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Related Experiment Videos

Targeted proteomic quantification on quadrupole-orbitrap mass spectrometer.

Sebastien Gallien1, Elodie Duriez, Catharina Crone

  • 1Luxembourg Clinical Proteomics Center (LCP), CRP-Santé, L-1445 Strassen, Luxembourg.

Molecular & Cellular Proteomics : MCP
|September 11, 2012
PubMed
Summary
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New quadrupole-orbitrap mass spectrometry offers precise, high-throughput peptide quantification. This advanced technique improves selectivity and sensitivity for complex biological samples, advancing systems biology and biomarker discovery.

Area of Science:

  • Proteomics and Mass Spectrometry
  • Biomarker Discovery
  • Systems Biology

Background:

  • Current protein quantification methods using triple quadrupole instruments in selected reaction monitoring (SRM) face limitations in the number of peptides analyzed and selectivity.
  • There is a critical need for enhanced precision and throughput in quantifying large peptide sets within complex biological matrices.

Purpose of the Study:

  • To evaluate the performance of the Q-Exactive mass spectrometer, featuring a quadrupole front-end and an Orbitrap mass analyzer, for high-resolution and accurate mass (HR/AM) based peptide quantification.
  • To develop and apply novel quantitative methods utilizing the Q-Exactive's capabilities for large-scale targeted proteomic studies.

Main Methods:

  • Utilized high-resolution and accurate mass (HR/AM) analysis on a Q-Exactive mass spectrometer.

Related Experiment Videos

  • Employed targeted analysis in MS mode (single ion monitoring) and MS/MS mode (parallel reaction monitoring).
  • Benchmarked performance against the established SRM technique using urine samples and analyzed 770 tryptic yeast peptides in a single experiment.

    • Main Results:

    • The quadrupole-orbitrap instrument demonstrated comparable or superior selectivity, dynamic range, and sensitivity to the SRM technique.
    • Novel acquisition methods leveraging multiplexing capabilities were successfully applied to large-scale targeted proteomic analysis.
    • Achieved quantification of 770 tryptic yeast peptides within a 60-minute experiment, showcasing high throughput.

    Conclusions:

    • The Q-Exactive mass spectrometer, with its unique quadrupole-orbitrap configuration, provides a powerful platform for precise and efficient peptide quantification in complex samples.
    • This technology has the potential to significantly improve protein quantification, supporting advancements in systems biology and biomarker evaluation studies.
    • The demonstrated multiplexing and HR/AM capabilities enable unprecedented scale in targeted proteomic analyses.