Synthesis of alpha-linked glucosides from soybean isoflavone aglycones using amylosucrase from Deinococcus geothermalis

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Title
Synthesis of alpha-linked glucosides from soybean isoflavone aglycones using amylosucrase from Deinococcus geothermalis
Author(s)
Y S Jung; H G Kim; Seon Min Oh; D Y Lee; C S Park; D O Kim; N I Baek
Bibliographic Citation
Journal of Agricultural and Food Chemistry, vol. 71, no. 5, pp. 2430-2437
Publication Year
2023
Abstract
Soybean isoflavone aglycones (SIAs) have many biological activities but are poorly water-soluble in the human body. Glycosylation provides structural diversity to SIAs and can alter their physicochemical properties, including water solubility. An alpha-linked glucosylation of SIA was achieved using amylosucrase from Deinococcus geothermalis. A total of 13 alpha-linked glucosyl SIAs were obtained, and their colors in solution were confirmed. The structures of the isolated compounds were identified by mass spectrometry and multidimensional nuclear magnetic resonance spectroscopy. The amylosucrase transglycosylation formed new isoflavone glycosides with alpha glycosidic bonds at C-7 and/or C-4' of SIAs, followed by the production of isoflavone glycosides with alpha (1 → 6) glycosidic bonds. The products with a glucosyl moiety attached to the C-4' of SIAs were found to be more water-soluble than their counterparts attached to the C-7 and/or beta-linkages. This study suggests a strategy for the synthesis of bioactive compounds with enhanced water solubility through alpha-linked glucosylation.
Keyword
Alpha-linked glucosylationAmylosucraseGlycosyltransferaseIsoflavone derivativesTransglycosylationWater solubility
ISSN
0021-8561
Publisher
Amer Chem Soc
DOI
http://dx.doi.org/10.1021/acs.jafc.2c07778
Type
Article
Appears in Collections:
1. Journal Articles > Journal Articles
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