Characterization of glycoproteins and oligosaccharides using mass spectrometry

  • Author / Creator
    Fentabil, Messele
  • This thesis describes the application of mass spectrometry (MS) to glycoprotein and oligosaccharide analysis. Glycosylated proteins are involved in cell-cell and cell-matrix recognition. Applications of trypsin and proteinase K to hydrolyze glycoproteins into glycopeptides that are compatible with MS and MS/MS analysis are investigated. For successful site-specific analysis of glycans, glycopeptides with short peptide (3-8 residues) are needed. Although trypsin is an important enzyme for protein identification, proteinase K is superior for site-specific glycan analysis due to its potential to hydrolyze every glycoprotein to short glycopeptides. The gas-phase dissociation pathways, kinetics and energetics of protonated oligosaccharides are described. The oligosaccharides dissociate via cleavage at the glycosidic linkages during thermal activation. Using double resonance experiments, it was established that oligosaccharides undergo sequential and parallel fragmentation reactions. Furthermore, dissociation of product ions to secondary ions was confirmed. Arrhenius activation parameters, Ea and A for protonated alpha- and beta-linked D-glucopyranose oligosaccharides are reported.

  • Subjects / Keywords
  • Graduation date
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
  • Language
  • Institution
    University of Alberta
  • Degree level
  • Department
  • Supervisor / co-supervisor and their department(s)
  • Examining committee members and their departments
    • Szymanski, Christine (Department of Biological Sciences)
    • Lucy, Charles (Department of Chemistry)