在冷储存下揭示了质大聚合物的结构和物理化学特性:对实验和分子动力学模拟的研究
Jinpeng Zhang1, Mingcong Fan1, Li Wang1
1State Key Laboratory of Food Science and Resources, School of Food Science and Technology, National Engineering Research Center for Functional Food, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China.
Food research international (Ottawa, Ont.)
|November 27, 2024
概括
冷会削弱冷面团中的谷氨酸宏聚合物 (GMP) 结构,但它对短期存储有耐受性. 蛋白质结构和水结合发生变化,表明逐渐恶化.
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
- 材料科学 材料科学 材料科学
背景情况:
- 谷氨宏聚合物 (GMP) 对于小麦质的功能至关重要,特别是在冷面团中.
- 结对GMP结构和特性的影响尚未完全理解.
研究的目的:
- 调查冷储存期间GMP的结构和物理化学变化.
- 为了评估GMP对冷条件的耐受性.
主要方法:
- 实验方法包括SDS-PAGE,光谱学和水结合分析.
- 生物信息算法和分子动力学模拟.
主要成果:
- 冷处理导致结构减弱,表面疏水性增加,并改变了二次结构 (α-螺旋到β-转/随机线圈).
- 脱聚合发生在70.0kDa以上,醇和二硫化物键略有变化.
- 键和疏水相互作用是GMP恶化的关键指标,导致蛋白质网络展开和水结合的变化.
结论:
- GMP对短期冷存储具有一定耐受性,但长期冷会导致结构降解.
- 蛋白质结构的变化,水相互作用和粘弹性属性是冷后评估GMP质量的重要标记.
相关概念视频
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01:08Molecular Weight of Step-Growth Polymers
Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
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As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...