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Phosphotyrosine Profiling Using SILAC.

Keshava K Datta1, Aditi Chatterjee2, Harsha Gowda3,4,5

  • 1Department of Genetics and Computational Biology, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia.

Methods in Molecular Biology (Clifton, N.J.)
|November 12, 2022
PubMed
Summary
This summary is machine-generated.

This study details a protocol for phosphotyrosine profiling using stable isotope labeling with amino acids in cell culture (SILAC). This method enables quantitative comparison of tyrosine kinase signaling activity across multiple cell conditions.

Keywords:
KinasesMass spectrometryPhosphatasesPhosphopeptidesPhosphorylationProteomicsSILACTyrosine

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Proteomics

Background:

  • Tyrosine phosphorylation is a critical posttranslational modification regulating cellular processes.
  • Phosphotyrosine profiling using mass spectrometry reveals tyrosine kinase signaling.
  • Quantitative proteomics is essential for comparing signaling activity across conditions.

Purpose of the Study:

  • To provide a detailed protocol for phosphotyrosine profiling.
  • To demonstrate the application of stable isotope labeling with amino acids in cell culture (SILAC) for quantitative analysis.
  • To enable comparison of tyrosine kinase signaling activity across two to three different conditions.

Main Methods:

  • Utilizing mass spectrometry-based phosphotyrosine profiling.
  • Implementing quantitative proteomics strategies, specifically SILAC.
  • Describing required reagents and a step-by-step experimental protocol.

Main Results:

  • The protocol facilitates quantitative comparison of phosphotyrosine profiles.
  • SILAC enables robust analysis of tyrosine kinase signaling.
  • The method allows for differential analysis across experimental conditions.

Conclusions:

  • Phosphotyrosine profiling with SILAC is a powerful approach for studying tyrosine kinase signaling.
  • This protocol provides a reproducible method for quantitative proteomic analysis.
  • The technique is valuable for investigating cellular signaling in various biological contexts.