Related Experiment Video
Updated: Dec 17, 2025
09:54
Identification and Characterization of Protein Glycosylation using Specific Endo- and Exoglycosidases
Published on: December 26, 2011
37.3K
A Chemoenzymatic Method Based on Easily Accessible Enzymes for Profiling Protein O-GlcNAcylation
Senhan Xu1, Fangxu Sun1, Ronghu Wu1
1School of Chemistry and Biochemistry and the Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.
Analytical Chemistry
|June 24, 2020
Summary
A new chemoenzymatic method simplifies O-GlcNAcylation analysis using accessible reagents. This cost-effective approach enables global and site-specific study of protein O-GlcNAcylation in diverse biological samples.
Area of Science:
- Biochemistry
- Glycoscience
- Proteomics
Background:
- O-GlcNAcylation is a crucial protein post-translational modification regulating gene expression and cell signaling.
- Analyzing O-GlcNAcylation is challenging due to low protein abundance and sample complexity.
- Existing methods often rely on expensive or complex reagents.
Purpose of the Study:
- To develop a novel, cost-effective chemoenzymatic method for global and site-specific O-GlcNAcylation analysis.
- To provide an accessible alternative to existing, more complex methods.
- To facilitate broader research in glycoscience.
Main Methods:
- Utilized a wild-type galactosyltransferase and uridine diphosphate galactose (UDP-Gal).
- Integrated enzymatic reactions with hydrazide chemistry for peptide enrichment.
- Performed biological triplicate experiments for validation and reproducibility.
Main Results:
- Developed a novel chemoenzymatic method for O-GlcNAcylation analysis.
- The method is cost-effective and uses readily accessible reagents.
- Identified 18 unique O-glucosylated peptides on EGF domains from nine proteins, demonstrating method efficacy.
- Results are comparable to previous methods using engineered enzymes and click chemistry.
Conclusions:
- The developed chemoenzymatic method offers an effective and approachable approach for O-GlcNAcylation analysis.
- This method is suitable for global analysis across various sample types without restrictions.
- It advances glycoscience research by simplifying the study of protein O-GlcNAcylation.
