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Comprehensive Workflow of Mass Spectrometry-based Shotgun Proteomics of Tissue Samples
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Optimizing the SWATH-MS-workflow for label-free proteomics.

Johann M B Simbürger1, Katja Dettmer1, Peter J Oefner1

  • 1Institute of Functional Genomics, University of Regensburg, Germany.

Journal of Proteomics
|April 25, 2016
PubMed
Summary
This summary is machine-generated.

This study enhances protein quantification using Sequential Window Acquisition of all Theoretical fragment-ion spectra (SWATH) mass spectrometry. Optimized methods improve precision and detect more regulated proteins in complex samples.

Keywords:
Label free quantificationMass spectrometrySWATH

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Area of Science:

  • Proteomics
  • Analytical Chemistry
  • Biochemistry

Background:

  • Protein quantification is crucial in contemporary proteomics.
  • Mass spectrometry, specifically SWATH-MS, offers label-free quantification of thousands of proteins in complex samples.

Purpose of the Study:

  • To optimize mass spectrometry detection parameters for SWATH-MS.
  • To enhance the protein library size and improve quantification precision.
  • To reduce systematic errors and improve differential analysis for detecting regulated proteins.

Main Methods:

  • Optimization of mass spectrometrical detection parameters for SWATH-MS.
  • Implementation of label-free quantification strategies.
  • Enhanced differential analysis for protein regulation detection.

Main Results:

  • Increased protein library size and enhanced precision in protein quantifications.
  • Reduced systematic errors caused by fragment ion interference.
  • Improved detection of significantly regulated proteins with a dynamic range exceeding three orders of magnitude.

Conclusions:

  • Optimized SWATH-MS parameters significantly enhance protein quantification capabilities.
  • The improved method facilitates more precise and comprehensive proteomic analyses.
  • This advancement aids in the discovery of subtle yet significant protein expression changes in complex biological systems.