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Peptide Identification Using Tandem Mass Spectrometry01:33

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Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties.
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...
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High-Throughput Mass Spectrometry-Based Proteomics with dia-PASEF.

Patricia Skowronek1, Florian Meier2,3

  • 1Department Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany.

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Summary

This study presents a protocol for high-throughput proteomics using trapped ion mobility-quadrupole time-of-flight mass spectrometry (TIMS-QTOF) with data-independent acquisition (dia-PASEF). The method enables reproducible quantification of thousands of protein groups daily from complex samples.

Keywords:
Data-independent acquisitionIon mobilityMass spectrometryPASEFProteomicsTIMSdia-PASEF

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Area of Science:

  • Proteomics
  • Analytical Chemistry
  • Biochemistry

Background:

  • Ion mobility separation is increasingly vital in mass spectrometry-based proteomics.
  • Trapped ion mobility-quadrupole time-of-flight (TIMS-QTOF) mass spectrometry offers advanced capabilities for proteomic analysis.

Purpose of the Study:

  • To describe a step-by-step protocol for high-throughput, label-free quantification using TIMS-QTOF with data-independent acquisition (dia-PASEF).
  • To optimize instrument setup, method design, data acquisition, and data analysis for efficient proteomic workflows.

Main Methods:

  • Utilized a TIMS-QTOF mass spectrometer with parallel accumulation-serial fragmentation (PASEF) operation mode.
  • Implemented data-independent acquisition (dia-PASEF) and ion mobility-aware data analysis with Spectronaut.
  • Integrated the EvosepOne liquid chromatography system for high-throughput sample processing.

Main Results:

  • Achieved high-throughput analysis of a human cancer cell line at 60 samples per day.
  • Quantified approximately 6000 protein groups with high reproducibility.
  • Demonstrated the protocol's adaptability to different gradients and sample types, including modified peptides.

Conclusions:

  • The developed protocol facilitates efficient and reproducible high-throughput proteomics using TIMS-QTOF and dia-PASEF.
  • The method is robust and adaptable for various sample types and experimental conditions.
  • This approach significantly enhances the capacity for large-scale proteomic studies.