Sugar-induced endocytosis of plant 7TM-RGS proteins

Plant cells use sugars mainly as a source or store of energy and carbon skeletons for anabolic reactions and for osmotic regulation. The perception of sugars and their responses are rather complex including the heterotrimeric G protein pathway and a seven-transmembrane RGS molecule. Previously, we f...

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Bibliographic Details
Published inPlant Signaling & Behavior Vol. 8; no. 2
Main Authors Phan, Nguyen, Urano, Daisuke, Srba, Miroslav, Fischer, Lukas, Jones, Alan M.
Format Report
LanguageEnglish
Published Taylor & Francis 01.02.2013
Subjects
7TM-RGS
Arabidopsis thaliana
endocytosis
Pinus taeda
sugar signaling
tobacco
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Summary:Plant cells use sugars mainly as a source or store of energy and carbon skeletons for anabolic reactions and for osmotic regulation. The perception of sugars and their responses are rather complex including the heterotrimeric G protein pathway and a seven-transmembrane RGS molecule. Previously, we found that endocytosis of the 7TM-RGS leads to sustained activation of the G protein pathway in the genetic model Arabidopsis. Here we show that other plants possess similar endocytosis systems of the 7TM-RGS proteins. A phosphorylation site essential for the endocytosis is well conserved in land plant 7TM-RGS proteins. In addition, conifer and tobacco 7TM-RGS proteins are internalized in response to sugar. These results indicate a universal mechanism to activate G signaling by endocytosis in plant cells that have 7TM-RGS proteins.
ISSN:1559-2324
DOI:10.4161/psb.22814