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Critical assessment of accelerating trypsination methods.

Hanne Kolsrud Hustoft1, Leon Reubsaet, Tyge Greibrokk

  • 1Department of Chemistry, University of Oslo, PO Box 1033, Blindern, NO-0315 Oslo, Norway.

Journal of Pharmaceutical and Biomedical Analysis
|August 30, 2011
PubMed
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Accelerated trypsination methods in proteomics do not improve protein identification efficiency compared to conventional overnight digestion. Standard 37°C digestion remains optimal for comprehensive proteomics due to sample complexity.

Area of Science:

  • Proteomics
  • Analytical Chemistry
  • Biochemistry

Background:

  • Protein digestion is a critical step in LC-MS/MS proteomics.
  • Traditional overnight digestion at 37°C is time-consuming but ensures complete protein breakdown.
  • Accelerating trypsination methods aim to reduce digestion time without compromising efficiency.

Purpose of the Study:

  • To evaluate the efficiency of four accelerated trypsination methods.
  • To compare accelerated methods against conventional overnight digestion.
  • To determine the optimal trypsination strategy for proteomics.

Main Methods:

  • Four accelerated trypsination methods were tested: infrared (IR) assisted, microwave assisted, solvent aided, and immobilized trypsination.
  • Methods were compared to conventional 37°C overnight digestion.

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  • A four-protein mixture was used, and efficiency was assessed by sequence coverage and intact protein peak area.

    • Main Results:

    • All tested accelerated trypsination methods successfully digested proteins.
    • None of the accelerated methods demonstrated superior protein identification efficiency compared to conventional 37°C overnight digestion.
    • Conventional digestion is user-friendly and effective for diverse protein samples.

    Conclusions:

    • Conventional 37°C overnight trypsination is recommended for comprehensive proteomics.
    • Digestion time optimization is feasible for targeted proteomics.
    • Standard overnight digestion is a reliable starting point for new proteomics researchers.