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Updated: Jul 7, 2026
10:11
Glycopeptide Capture for Cell Surface Proteomics
Published on: May 9, 2014
Preparation of glycopeptides
1University of California San Diego, La Jolla, California, USA.
Current Protocols in Molecular Biology
|February 12, 2008
Summary
Generating glycopeptides from glycoproteins aids in analyzing oligosaccharide side chains. This method, using proteolysis, characterizes these structures and their linkages for large glycoproteins.
Area of Science:
- Biochemistry
- Glycobiology
- Proteomics
Background:
- Glycoproteins are crucial in biological processes.
- Analyzing oligosaccharide side chains is vital for understanding glycoprotein function.
- Characterizing glycopeptides aids in this analysis.
Purpose of the Study:
- To detail methods for generating glycopeptides from glycoproteins.
- To enable characterization of oligosaccharide side chains.
- To facilitate analysis of large glycoproteins like proteoglycans and mucins.
Main Methods:
- Proteolysis using enzymes like pronase, proteinase K, or specific endoproteinases (trypsin, alpha-chymotrypsin, V8 protease).
- Separation of resulting glycopeptides using reversed-phase chromatography.
- Enzymatic treatment with Peptide:N-glycosidase F to define linkages.
Main Results:
- Generation of glycopeptides with varying peptide lengths attached to oligosaccharides.
- Creation of glycopeptide maps analogous to peptide maps.
- Facilitation of oligosaccharide-peptide linkage definition and glycosylation site detection.
Conclusions:
- Proteolysis is an effective strategy for generating glycopeptides for analysis.
- These methods support detailed characterization of glycoprotein glycosylation.
- The techniques are applicable to large and complex glycoproteins.
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