Mechanistic insights into the improving effects of germination on physicochemical properties and antioxidant activity of protein isolate derived from black and white sesame
文献类型： 外文期刊
作者： Hu, Shuai 1 ; Gao, Hongxia 2 ; Ouyang, Linghua 1 ; Li, Xin 1 ; Zhu, Shuilan 1 ; Wu, Yong 3 ; Yuan, Linfeng 1 ; Zhou, Jinying 1 ;
作者机构： 1.Jiangxi Acad Agr Sci, Inst Agr Prod Proc, Nanchang 330200, Jiangxi, Peoples R China
2.Nanchang Univ, State Key Lab Food Sci & Technol, Nanchang 330047, Jiangxi, Peoples R China
3.Nanchang Univ, Sino German Joint Res Inst, Nanchang 330047, Jiangxi, Peoples R China
4.Jiangxi Acad Agr Sci, Inst Agr Prod Proc, 602 Nanlian Rd, Nanchang 330200, Jiangxi, Peoples R China
关键词： Germination; Sesame; Protein isolate; Protein structure; Functional properties; Antioxidant activities
期刊名称：FOOD CHEMISTRY （ 影响因子：8.8； 五年影响因子：8.6 ）
ISSN： 0308-8146
年卷期： 2023 年 429 卷
页码：
收录情况： SCI
摘要： Germination is a natural green technology to improve the nutritional and techno-functional quality of plantbased proteins. In this study, the mechanism of improving the functional and antioxidant properties of black and white sesame protein isolates (SPI) through germination process was investigated. Results showed that the surface hydrophobicity and sulfhydryl content increased significantly after germination, which were supported by multispectral analysis suggesting the exposed and unfolded conformational transition of germinated SPI. Moreover, the increased particle size was observed by microscopy analysis and reducing electrophoresis, which indicated that depolymerized protein molecules were rearranged to form protein aggregates during germination. The structural modification induced by germination contributed to the superior solubility (increased to 3.15-fold and 2.36-fold at pH 8 for black and white SPI, respectively), foaming capacity (increased to 3.99-fold and 1.69fold, respectively), emulsifying ability (increased to 2.84-fold and 2.71-fold, respectively), and diverse chemical antioxidant activities (increased up to 5.60-fold) of SPI in both varieties. This was the first comprehensive study to investigate germination as a promising technology for obtaining high-quality SPI.
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