解码CHIKV nsP2蛋白酶的pH依赖性结构动态:从计算抗病毒向的洞察力
Rubha Shri Gurunathan1, Abhirami Rajaram1, Selvaraj Chandrabose2
1Computer Aided Drug Design and Molecular Modeling Lab, Department of Bioinformatics, Alagappa University, Karaikudi, Tamil Nadu, 630002, India.
Molecular diversity
|September 16, 2025
概括
这项研究揭示了 pH 如何影响 Chikungunya 病毒 nsP2 蛋白酶结构和抑制剂结合. 了解这些依赖pH的动态是设计有弹性的抗病毒药物的关键.
科学领域:
- 病毒学 病毒学
- 结构生物学 结构生物学
- 计算化学计算化学
背景情况:
- 奇孔古尼亚病毒 (CHIKV) 引起发烧,其非结构蛋白2 (nsP2) 对病毒复制和免疫逃避至关重要.
- 病毒蛋白酶的活性和稳定性对环境pH值敏感,影响药物的疗效.
- CHIKV nsP2 结合了RNA酶和囊蛋白酶的功能,使其成为抗病毒开发的目标.
研究的目的:
- 为了研究不同pH条件对 Chikungunya 病毒 nsP2 蛋白酶的结构灵活性和动态的影响.
- 评估pH值如何影响CHIKV nsP2蛋白酶与囊蛋白酶抑制剂E-64和乐皮的结合相互作用.
主要方法:
- 在CHIKV nsP2蛋白酶的Apo和Holo形式上进行了广泛的分子动力学 (MD) 模拟.
- 用分子对接来评估不同pH条件下的抑制剂结合亲缘关系.
- 分析包括根平均平方偏差 (RMSD),根平均平方波动 (RMSF),旋转半径和键计数.
主要成果:
- MD模拟显示nsP2活性位点和形状重组的pH依赖的变化.
- 催化二残留物 (Cys1013,His1083) 在不同的pH值下表现出显著的变化.
- 抑制剂的结合稳定性因pH而异,在循环和β链区域观察到显著波动.
- 在pH值为7和8时,β2链转化为循环,可能会影响基质的识别和活性.
结论:
- 在的发现为CHIKV nsP2蛋白酶的pH依赖的动态行为提供了关键的见解.
- 这项研究提出了设计抗pH弹性抗病毒抑制剂在各种生理条件中有效的策略.
- 了解pH诱导的结构变化对于开发强大的CHIKV疗法至关重要.
关键词:
奇孔古尼亚病毒病毒.囊蛋白酶抑制剂 囊蛋白酶抑制剂E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-64 E-65 E-64 E-64 E-65 E-65 E-64 E-65 E-64 E-65 E-65 E-65 E-65 E-65 E-66 E-65 E-65 E-66希斯蒂丁因 (Histidine) 是一种氨酸.nsP2蛋白酶的使用方法
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