在水性甘氨酸的影响下,酶因键诱导的非线性尺寸依赖
Ivy Das Sarkar1, Arnab Sil2, Biswajit Guchhait2
1GITAM University, Visakhapatnam, Andhra Pradesh 530045, India.
The Journal of chemical physics
|March 19, 2025
概括
天然深层环氧溶剂 (NADESs) 不线性地影响蛋白质结构. 莱索酶是什么 莱索酶是什么
科学领域:
- 生物化学 生物化学
- 物理化学 物理化学
- 计算生物学 计算生物学
背景情况:
- 天然深层性溶剂 (NADES) 正在成为制药行业的可持续替代品.
- 在NADES中蛋白质的构造性行为,特别是水合的作用,仍然不完全理解.
- 酶的二次结构表现出水性甘油 (胆化物+甘油) 的非单调变化,含水量不同.
研究的目的:
- 为了研究水性甘氨酸中不同水度对lyszyme的结构稳定性的影响.
- 通过分子动力学模拟,阐明控制NADES中蛋白质行为的微观机制.
- 了解这些绿色溶剂中水分和蛋白质稳定性之间的非线性关系.
主要方法:
- 全原子分子动力学模拟液态甘氨酸中的酶在不同水重百分比 (wt.%) 的1微秒.
- 分析蛋白质结构性质,包括旋转半径 (Rg),根平均平方偏差 (RMSD),根平均平方波动 (RMSF),二次结构和溶剂可访问表面积 (SASA).
- 检查键网络 (蛋白内,蛋白DES,DES-DES,蛋白水,水水) 和辐射分布函数 (RDF).
主要成果:
- 模拟的Rg值质量地复制了实验观测结果,显示了最初的增加,在40%的水中达到峰值,然后下降.
- 蛋白质-蛋白质键变化与观察到的非线性形状变化相关.
- 由DES和水相互作用形成的微观结构被确定为蛋白质行为的关键决定因素,在不同的水分水平上有不同的相互作用.
结论:
- 这项研究提供了对水性甘氨酸中酶构成的微观理解,揭示了水化和溶剂相互作用之间的复杂相互作用.
- 在含水量低的情况下,强大的键网络限制了蛋白质;增加的水通过蛋白质-水相互作用促进扩张.
- 在高含水量时,DES成分,水和蛋白质之间的强相互作用导致蛋白质紧缩,解释了非线性Rg行为.
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