Journal
CURRENT OPINION IN PLANT BIOLOGY
Volume 14, Issue 5, Pages 489-497Publisher
CURRENT BIOLOGY LTD
DOI: 10.1016/j.pbi.2011.06.007
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Funding
- Netherlands Organization for Scientific Research (NWO) [VIDI 864.05.001]
- EU [FA0605]
- Department of Energy [DE-FG02-07ER15887]
- National Science Foundation [0937323]
- U.S. Department of Energy (DOE) [DE-FG02-07ER15887] Funding Source: U.S. Department of Energy (DOE)
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Plant genomes lack homologues of the inositol 1,4,5-trisphosphate receptor and protein kinase C, which are important components of the canonical phospholipase C signalling system in animals. Instead, plants seem to utilize alternative downstream signalling molecules, that is, InsP(6) and phosphatidic acid. Inositol lipids may also function as second messengers themselves. By reversible phosphorylation of the inositol headgroup, five biologically active plant polyphosphoinositides can be detected. Protein targets interact with specific polyphosphoinositide isomers via selective lipid-binding domains, thereby altering their intracellular localization and/or enzymatic activity. Such lipid-binding domains have also been used to create GFP based-lipid biosensors to visualize PPIs dynamics in vivo. Here, we highlight some recent advances and ideas on PPIs' role in plant signalling.
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