (IICR) by direct and indirect mechanisms. Special attention will be given to the Ca(2+)-binding proteins (CaBPs) that were shown to activate the IP(3)R in the absence of IP(3).
ISSN: 0006-3002
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physiology Section (-)
Laboratory of Molecular and Cellular Signaling
× corresponding author
# (joint) last author

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