Abstract
Detection of polyphosphoinositides (PPIs) is difficult due to their low chemical abundancy. This problem is further complicated by the fact that PPIs are present as various, distinct isomers, which are difficult, if not impossible, to separate by conventional thin layer chromatography (TLC) systems. PPIs in plants include PtdIns3P, PtdIns4P, PtdIns5P, PtdIns(3,5)P 2, and PtdIns(4,5)P 2. Here, a protocol is described analyzing plant PPIs using 32P-orthophosphorus pre-labeled material. After extraction, lipids are deacylated and the resulting glycerophosphoinositol polyphosphates (GroPInsPs) separated by HPLC using a strong anion-exchange column and a shallow salt gradient. Alternatively, PPIs are first separated by TLC, the lipids reisolated, deacylated, and the GroPInsPs then separated by HPLC.
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Munnik, T. (2013). Analysis of D3-,4-,5-Phosphorylated Phosphoinositides Using HPLC. In: Munnik, T., Heilmann, I. (eds) Plant Lipid Signaling Protocols. Methods in Molecular Biology, vol 1009. Humana, Totowa, NJ. https://doi.org/10.1007/978-1-62703-401-2_2
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DOI: https://doi.org/10.1007/978-1-62703-401-2_2
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