Hybrid Quadrupole Mass Filter-Radial Ejection Linear Ion Trap and Intelligent Data Acquisition Enable Highly...

Area of Science:

• Proteomics
• Analytical Chemistry
• Biotechnology

Background:

• Targeted mass spectrometry (MS) methods, including selected reaction monitoring (SRM) and parallel reaction monitoring (PRM), are crucial for sensitive peptide analysis in clinical settings.
• Current SRM and PRM methods are limited to approximately 100 targets, hindering high-throughput applications.

Purpose of the Study:

• To introduce a novel MS platform designed for high-throughput, targeted peptide quantification.
• To demonstrate the platform's capability for analyzing thousands of peptides per hour with enhanced sensitivity.

Main Methods:

• Development of a new MS platform integrating a quadrupole mass filter, collision cell, and linear ion trap.
• Utilizing high acquisition rates (70-100 Hz) and real-time chromatogram alignment for increased throughput.
• Employing the Skyline software tool for targeted method development using data-independent acquisition libraries or heavy labeled standards.

Main Results:

• The new platform achieves high multiplexing, targeting 5000-8000 peptides per hour.
• Demonstrated approximately 10-fold lower limits of quantitation (LOQs) compared to traditional SRM for highly multiplexed assays.
• Investigated the impact of method duration and analyte number on assay performance.

Conclusions:

• The developed MS platform significantly enhances throughput and sensitivity for targeted peptide analysis.
• This technology overcomes the limitations of current methods, enabling large-scale multiplexed peptide quantification.
• Findings provide guidance for optimizing assay performance in high-throughput proteomics.