Journal
CARBOHYDRATE POLYMERS
Volume 281, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2021.119086
Keywords
Condensed tannin; Polysaccharide; Xyloglucan; Noncovalent binding; ITC; Molecular simulation
Categories
Funding
- China Scholarship Council (CSC)
- Institut National de Recherche pour l'Agriculture, l'Alimentation, et l'Environnement (INRAE)
- French government
- CNRS
- department of Vaucluse, Avignon University, PACA region
- European funds for regional development
- TERSYS Federative Research Structure (Platform 3A project, CPER 2014-2020)
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This study investigated the interactions between different xylose-containing water-soluble hemicelluloses and procyanidins. The results showed that the strength of the interactions between hemicelluloses and procyanidins depended on their structure rather than other incidental properties.
During processing of plant-based foods, cell wall polysaccharides and polyphenols, such as procyanidins, interact extensively, thereby affecting their physicochemical properties along with their potential health effects. Although hemicelluloses are second only to pectins in affinity for procyanidins in cell walls, a detailed study of their interactions lacks. We investigated the interactions between representative xylose-containing water-soluble hemicelluloses and procyanidins. Turbidity, ITC and DLS were used to determine the relative affinities, and theoretical calculations further ascertained the interactions mechanisms. Xyloglucan and xylan exhibited respectively the strongest and weakest interactions with procyanidins. The different arabinoxylans interacted with procyanidins in a similar strength, intermediate between xyloglucans and xylans. Therefore, the strength of the interaction depended on the structure itself rather than on some incidental properties, e.g., viscosity and molar mass. The arabinose side-chain of arabinoxylan did not inhibit interactions. The computational investigation corroborated the experimental results in that the region of interaction between xyloglucan and procyanidins was significantly wider than that of other hemicelluloses.
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