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A nonenzymatic method for cleaving polysaccharides to yield oligosaccharides for structural analysis.
Matthew J Amicucci1,2,3, Eshani Nandita2,3, Ace G Galermo2,3
1Agricultural and Environmental Chemistry Graduate Group, University of California, Davis, CA, USA.
Nature Communications
|August 10, 2020
Summary
Researchers developed a chemical method to break down complex polysaccharides into smaller oligosaccharides. This technique enables detailed analysis of carbohydrate structures and functions in food and clinical samples.
Area of Science:
- Carbohydrate Chemistry
- Biochemistry
- Analytical Chemistry
Background:
- Polysaccharides are abundant yet poorly understood biomolecules due to structural complexity and lack of sequencing methods.
- Unlike polynucleotides and proteins, polysaccharides lack universal enzymatic digestion tools for structural analysis.
- Advanced mass spectrometry techniques are hindered by the large, branched nature of polysaccharides.
Purpose of the Study:
- To develop a novel chemical method for the universal digestion of polysaccharides into analyzable oligosaccharides.
- To establish a method for polysaccharide identification and compositional analysis using oligosaccharide fingerprinting.
- To demonstrate the application of this technique in food science and clinical diagnostics.
Main Methods:
- Development of a chemical method for controlled polysaccharide depolymerization.
- Characterization of released oligosaccharides using high-performance liquid chromatography-mass spectrometry (LC-MS).
- Application of oligosaccharide fingerprinting for polysaccharide identification.
Main Results:
- Successful generation of oligosaccharides from complex polysaccharides.
- High-sensitivity, high-throughput characterization of oligosaccharides via LC-MS.
- Demonstrated utility in identifying polysaccharides and determining their composition in food and fecal samples.
Conclusions:
- The developed chemical method provides a universal approach to polysaccharide analysis.
- Oligosaccharide fingerprinting via LC-MS is a powerful tool for polysaccharide identification.
- This technique has significant implications for food analysis, microbiome studies, and clinical research.
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