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Updated: Jun 17, 2026
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Metabolic Glycoengineering of Sialic Acid Using N-acyl-modified Mannosamines
Published on: November 25, 2017
Sialidase substrate specificity studies using chemoenzymatically synthesized sialosides containing C5-modified sialic
Hongzhi Cao1, Yanhong Li, Kam Lau
1Department of Chemistry, University of California-Davis, One Shields Avenue, Davis, California 95616, USA.
Organic & Biomolecular Chemistry
|December 22, 2009
Summary
Researchers synthesized novel sialic acid derivatives to probe bacterial sialidase activity. Modifications at the C5 hydroxyl group revealed insights into substrate recognition and cleavage mechanisms.
Area of Science:
- Carbohydrate Chemistry
- Enzymology
- Biochemistry
Background:
- Sialic acids are crucial in biological recognition events.
- Bacterial sialidases play roles in pathogenesis and microbial ecology.
- Understanding sialidase substrate specificity is vital for therapeutic and diagnostic applications.
Purpose of the Study:
- To synthesize novel sialic acid derivatives with systematic C5 hydroxyl group modifications.
- To investigate the impact of C5 substitutions on bacterial sialidase activity.
- To develop chemical probes for studying sialidase-substrate interactions.
Main Methods:
- Chemoenzymatic synthesis of para-nitrophenol-tagged sialyl galactosides.
- Systematic substitution of the C5 hydroxyl group with H, F, OCH3, or N3.
- High-throughput screening assays using bacterial sialidases.
Main Results:
- Successful synthesis of diverse C5-modified sialic acid derivatives.
- Demonstrated the utility of these compounds as probes for sialidase activity.
- Identified the importance of the C5 hydroxyl group in sialidase recognition and cleavage.
Conclusions:
- The C5 position of sialic acid is critical for bacterial sialidase function.
- Developed novel chemical tools for studying sialic acid-carbohydrate interactions.
- Chemoenzymatic synthesis provides an efficient route to functionalized sialic acid analogs.
