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Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...

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Fast Enzymatic Processing of Proteins for MS Detection with a Flow-through Microreactor
09:49

Fast Enzymatic Processing of Proteins for MS Detection with a Flow-through Microreactor

Published on: April 6, 2016

Multidigestion in continuous flow tandem protease-immobilized microreactors for proteomic analysis.

Hiroshi Yamaguchi1, Masaya Miyazaki, Hirofumi Kawazumi

  • 1Measurement Solution Research Center, National Institute of Advanced Industrial Science and Technology, Tosu, Saga 841-0052, Japan.

Analytical Biochemistry
|August 3, 2010
PubMed
Summary

This study introduces a rapid microreactor system for protein analysis, improving proteomic sequencing and post-translational modification identification. The continuous flow system enhances speed and sequence coverage compared to traditional methods.

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Area of Science:

  • Proteomics
  • Analytical Chemistry
  • Biochemistry

Background:

  • Proteolysis is crucial for proteomic studies using mass spectrometry (MS).
  • Conventional in-solution protein digestion is slow and lacks sensitivity.
  • Existing methods for analyzing protein post-translational modifications can be complex.

Purpose of the Study:

  • To develop a rapid, continuous flow system for protein sequence and post-translational modification analysis.
  • To evaluate the performance of single and tandem enzyme-immobilized microreactors.
  • To demonstrate the capability for phosphorylation site analysis without enrichment or labeling.

Main Methods:

  • Utilized enzyme-immobilized microreactors (trypsin, chymotrypsin, alkaline phosphatase) in a continuous flow system.
  • Tested single and tandem microreactor configurations.
  • Analyzed nonphosphoprotein (cytochrome c) and phosphoproteins (β-casein, pepsin A).

Main Results:

  • Single microreactors demonstrated faster digestion than in-solution methods.
  • Tandem microreactors achieved higher protein sequence coverage.
  • A protease-phosphatase tandem microreactor successfully identified phosphorylation sites without enrichment or radioisotope labeling.

Conclusions:

  • The microreactor system offers a simple, rapid, and sensitive approach for proteomic analysis.
  • Tandem microreactors significantly enhance sequence coverage and enable direct phosphorylation site analysis.
  • This technology provides a versatile platform for developing linked microreactor-based multienzymatic systems for proteomics.