An ultrasonic-extracted arabinoglucan from Tamarindus indica L. pulp: A study on molecular and structural characterizations

文献类型： 外文期刊

第一作者： Guo, Rui

作者： Guo, Rui;Li, Xujiao;Kou, Yuxing;Hu, Hao;Liu, Xin;Wu, Yan;Chen, Xiangyu;Li, Deshun;Liu, Yanfang;Ai, Lianzhong;Song, Zibo;Song, Zibo

作者机构：

关键词： Tamarindus indica L. pulp; Arabinoglucan; Structural analysis

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：6.953； 五年影响因子：6.737 ）

ISSN： 0141-8130

年卷期： 2020 年 164 卷

页码：

收录情况： SCI

摘要： In this study, an ultrasonic-extracted polysaccharide (nCPTP-55) was obtained with the highest yield (61.08%, w/w) from tamarind pulp, which consisted chiefly of total sugar (85.98%, w/w) with few protein (2.10%, w/w). Monosaccharide analysis showed nCPTP-55 was mainly composed of arabinose (39.19 mol%) and glucose (50.48 mol%) with negligible GlcA (2.05 mol%), indicating the neutral nature of nCPTP-55, which was further elucidated structurally via GC-MS and NMR, i.e., an arabinoglucan composed of -> 3)-beta-D-Glcp-(1 -> backbone with only T-alpha-L-Araf-(1 -> branched at O-4 (27.82%) and O-6 (39.99%), resulting in relatively high A/G ratio (0.68-0.70). Based on MM2 minimized energy, the 3D schematic structures of nCPTP-55 could be considered as structural basis for its conformational behavior, which was preliminarily estimated via HPSEC-MALLS as between compact sphere and loosely hyper-branched chain (rho = 0.84). Therefore, the relationship between molecular structure and conformational behavior was basically established for nCPTP-55, which was in a bid to have a better knowledge of its structure-property and structure-bioactivity relationships potentially required for more applications in food, cosmetic and pharmaceutical fields. (C) 2020 Elsevier B.V. All rights reserved.

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