量化预烤对黄豆蛋白结构和功能性质的影响
Yanyan Lao1, Qianyu Ye1, Yong Wang1
1School of Chemical Engineering, UNSW Sydney, Kensington, NSW 2052, Australia.
Food research international (Ottawa, Ont.)
|September 10, 2023
概括
对豆蛋白缩物和分离物 (PPC和PPI) 的受控预烤提高了溶解性和乳化能力. 较短的烤时间增强了功能性质,但没有显著影响热特性.
科学领域:
- 食品科学 食品科学 食品科学
- 蛋白质化学 蛋白质化学
- 生物化学 生物化学
背景情况:
- 烤可以改变蛋白质的结构和功能.
- 豆蛋白缩物 (PPC) 和分离物 (PPI) 是有价值的食品成分.
- 了解烤对豆蛋白的影响对于成分优化至关重要.
研究的目的:
- 调查预烤对豆蛋白提取,结构和功能的影响.
- 为了确定最佳的烤前条件,以提高豆蛋白的特性.
- 为了评估溶解度,乳化和热性质的变化.
主要方法:
- 豆蛋白缩物和分离物在150°C下进行预烤,持续时间为10,20分钟和30分钟.
- 分析了提取效率,SDS-PAGE,二级和三级结构 (自由硫基,二硫化键,表面疏水性).
- 测量了溶解度,乳液能力指数 (EAI),乳液稳定性指数 (ESI) 和热性质 (变质温度,开始温度).
主要成果:
- 较短的时间 (10分钟和20分钟) 增加了PPC和PPI在pH7和PPI在pH3的溶解度.
- 较长的烤时间 (30分钟) 显著降低了PPC和PPI的提取效率.
- 三级结构发生了变化,证据是减少了硫基,增加了二硫化物键,以及更高的表面疏水性.
- EAI有所改善,而PPC的ESI下降,PPI没有受到影响.
- 较短的烤时间导致了内热峰值和变质和开始温度的轻微下降.
结论:
- 控制的预烤 (150°C,10-20分钟) 可以积极改变豆蛋白的三级结构.
- 这些修改在pH 7时增强了溶解度和乳化能力指数.
- 实现了功能性改进,同时在很大程度上保留了热性能.
- 预烤提供了一种可行的方法,用于为食品应用量身定制豆蛋白的功能.
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