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Navigating the Mass Spectrometry-Based Proteomic Data Using Free Computational Tools
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Web-Based Search Tool for Visualizing Instrument Performance Using the Triple Knockout (TKO) Proteome Standard.

Jeremy P Gygi1, Qing Yu1, Jose Navarrete-Perea1

  • 1Department of Cell Biology , Harvard Medical School , Boston , Massachusetts 02115 , United States.

Journal of Proteome Research
|November 20, 2018
PubMed
Summary
This summary is machine-generated.

A new TKO Visualization Tool (TVT) automates analysis of the triple knockout (TKO) standard for proteomics. This enables optimized data collection strategies and minimizes interference in mass spectrometry experiments.

Keywords:
SPS-MS3TKO standardTMTTVTiTRAQion interferenceshiny application

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Area of Science:

  • Proteomics
  • Mass Spectrometry
  • Analytical Chemistry

Background:

  • Multiplexing strategies, particularly synchronous precursor selection MS3 (SPS-MS3), are crucial in mass-spectrometry-based proteomics.
  • A significant challenge in isobaric multiplexing is ion interference from coisolated and cofragmented ions.
  • The triple knockout (TKO) standard was developed to assess data collection strategies for minimizing interference, but lacks automated analysis.

Purpose of the Study:

  • To introduce an automated, web-based analysis platform for the TKO standard, named the TKO Visualization Tool (TVT).
  • To enable efficient benchmarking of mass spectrometry data collection strategies and optimization of proteomics workflows.

Main Methods:

  • Development of the TKO Visualization Tool (TVT) for automated, web-based database searching of the TKO standard.
  • Integration of traditional figures of merit (peptide/protein counts, ion accumulation times) and the interference-free index (IFI).
  • Implementation of comparative plotting of two TKO standards for protocol optimization and instrument performance assessment.

Main Results:

  • The TVT provides automated analysis of TKO standards, yielding key performance metrics including the IFI.
  • Demonstrated use of TVT to probe the impact of stationary phase resin, MS2 isolation window width, and SPS ion number on SPS-MS3 analysis.
  • Enabled comparison of TKO results to optimize specific data collection parameters.

Conclusions:

  • The TKO Visualization Tool (TVT) addresses the need for automated analysis of the TKO standard in proteomics.
  • TVT facilitates the optimization of mass spectrometry data collection workflows by providing standardized benchmarking and comparative analysis.
  • Widespread adoption of TVT will enhance the reliability and efficiency of interference assessment in multiplexed quantitative proteomics.