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Related Experiment Video

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Comparison of sample preparation techniques for large-scale proteomics.

Miljan Kuljanin1, Dylan Z Dieters-Castator2, David A Hess3

  • 1Department of Biochemistry, University of Western Ontario, London, ON, Canada.

Proteomics
|November 19, 2016
PubMed
Summary
This summary is machine-generated.

High/low-pH (HpH) fractionation offers superior proteome depth for HeLa cell lysates. Reversed-phase fractionation and SCX StageTips are robust techniques for complex proteomic analysis.

Keywords:
Bottom-up proteomicsGel-eluted liquid fractionation entrapment electrophoresis (GELFrEE)High pHSCX StageTipSDS-PAGETechnology

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Area of Science:

  • Proteomics
  • Biochemistry
  • Analytical Chemistry

Background:

  • Large-scale bottom-up proteomics aims for deep proteome characterization.
  • Various sample preparation techniques exist, each with limitations.

Purpose of the Study:

  • To evaluate and compare common sample preparation techniques for HeLa lysate proteomic analysis.
  • To identify the most effective methods for maximizing proteome depth and efficiency.

Main Methods:

  • Comparison of unfractionated in-solution digests, SDS-PAGE with in-gel digestion, GELFrEE, SCX StageTips, and high-/low-pH (HpH) reversed-phase fractionation.
  • Proteomic characterization of HeLa cell lysates using these techniques.

Main Results:

  • HpH fractionation yielded the greatest proteome depth (>8400 proteins) and efficiency.
  • SCX StageTip fractionation demonstrated significant improvement over SDS-PAGE and GELFrEE with minimal sample handling.
  • Combining all workflows increased sequence coverage to 38% and total detected proteins to 8710.

Conclusions:

  • HpH fractionation is superior for achieving deep proteome coverage.
  • SCX StageTips offer an efficient and robust alternative for complex proteomic studies.
  • These techniques are highly suitable for comprehensive proteome analysis.