期刊
LWT-FOOD SCIENCE AND TECHNOLOGY
卷 119, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.lwt.2019.108794
关键词
Lactobacillus plantarum; Soybean protein isolate; Fermentation-induced gel; Protein structure; Intermolecular interactions
资金
- Excellent Youth Project of Natural Science Foundation of Heilongjiang Province [YQ2019C010]
- National Key Research and Development Program of China [2018YFD0400500, 2018YFD0400503]
The change of protein structure and intermolecular interaction during the formation of soy protein isolate (SPI) gel induced by Lactobacillus plantarum (L. plantarum) were investigated. In the present study, the peak value of UV-Vis spectra decreased gradually with the prolongation of fermentation time. Fermentation treatment resulted in a-helix content decreasing by 60.16%, while ji-sheet content increased by 68.15% (P < 0.05). The surface hydrophobicity was decreased by 62.31% (P < 0.05) due to the molecular aggregation of SPI. Correspondingly, the free sulfydryl group content decreased by 58.48% (P < 0.05). These results highlighted that the protein structure and intermolecular interaction of SPI could be significantly changed by L. plantarum fermentation. The main intermolecular interactions maintaining the fermentation-induced gel were hydrophobic interactions and disulfide bonds. This work provided theoretical support for the establishment of the mechanism of fermentation-induced gel and the rational application of L. plantarum in soybean products.
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