Glycan labeling strategies and their use in identification and quantification

Area of Science:

• Biochemistry and Glycomics
• Analytical Chemistry
• Carbohydrate Chemistry

Background:

• Analysis of oligosaccharides from biological samples often necessitates a glycan derivatization step.
• Derivatization modifies glycans to improve their detectability and separability using various analytical techniques.

Purpose of the Study:

• To review various aspects of glycan labeling, separation, and detection strategies.
• To highlight the importance of derivatization in enhancing oligosaccharide analysis and characterization.

Main Methods:

• Introduction of chromophores or fluorophores for enhanced detection via chromatography or electrophoresis.
• Attachment of charged or hydrophobic groups for improved separation and mass spectrometry.
• Permethylation for stabilizing sialic acids and enhancing mass spectrometry-based structural analysis.

Main Results:

• Derivatization facilitates sensitive detection and separation of glycans.
• Specific derivatization methods, like permethylation, aid in detailed structural elucidation, especially for sialylated glycans.
• Glycan labels enable attachment to surfaces or proteins for interaction studies with carbohydrate-binding proteins.

Conclusions:

• Glycan derivatization is a versatile and indispensable tool in oligosaccharide analysis.
• Strategic labeling and derivatization are key to advancing glycomic research and understanding carbohydrate functions.