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Glycan Remodeling with Processing Inhibitors and Lectin-Resistant Eukaryotic Cells.

Veronica T Chang1, Robert A Spooner, Max Crispin

  • 1Radcliffe Department of Medicine and MRC Human Immunology Unit, John Radcliffe Hospital, University of Oxford, Oxford, UK.

Methods in Molecular Biology (Clifton, N.J.)
|June 18, 2015
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Summary
This summary is machine-generated.

Altering glycoprotein N-glycans aids structural analysis. Researchers detail two methods: using processing inhibitors and selecting mutated cell lines, enabling controlled modification of oligosaccharide processing in eukaryotic cells.

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Area of Science:

  • Glycobiology
  • Molecular Biology
  • Biochemistry

Background:

  • Glycoproteins are crucial in metazoan biology, with their carbohydrate (glycan) structures impacting function and disease.
  • Disruptions in glycan biosynthesis lead to disease phenotypes, highlighting the significance of specific glycoforms.
  • The extensive carbohydrate content of glycoproteins can impede structural and functional characterization.

Purpose of the Study:

  • To present two distinct methods for engineering and predefining N-glycans on glycoproteins.
  • To enable detailed functional characterization of glycans and facilitate their subsequent removal.
  • To provide tools for controlled alteration of oligosaccharide processing in eukaryotic cells for protein expression and structural analysis.

Main Methods:

  • Utilizing specific chemical inhibitors to interfere with oligosaccharide processing pathways.
  • Employing cytotoxic lectins to select for eukaryotic cell lines with mutations in genes controlling oligosaccharide processing.
  • Applying these methods to eukaryotic cells for heterologous protein expression.

Main Results:

  • Demonstrated two effective strategies for manipulating N-glycan structures on glycoproteins.
  • Showcased the capacity for controlled and significant alteration of oligosaccharide processing.
  • Validated the utility of these approaches in facilitating glycoprotein structural analysis.

Conclusions:

  • Interfering with oligosaccharide processing through inhibitors or cell line selection offers powerful control over N-glycan structures.
  • These methods are highly valuable for characterizing glycoprotein function and enabling detailed structural studies.
  • The described approaches enhance the analysis of glycoproteins in various biological and biotechnological applications.