Fucose Migration Pathways Identified Using Infrared Spectroscopy

Area of Science:

• Carbohydrate Chemistry
• Analytical Chemistry
• Glycomics

Background:

• Fucose is a key monosaccharide in many glycans.
• Fucose migration during mass spectrometry analysis causes misinterpretation of fucosylated glycan structures.
• Accurate glycan sequencing is crucial for understanding biological processes.

Purpose of the Study:

• To resolve the structure of fucosylated glycan fragments after fucose migration using ion vibrational spectroscopy.
• To characterize the position and linkage of fucose following migration.
• To identify and characterize novel types of fucose migration.

Main Methods:

• Utilized ion vibrational spectroscopy to analyze fucosylated fragments of Lewis and blood group H antigen trisaccharides.
• Investigated the structural consequences of fucose migration in glycan fragments.
• Identified a new type of fucose migration without mass change.

Main Results:

• Successfully resolved the structure of fucosylated glycan fragments, including the position and linkage of migrated fucose.
• Demonstrated that the structure of fragment ions resulting from fucose migration can be characterized.
• Reported a novel type of local fucose migration that does not alter the fragment's mass.

Conclusions:

• Ion vibrational spectroscopy provides a powerful method for characterizing fucosylated glycans and understanding fucose migration.
• The findings enable accurate interpretation of glycomics data by addressing mass spectrometry limitations.
• Characterization of fucose migration is essential for advancing glycomics and understanding mass spectrometry-based analyses.