Structural Characteristics,Antioxidant and Hypoglycemic Activities of Polysaccharide from Siraitia grosvenorii |
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| Authors: | Pin Gong Yuxi Guo Xuefeng Chen Dandan Cui Mengrao Wang Wenjuan Yang Fuxin Chen |
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| Affiliation: | 1.School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (Y.G.); (X.C.); (D.C.); (M.W.); (W.Y.);2.School of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China; |
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| Abstract: | ![]()
The structural characterization, the in vitro antioxidant activity, and the hypoglycemic activity of a polysaccharide (SGP-1-1) isolated from Siraitia grosvenorii (SG) were studied in this paper. SGP-1-1, whose molecular weight is 19.037 kDa, consisted of Gal:Man:Glc in the molar ratio of 1:2.56:4.90. According to the results of methylation analysis, GC–MS, and NMR, HSQC was interpreted as a glucomannan with a backbone composed of 4)-β-D-Glcp-(1→4)-, α-D-Glcp-(1→4)-, and 4)-Manp-(1 residues. α-1,6 linked an α-D-Galp branch, and α-1,6 linked an α-D-Glcp branch. The study indirectly showed that SGP-1-1 has good in vitro hypoglycemic and antioxidant activities and that these activities may be related to the fact that the SGP-1-1’s monosaccharide composition (a higher proportion of Gal and Man) is the glycosidic-bond type (α- and β-glycosidic bonds). SGP-1-1 could be used as a potential antioxidant and hypoglycemic candidate for functional and nutritional food applications. |
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| Keywords: | Siraitia grosvenorii polysaccharides, structure characterization, hypoglycemic activity, antioxidant activity, structure– function relationship |
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