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Extraction, Structural Analysis, and Biofunctional Properties of Exopolysaccharide from Lactiplantibacillus pentosus B8 Isolated from Sichuan Pickle

文献类型： 外文期刊

作者： Jiang, Guangyang 1 ; Li, Ran 3 ; He, Juan 4 ; Yang, Li 1 ; Chen, Jia 1 ; Xu, Zhe 1 ; Zheng, Bijun 1 ; Yang, Yichen 1 ; Xia, Zhongmei 5 ; Tian, Yongqiang 1 ;

作者机构： 1.Sichuan Univ, Coll Biomass Sci & Engn, Chengdu 610065, Peoples R China

2.Sichuan Univ, Key Lab Leather Chem & Engn, Minist Educ, Chengdu 610065, Peoples R China

3.Sichuan Agr Univ, Coll Food Sci, Yaan 625014, Peoples R China

4.Sichuan Univ, Coll Life Sci, Key Lab Bioresources & Ecoenvironm, Minist Educ, Chengdu 610065, Peoples R China

5.Sichuan Acad Agr Sci, Inst Biotechnol & Nucle Technol, Chengdu 610066, Peoples R China

关键词： exopolysaccharide; structural analysis; biofunctional properties; Lactiplantibacillus pentosus

期刊名称：FOODS （ 影响因子：5.561； 五年影响因子：5.94 ）

ISSN：

年卷期： 2022 年 11 卷 15 期

页码：

收录情况： SCI

摘要： Two novel exopolysaccharides, named LPB8-0 and LPB8-1, were isolated and purified from Lactiplantibacillus pentosus B8. Moreover, their structure and bioactivities were evaluated through chemical and spectral means. The study results demonstrated that LPB8-0 was primarily composed of mannose and glucose and had an average molecular weight of 1.12 x 10(4) Da, while LPB8-1 was composed of mannose, glucose, and galactose and had an average molecular weight of 1.78 x 10(5) Da. Their carbohydrate contents were 96.2% +/- 1.0% and 99.1% +/- 0.5%, respectively. The backbone of LPB8-1 was composed of (1 -> 2)-linked alpha-D-Manp and (1 -> 6)-linked alpha-D-Manp. LPB8-0 and LPB8-1 had semicrystalline structures with good thermal stability (308.3 and 311.7 degrees C, respectively). SEM results displayed that both LPB8-0 and LPB8-1 had irregular thin-slice shapes and spherical body structures. Additionally, an emulsifying ability assay confirmed that LPB8-0 and LPB8-1 had good emulsifying activity against several edible oils, and this activity was retained under acidic, neutral, and high temperature conditions. Furthermore, an antioxidant assay confirmed that LPB8-1 had stronger scavenging activity than LPB8-0. Overall, these results provide a theoretical basis for the potential application of these two novel exopolysaccharides as natural antioxidants and emulsifiers in the food and pharmaceutical industries.

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