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Related Experiment Videos

Protein processing and other modifications analyzed by diagonal peptide chromatography.

Kris Gevaert1, Petra Van Damme, Bart Ghesquière

  • 1Department of Medical Protein Research and Biochemistry, Flanders Interuniversity Institute for Biotechnology and Faculty of Medicine and Health Sciences, Ghent University, A. Baertsoenkaai 3, B-9000 Ghent, Belgium. kris.gevaert@ugent.be

Biochimica Et Biophysica Acta
|October 13, 2006
PubMed
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Combined Fractional Diagonal Chromatography (COFRADIC) enhances proteomics by modifying peptide side-chains for distinct separation. This versatile technique efficiently analyzes various post-translational modifications, improving protein processing studies.

Area of Science:

  • Biochemistry
  • Proteomics
  • Analytical Chemistry

Background:

  • Diagonal peptide chromatography, established in 1966, separates peptides based on altered properties after modification.
  • High-throughput gel-free proteomics requires advanced separation techniques.

Purpose of the Study:

  • To review and assess the potential of Combined Fractional Diagonal Chromatography (COFRADIC) for analyzing post-translational modifications.
  • To highlight COFRADIC's versatility in isolating peptides with specific modifications.

Main Methods:

  • COFRADIC utilizes two sequential, identical peptide separations with an intermediate chemical or enzymatic modification.
  • The technique exploits hydrophobicity differences in reverse-phase liquid chromatography for peptide segregation.

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Main Results:

  • COFRADIC enables higher throughput gel-free proteomics.
  • Previously established protocols analyze methionyl, cysteinyl, amino terminal, and phosphorylated peptides.
  • The review discusses COFRADIC's potential for analyzing phosphorylation and N-glycosylation.

Conclusions:

  • COFRADIC is a versatile technique for analyzing various post-translational modifications and in vivo protein processing events.
  • The method's adaptability allows for the isolation and analysis of specifically modified peptides.