差分酶化水解:对其对大豆蛋白结构,功能和大豆奶粉特性影响的研究
Qian Li1, Baoyue Chang2, Guo Huang2
1Heilongjiang Green Food Science Research Institute, Harbin 150028, China.
Foods (Basel, Switzerland)
|March 13, 2025
概括
使用六种酶对大豆蛋白分离物 (SPI) 的酶性水解改善了其功能性质和抗氧化能力. 酸盐表现出最大的影响,增强SPI功能和大豆奶粉溶解度,但对味道产生负面影响.
科学领域:
- 食品科学 食品科学 食品科学
- 生物化学 生物化学
- 蛋白质化学 蛋白质化学
背景情况:
- 大豆蛋白分离物 (SPI) 是大豆产品的关键成分,其特性影响大豆奶粉的特性.
- 了解蛋白质修饰对于优化大豆食品功能至关重要.
研究的目的:
- 调查酶化水解对大豆蛋白分离物 (SPI) 的结构和功能性质的影响.
- 评估酶化水解对大豆奶粉物理化学性质的影响.
- 为了比较六种商业酶 (勃洛美林,中性酶,帕帕因,素,风味酶和酶) 在修改SPI.效率.
主要方法:
- 使用六种不同的商业酶进行SPI的酶性水解.
- 分析结构变化,包括蛋白质展开,疏水性残留物的暴露,以及二次结构的变化 (α-螺旋,β-sheet到β-turn,随机线圈).
- 功能性质的评估:可溶性,乳化,发泡和抗氧化活性. 改性大豆奶粉的物理化学分析.
主要成果:
- 酶表现出明显的水解特异性,其中酸盐显示出水解的最高程度.
- 水解导致了蛋白质的展开,增加了自由硫的含量,以及从α-螺旋/β-片到β-转/随机线圈的结构转变.
- 增强的溶解性,乳化和发泡活动,以及显著增强的SPI的抗氧化特性 (p <0.05).
- 减少颗粒大小和提高大豆奶粉的溶解性,但对乳化和泡稳定性产生不利影响.
- 酸盐显著改善了SPI功能和大豆奶粉溶解度,但由于广泛的特异性,对味道产生了负面影响.
结论:
- 酶性水解有效地修改SPI,增强其功能和抗氧化特性.
- 酸盐在改善SPI功能和大豆奶粉溶解度方面非常有效.
- 酶处理,特别是用酸盐,可能会对大豆奶粉中乳化/泡的风味特征和稳定性产生负面影响.
相关概念视频
01:15Hydrolysis
103.9K
Overview
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
103.9K
01:28Protein Denaturation
3.7K
The function of proteins depends on their native three-dimensional structure, which is dictated by the amino acid sequence of the specific protein. Folding of the polypeptide chain takes place under specific conditions that energetically favor the folded conformation. In contrast, protein denaturation occurs spontaneously under unfavorable conditions that disrupt the integrity of the folded conformation. Thus, the chemical and physical environment of a protein, such as significant changes in pH...
3.7K
02:15Protein and Protein Structure
77.8K
Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme...
A protein's shape is critical to its function. For example, an enzyme...
77.8K