4 - 甲基子氨酸度对其与β-乳糖球蛋白的共价结合物的作用:结构和功能性质
Jinshun Ye1, Xiaotong Li1, Zhenzhao Weng1
1Engineering Research Center of Health Food Design & Nutrition Regulation, Dongguan Key Laboratory of Typical Food Precision Design, China National Light Industry Key Laboratory of Healthy Food Development and Nutrition Regulation, School of Life and Health Technology, Dongguan University of Technology, Dongguan 523808, China.
Food chemistry
|December 24, 2024
概括
这项研究表明,高度的4-甲基基 (4MBQ) 改善了β-乳球蛋白 (β-Lg) 结合物的抗氧化和乳化特性. 这些修改后的蛋白质为乳液提供了增强的稳定性,这表明它们有可能成为新型抗氧化剂乳剂.
科学领域:
- 食品科学与技术 食品科学与技术
- 蛋白质化学 蛋白质化学
- 生物化学 生化学
背景情况:
- β-乳糖球蛋白 (β-Lg) 是一种具有功能性质的主要乳清蛋白.
- 类,如4-甲基基类 (4MBQ),可以与蛋白质相互作用.
- 了解这些相互作用是开发改进食品成分的关键.
研究的目的:
- 为了研究不同度的4-甲基二 (4MBQ) 对β-乳糖球蛋白 (β-Lg) 的共价变异的影响.
- 评估β-Lg-4MBQ结合物的物理化学,结构和功能性质的变化.
- 评估这些新型结合物的抗氧化和乳化能力.
主要方法:
- 准备不同摩尔比率的β-Lg-4MBQ合物 (1:2, 1:1, 2:1的4MBQ到β-Lg醇).
- 使用测量聚,自由硫和氨基群含量进行表征.
- 通过光谱学分析二次结构 (α-螺旋,β-片).
- 评估表面的疏水性,乳化特性和抗氧化活性 (DPPH,ABTS测定).
- 对β-胡卜素乳液稳定性的评估.
主要成果:
- 较高的4MBQ度导致聚醇含量增加, β-Lg-4MBQ合物中的自由硫和氨基群减少.
- 结合改变了蛋白质结构,减少了α螺旋和增加了β片含量.
- β-Lg-4MBQ结合物,特别是在更高的4MBQ比率下,表现出增强的表面疏水性和乳化特性.
- 抗氧化剂活性随着4MBQ度的增加而显著增加.
- 由β-Lg-4MBQ-0.4稳定的β-胡卜素乳液显示出优越的稳定性.
结论:
- 用4MBQ对β-Lg的共价修饰有效地增强了它的抗氧化和乳化功能.
- 受到4MBQ度影响的修改程度与改善的功能性质直接相关.
- 这些发现表明β-Lg-4MBQ合物是开发食品应用中先进抗氧化剂乳化剂的有希望的候选者.
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