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Hydrophobic aggregation via partial Gal removal affects solution characteristics and fine structure of tamarind kernel polysaccharides

文献类型： 外文期刊

作者： Guo, Rui 1 ; Sun, Xianbao 1 ; Kou, Yuxing 1 ; Song, Hong 1 ; Li, Xujiao 1 ; Song, Lihua 1 ; Zhao, Taolei 2 ; Zhang, Hui 2 ; Li, Deshun 3 ; Liu, Yanfang 3 ; Song, Zibo 4 ; Wu, Jieli 6 ; Wu, Yan 1 ;

作者机构： 1.Shanghai Jiao Tong Univ, Shanghai Engn Res Ctr Food Safety, Sch Agr & Biol, Shanghai 200240, Peoples R China

2.Univ Shanghai Sci & Technol, Shanghai Engn Res Ctr Food Microbiol, Sch Hlth Sci & Engn, Shanghai 200093, Peoples R China

3.Shanghai Acad Agr Sci, Inst Edible Fungi, Natl Engn Res Ctr Edible Fungi, Natl R&D Ctr Edible Fungi Proc,Key Lab Edible Fung, Shanghai 201403, Peoples R China

4.Yunnan Maoduoli Grp Food Co Ltd, Yuxi 653100, Peoples R China

5.Shanghai Acad Agr Sci, Minist Agr & Rural Affairs, Inst Agrifood Stand & Testing Technol, Lab Qual & Safety Risk Assessment Agroprod Shangha, Shanghai 201403, Peoples R China

6.Shanghai Jiao Tong Univ, Instrumental Anal Ctr, Shanghai 200240, Peoples R China

7.Wyatt Technol Corp, Beijing Representat Off, Beijing 100082, Peoples R China

关键词： Tamarindus indica L; Tamarind kernel polysaccharide; Hydrophobic aggregation; Partial degalactosylation; Solution characteristics; Structural characteristics

期刊名称：FOOD HYDROCOLLOIDS （ 影响因子：10.7； 五年影响因子：10.9 ）

ISSN： 0268-005X

年卷期： 2023 年 144 卷

页码：

收录情况： SCI

摘要： The role of molecular aggregation was further investigated on solution and structural characteristics of tamarind kernel polysaccharides (TKPs vs. CTKPs) via partial degalactosylation. In addition to the distinctive aggregation-disaggregation behaviors observed when complexed with Congo red, TKPs and CTKPs in the capillary viscous behaviors behaved as relatively ordered semi-flexible coil, and showed augmented intermolecular interactions during partial degalactosylation. Concretely, the sheet-like structure evolving from ordered architecture contributed more to the conformational asymmetry, where hydrophobic microdomains were sufficiently pro-moted and solute-solute interactions dominated. Meanwhile, the stiffer semi-flexible primary aggregates with dwindling chain stiffness exhibited stronger and larger-scale hydrophobic aggregations. Considering the multiple interplays of hydrophobic interactions, the role of hydrophobic aggregation could be dissimilar between TKPs and CTKPs, which manifested in the hierarchical change of microstructure as well as susceptibility of structural oligosaccharide motifs to partial degalactosylation, thereby favoring hydrophobic aggregation in varying de-grees. Finally, the mechanism of hydrophobic aggregation under partial degalactosylation was further illustrated, which was expected to promote tailored valorizations of tamarind kernel polysaccharide in more potential fields.

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