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通过实验和分子模拟来复杂化和热稳定蛋白质-多电解质系统:多烯酸/溶酶案例

Sokratis N Tegopoulos¹, Sisem Ektirici², Vagelis Harmandaris^2,3,4

¹School of Applied Mathematical and Physical Sciences, National Technical University of Athens, GR-15772 Athens, Greece.

|August 14, 2025

概括

热处理通过改变分子相互作用和水合来稳定蛋白质多电解质纳米结构. 这项研究揭示了聚烯酸和酶复合物如何在加热时获得稳定性,这对于材料设计至关重要.

科学领域:

材料科学材料科学材料科学
生物技术是生物技术.
物理化学物理化学

背景情况:

蛋白质多电解质纳米结构在生物医学,组织工程和食品科学中至关重要.
了解这些纳米结构的分子间相互作用和环境影响 (pH,温度) 对它们的应用至关重要.
现有的知识差距阻碍了这些材料的合理设计和可预测的性能.

研究的目的:

在热处理下研究聚烯酸 (PAA) 和酶 (LYZ) 纳米网络的形成和稳定性.
阐明静电相互作用和热效应对纳米结构组装和稳定性的作用.
揭示了蛋白质多电解质复合物的稳定背后的微观机制.

主要方法:

实验技术的组合:静态和动态光散射 (SLS/DLS),FTIR,以及循环二元化 (CD).
在水溶液中对PAA-LYZ系统进行全原子分子动力学模拟.
在不同的pH和温度条件下分析纳米结构的形成,复杂化和稳定性.

主要成果:

PAA和LYZ的静电复合形成了在lyszyme的同电点以下的纳米粒子 (100-200 nm),在PAA/LYZ质量比为0.1.1的情况下形成最佳.
复合物在pH12下分解,但在热处理 (TT) 后保持稳定.
热处理诱导结构变化,增加LYZ-PAA接触并改变水分,从而增强复合体的稳定性,特别是在pH12时.

结论:

热处理是通过重组的结合模式和改变的水合,稳定蛋白质多电解质纳米结构的关键因素.
网络内的增强的聚合物链协会对复杂的稳定有显著的贡献.
这些发现为先进的蛋白质多电解质材料的合理设计提供了关键的见解,具有可调节的稳定性和响应性.

关键词:

原子信息是原子信息.光散射的光散射方式分子动力学模拟,分子动力学模拟蛋白质多电解质复合的复杂化热稳定热稳定热稳定

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