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Related Experiment Videos

Protein Equalizer Technology : the quest for a "democratic proteome".

Pier Giorgio Righetti1, Egisto Boschetti, Lee Lomas

  • 1Department of Chemistry, Materials and Chemical Engineering Giulio Natta, Politecnico di Milano, Milano, Italy. piergiorgio.righetti@polimi.it

Proteomics
|June 27, 2006
PubMed
Summary

Oligarchic proteomes hide rare proteins. Protein Equalizer Technology uses special beads to reduce abundant proteins and boost low-abundance ones, revealing the "unseen proteome" and improving protein purification. This advances proteomic analysis and biopharmaceutical production.

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Area of Science:

  • Proteomics
  • Biochemistry
  • Analytical Chemistry

Background:

  • Proteome analysis is often dominated by abundant proteins, obscuring low-abundance or rare proteins.
  • Existing pre-fractionation techniques rely on depletion, which can be problematic.
  • There is a need for methods that enhance the detection of the entire proteome.

Purpose of the Study:

  • To introduce and evaluate a novel "Protein Equalizer Technology" for reducing protein concentration differences in complex samples.
  • To demonstrate the ability of this technology to reveal previously undetected proteins in proteomic analyses.
  • To showcase the application of this technology for purifying recombinant and naturally sourced proteins.

Main Methods:

  • Development of "Protein Equalizer Technology" using a library of combinatorial ligands on spherical porous beads.

Related Experiment Videos

  • Incubation of complex proteomes (human urine, serum, egg white, cell lysates) with equalizer beads.
  • Application of equalizer beads for host cell protein removal in purified protein samples.

    • Main Results:

    • The equalizer beads successfully reduced the concentration of abundant proteins while enhancing low-abundance species in various proteomes.
    • Analysis of equalized human urine and serum samples led to the discovery of numerous previously unreported proteins.
    • The technology effectively removed residual impurities from purified proteins, achieving high purity with minimal product loss.

    Conclusions:

    • Protein Equalizer Technology offers a novel approach to democratize proteomic analysis by equalizing protein concentrations.
    • This method significantly enhances the detection of the "unseen proteome", advancing proteomics research.
    • The technology provides a cost-effective solution for high-purity protein production in biopharmaceutical applications.