Structural Identification of Physalis alkekengi L. Polysaccharides

文献类型： 外文期刊

第一作者： Zhang, Yun

作者： Zhang, Yun;Wen, Xuan;Xu, Neng;Fu, Hongyan;Lv, Ge;Yu, Wenjie;Wei, Lina;Zhao, Lin

作者机构：

关键词： Physalis alkekengi L.; polysaccharide; ion chromatography; methylation; nuclear magnetic resonance spectrum analysis; structural identification

期刊名称：MOLECULES （ 影响因子：4.6； 五年影响因子：5.0 ）

ISSN：

年卷期： 2025 年 30 卷 4 期

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收录情况： SCI

摘要： Physalis alkekengi L. fruit polysaccharides can reduce blood sugar, regulate blood lipids, and improve intestinal flora structure. However, the specific polysaccharide components exerting these effects are unclear. In this study, we extracted, separated, purified, and characterized the P. alkekengi polysaccharides Phy-1a, Phy-1b, and Phy-1c. Ion chromatography showed that Phy-1b was mainly composed of rhamnose, arabinose, galactose, glucose, and xylose at a molar ratio of 3.0:19.8:47.5:20.9:8.8, and Phy-1c was composed of rhamnose, arabinose, galactose, glucose, xylose, mannose, ribose Galactosamine hydrochloride and Glucosamine hydrochloride at a molar ratio of 10.4:7.9:22.8:30.5:4.6:4.4:19.4:3.9:5.8. Neither of these polysaccharides contained uronic acid, indicating their neutral property. Methylation analysis and nuclear magnetic resonance spectroscopy showed that Phy-1b was mainly composed of terminal sugars (1-Araf); 1,5-Araf; 1,4-Xylp; 1-Glcp; 2,4-Rhap; 1,3-Glcp; 1,4-Galp; 1,4-Glcp; 1,3-Galp; 1,6-Glcp; 1,3,6-Glcp; and 1,4,6-Galp at a molar ratio of 5.2:7.1:7.8:13.7:6.3:11.2:7.0:16.3:7.4:6.0:6.8:5.3, with the main chain being -> 2)-alpha-L-Rhap-(1 -> 4)-beta-d-Galp-(1 -> 4)-beta-d-Galp-(1 ->[3)-beta-d-Glcp-(1]2 -> 3)-beta-d-Glcp-(1 ->[4)-beta-d-Glcp-(1]2 -> and the branched chains being beta-L-Araf-(1 -> 5)-beta-L-Araf-(1 ->, beta-d-Glcp-(1 -> 4)-beta-d-Xylp-(1 -> 3)-beta-d-Galp-(1 ->, and beta-d-Glcp-(1 -> 6)-beta-d-Glcp-(1 ->. The three fragments, respectively, pass through the O-4 key of -> 2,4)-alpha-l-Rhap-(1 ->, O-6 key of -> 4,6)-beta-d-Galp-(1 ->, and O-6 of -> 3,6)-beta-d-Glcp-(1 -> connected to the main chain. These results provide a reference for enhancing the utilization value of P. alkekengi resources to promote its high-value and efficient processing.

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