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Acetyl Group Migration in Xylan and Glucan Model Compounds as Studied by Experimental and Computational Methods
Robert Lassfolk1, Manuel Pedrón2, Tomás Tejero3
1Laboratory of Molecular Science and Engineering, Åbo Akademi University, 20500Turku, Finland.
The Journal of Organic Chemistry
|October 17, 2022
Summary
Acetyl groups can migrate within and between saccharide units in polysaccharides. This study reveals migration in xylan and glucan models occurs from secondary to primary hydroxyl groups.
Area of Science:
- Carbohydrate Chemistry
- Biochemistry
- Glycobiology
Background:
- Acetyl group migration within oligosaccharides was previously demonstrated.
- Naturally acetylated polysaccharides like xyloglucans and xylans play vital roles in plant cells.
- Understanding acetyl migration may elucidate polysaccharide biological activity regulation.
Purpose of the Study:
- To investigate acetyl group migration in synthesized xylan and glucan trisaccharide model compounds.
- To elucidate the directionality of acetyl migration between saccharide units.
- To explore the potential role of acetyl migration in the biological activity of polysaccharides.
Main Methods:
- Combination of experimental techniques.
- Computational methods for detailed analysis.
- Synthesis of xylan and glucan trisaccharide model compounds.
Main Results:
- Acetyl group migration between saccharide units was confirmed in xylan and glucan models.
- Migration proceeds from a secondary hydroxyl group of one saccharide unit.
- The acetyl group moves toward a primary hydroxyl group of an adjacent saccharide unit.
Conclusions:
- Acetyl group migration between saccharide units is a defined process.
- The directionality of migration (secondary to primary hydroxyl) is established.
- This finding contributes to understanding the biological functions of acetylated polysaccharides.
