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Analysis of asparagine-linked oligosaccharides by sequential lectin-affinity chromatography
Methods in Molecular Biology (Clifton, N.J.)
|January 1, 1993
Summary
Immobilized lectins efficiently fractionate and aid in structural analysis of asparagine-linked sugar chains from glycoproteins. This method requires minimal sample, simplifying complex glycan studies.
Area of Science:
- Biochemistry
- Glycobiology
Background:
- Glycoproteins contain complex asparagine-linked sugar chains crucial for biological functions.
- Characterizing these glycans is essential but often challenging due to sample complexity and quantity.
Purpose of the Study:
- To demonstrate the utility of immobilized lectins for analyzing asparagine-linked glycans.
- To simplify the process of glycan fractionation and structural assessment.
Main Methods:
- Utilizing various immobilized lectins for lectin affinity chromatography.
- Preparing radiolabeled oligosaccharides from glycoproteins via hydrazinolysis or enzymatic digestion (e.g., using endo-beta-N-acetylglucosaminidases).
- Employing lectin binding for fractionation and structural elucidation.
Main Results:
- Immobilized lectins effectively fractionate asparagine-linked sugar chains.
- The method is sensitive, requiring less than 10 ng of radiolabeled oligosaccharide.
- Lectin-based fractionation simplifies subsequent structural studies.
Conclusions:
- Immobilized lectins provide a robust and efficient tool for glycoprotein glycan analysis.
- This approach significantly facilitates the structural characterization of N-linked oligosaccharides.
- The method's sensitivity and ease of use make it valuable for glycomics research.