Activation of a plant plasma membrane Ca2+ channel by TGα1, a heterotrimeric G protein α‐subunit homologue

FEBS Letters

Blumwald, Eduardo¹  Snedden, Wayne A¹  Aharon, Gilad S¹  Gelli, Angie¹ 

[1] Department of Botany, University of Toronto. 25 Willcocks St., Toronto, Ont. M5S 3B2, Canada

关键词: Heterotrimeric G protein;    Plasma membrane Ca2+ channel;    TGα1;    Signal transduction;   

DOI  :  10.1016/S0014-5793(98)00129-X

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Wild-type and GTPase-deficient recombinant TGα1 were used along patch-clamp techniques to study the role of heterotrimeric G proteins in the regulation of the hyperpolarized active tomato plasma membrane Ca²⁺ channel. Recombinant α-subunits induced an increase in channel activity as shown by the increase in channel events and the mean open probability of the channel. Our results suggest a membrane-delimited pathway involving heterotrimeric G proteins in Ca²⁺ channel activation.

【 授权许可】

Unknown