The complexity of glycoprotein-derived glycans

Area of Science:

• Carbohydrate Chemistry
• Structural Biology
• Biochemistry

Background:

• Glycoproteins play crucial roles in various biological processes.
• Understanding the structure of their glycan chains is essential for elucidating their functions.
• Existing methods for glycan structure determination can be challenging, especially for complex structures.

Purpose of the Study:

• To review studies employing high-resolution 1H-NMR spectroscopy for glycoprotein-derived glycan structure determination.
• To highlight the utility of the structural reporter group concept in this field.
• To demonstrate the application of this approach to complex and heterogeneous glycans.

Main Methods:

• Utilized high-resolution 1H-NMR spectroscopy.
• Developed and applied the structural reporter group concept.
• Analyzed numerous glycoprotein-derived glycan structures, including complex and heterogeneous examples.

Main Results:

• Successfully determined unambiguous primary structures of glycoprotein-derived glycans.
• Discovered numerous novel glycan structures.
• Identified and corrected several previously reported glycan structures.
• Demonstrated the method's efficacy on highly complex glycoproteins.

Conclusions:

• High-resolution 1H-NMR spectroscopy combined with the structural reporter group concept is a powerful tool for glycan structure elucidation.
• This approach provides critical insights into glycan metabolism, in vivo function, and aids in interpreting data from other techniques.
• The findings are relevant for understanding health and disease states influenced by glycans.