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Related Experiment Video

Updated: Dec 25, 2025

Phosphoproteomic Strategy for Profiling Osmotic Stress Signaling in Arabidopsis
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Ionic liquid-assisted protein extraction method for plant phosphoproteome analysis.

Yang Li1, Fei Fang2, Mingwei Sun3

  • 1CAS Key Laboratory of Separation Science for Analytical Chemistry, National Chromatographic R. & A. Center, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian, Liaoning, 116023, China; University of Chinese Academy of Sciences, Beijing, 100039, China.

Talanta
|March 24, 2020
PubMed
Summary
This summary is machine-generated.

We developed a new method for efficient plant phosphoproteome analysis using ionic liquids for protein extraction and phosphopeptide enrichment. This approach significantly improves the identification of phosphorylation sites in plants like tobacco.

Keywords:
IL-RemovalIonic liquidsPlant phosphoproteomeProtein extractionTobacco leaves

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Area of Science:

  • Plant biology
  • Biochemistry
  • Proteomics

Background:

  • Protein phosphorylation is a crucial post-translational modification (PTM) in plants, regulating vital biological processes including virus resistance.
  • In-depth phosphoproteome profiling in plants is challenging due to difficult protein extraction and low phosphopeptide abundance, often requiring substantial plant material.
  • Existing methods face limitations in efficiency and scalability for comprehensive plant phosphoproteome analysis.

Purpose of the Study:

  • To develop an integrated and efficient strategy for plant phosphoproteome analysis.
  • To overcome the challenges associated with plant protein extraction and phosphopeptide enrichment.
  • To establish a robust method for large-scale phosphoproteomic studies in plants.

Main Methods:

  • An integrated sample preparation strategy combining ionic liquid (IL)-assisted protein extraction, in-solution digestion, and precipitation-assisted IL removal.
  • Utilized 1-dodecyl-3-methylimidazolium chloride (C12Im-Cl) as a solubilizer for enhanced protein extraction and enzyme compatibility.
  • Employed immobilized metal ion affinity chromatography (IMAC) for phosphopeptide enrichment and LC-MS analysis.

Main Results:

  • The C12Im-Cl method improved protein extraction from tobacco leaves by 1.9-fold compared to urea-assisted methods.
  • A novel precipitation strategy efficiently removed ILs, preventing interference with LC-MS analysis.
  • Identification of 14,441 unique phosphopeptides from 5153 unique phosphoproteins using 10 mg of tobacco leaf protein.

Conclusions:

  • The developed integrated strategy significantly enhances the efficiency and comprehensiveness of plant phosphoproteome analysis.
  • This method provides a robust platform for large-scale phosphoproteomic studies, advancing our understanding of plant signaling pathways.
  • The findings represent the most comprehensive phosphorylation dataset for tobacco to date, with broad potential for plant science research.