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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Published in | Plant Signaling & Behavior Vol. 8; no. 2 |
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Main Authors | , , , , |
Format | Report |
Language | English |
Published |
Taylor & Francis
01.02.2013
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Subjects | |
Online Access | Get full text |
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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. |
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ISSN: | 1559-2324 |
DOI: | 10.4161/psb.22814 |