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JXB Advance Access published online on December 5, 2006
Journal of Experimental Botany, doi:10.1093/jxb/erl220
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© The Author [2006]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

REVIEW ARTICLE

Inositol trisphosphate receptor in higher plants: is it real?

Ondrej Krinke1,3, Zuzana Novotná1, Olga Valentová1 and Jan Martinec2,*

1Department of Biochemistry and Microbiology, Institute of Chemical Technology Prague, Technická 3, 166 28 Prague 6, Czech Republic
2Institute of Experimental Botany, The Academy of Sciences of the Czech Republic, Rozvojová 135, 165 02 Prague 6, Czech Republic
3Université Pierre et Marie Curie-Paris 6 and Centre National de la Recherche Scientifique, Formation de Recherche en Evolution 2846, Laboratoire de Physiologie Cellulaire et Moléculaire des Plantes, Ivry-sur-Seine, F-94200 France

* To whom correspondence should be addressed. E-mail: martinec{at}ueb.cas.cz

The receptor for D-myo-inositol 1,4,5-trisphosphate (InsP3-R) has been well documented in animal cells. It constitutes an important component of the intracellular calcium signalling system. Today the corresponding genes in many species have been sequenced and the antibodies against some of the InsP3-Rs are available. In contrast, very little is known about its plant counterpart. Only a few published works have dealt directly with this topic. This review summarizes the available relevant data and determines some properties of putative plant receptor(s) including the in silico search for its gene in plant genomes, in vivo evidence, its electrophysiology, the parameters of InsP3-induced calcium release and InsP3 binding, immunological cross-reactivity, and subcellular localization. Future progress in this area seems to be inevitable as, despite the efforts, its gene in plants has not been identified yet.

Key words: Ca2+ signalling, higher plants, inositol trisphosphate receptor, ligand-gated Ca2+ channels


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