Present address: Physiologie cellulaire de la synapse, Unité mixte de Recherche 5091, Centre National de la Recherche Scientifique, Université Bordeaux II, Institut François Magendie, 146 rue Léo Saignat, 33077 Bordeaux cedex, France.
Heteromeric K+ channels in plants
Article first published online: 12 MAR 2008
© 2008 The Authors. Journal compilation © 2008 Blackwell Publishing Ltd
The Plant Journal
Volume 54, Issue 6, pages 1076–1082, June 2008
How to Cite
Lebaudy, A., Hosy, E., Simonneau, T., Sentenac, H., Thibaud, J.-B. and Dreyer, I. (2008), Heteromeric K+ channels in plants. The Plant Journal, 54: 1076–1082. doi: 10.1111/j.1365-313X.2008.03479.x
- Issue published online: 12 MAR 2008
- Article first published online: 12 MAR 2008
- Received 7 December 2007; revised 18 February 2008; accepted 26 February 2008; published online 8 May 2008.
- potassium channel;
Voltage-gated potassium channels of plants are multimeric proteins built of four α-subunits. In the model plant Arabidopsis thaliana, nine genes coding for K+ channel α-subunits have been identified. When co-expressed in heterologous expression systems, most of them display the ability to form heteromeric K+ channels. Till now it was not clear whether plants use this potential of heteromerization to increase the functional diversity of potassium channels. Here, we designed an experimental approach employing different transgenic plant lines that allowed us to prove the existence of heteromeric K+ channels in plants. The chosen strategy might also be useful for investigating the activity and function of other multimeric channel proteins like, for instance, cyclic-nucleotide gated channels, tandem-pore K+ channels and glutamate receptor channels.