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Related Experiment Video

Updated: Jun 19, 2026

Budding Yeast Protein Extraction and Purification for the Study of Function, Interactions, and Post-translational Modifications
09:22

Budding Yeast Protein Extraction and Purification for the Study of Function, Interactions, and Post-translational Modifications

Published on: October 30, 2013

Preserving the yeast proteome from sample degradation.

Julia Grassl1, Jules A Westbrook, Aisling Robinson

  • 1UCD Conway Institute of Biomolecular and Biomedical Research, School of Biomolecular and Biomedical Science, University College Dublin, Ireland.

Proteomics
|October 14, 2009
PubMed
Summary

Prevent sample degradation in proteomics using trichloroacetic acid (TCA) or thermal treatments. These methods effectively preserve intact proteins, improving proteomic analysis reproducibility, especially for yeast samples.

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Last Updated: Jun 19, 2026

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09:22

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Published on: February 16, 2015

Area of Science:

  • Proteomics
  • Biochemistry
  • Molecular Biology

Background:

  • Sample degradation during preparation is a significant challenge in proteomic analyses, leading to inaccurate results.
  • Preserving the native, intact proteome early in sample preparation is crucial for reliable proteomic data.

Purpose of the Study:

  • To evaluate the effectiveness of trichloroacetic acid (TCA) precipitation and thermal treatments in minimizing proteolysis during sample preparation for proteomic analysis.
  • To compare these methods with protease inhibitors and lyophilisation for sample preservation.

Main Methods:

  • Utilized the budding yeast Saccharomyces cerevisiae model system.
  • Applied trichloroacetic acid (TCA) precipitation and thermal treatments (approx. 95°C) prior to protein extraction.
  • Assessed sample integrity using 2-D PAGE and identified protein spots via MS/MS.

Main Results:

  • Both TCA precipitation and thermal treatment significantly reduced protein and peptide fragmentation compared to untreated samples.
  • These pre-treatment methods demonstrated superior efficacy in preventing sample degradation over protease inhibitors and lyophilisation.
  • Standardized protocols were established for reproducible protein pattern analysis in yeast.

Conclusions:

  • Trichloroacetic acid (TCA) and thermal treatments are highly effective methods for minimizing sample degradation in proteomic sample preparation.
  • These protocols enhance the reproducibility of 2-D PAGE analysis in yeast and may benefit other proteomic techniques.