Free-Flow Electrophoresis of Plasma Membrane Vesicles Enriched by Two-Phase Partitioning Enhances the Quality of the Proteome from Arabidopsis Seedlings

Journal of Proteome Research
Roberto de MicheleJoshua L Heazlewood

Abstract

The plant plasma membrane is the interface between the cell and its environment undertaking a range of important functions related to transport, signaling, cell wall biosynthesis, and secretion. Multiple proteomic studies have attempted to capture the diversity of proteins in the plasma membrane using biochemical fractionation techniques. In this study, two-phase partitioning was combined with free-flow electrophoresis to produce a population of highly purified plasma membrane vesicles that were subsequently characterized by tandem mass spectroscopy. This combined high-quality plasma membrane isolation technique produced a reproducible proteomic library of over 1000 proteins with an extended dynamic range including plasma membrane-associated proteins. The approach enabled the detection of a number of putative plasma membrane proteins not previously identified by other studies, including peripheral membrane proteins. Utilizing multiple data sources, we developed a PM-confidence score to provide a value indicating association to the plasma membrane. This study highlights over 700 proteins that, while seemingly abundant at the plasma membrane, are mostly unstudied. To validate this data set, we selected 14 candidates and transient...Continue Reading

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Citations

Apr 26, 2017·Journal of Proteomics·Tomáš TakáčJozef Šamaj
Jan 26, 2018·Proteomics·Angelo Schuabb HeringerVanildo Silveira
Jan 20, 2019·The Plant Journal : for Cell and Molecular Biology·Jiyoung ParkJulian I Schroeder
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Jan 20, 2021·Journal of Experimental Botany·Javier Martínez PachecoJosé M Estevez

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