通过分子动力学模拟研究的碳纳米管诱导的原生酶的潜在功能变化
S Mehdi Vaez Allaei1,2,3, Mehriar Amininasab4, Hrachya Ishkhanyan5
1Department of Physics, University of Tehran, Tehran, 14395-547, Iran. smvaez@ut.ac.ir.
Scientific reports
|April 4, 2025
概括
碳纳米管 (CNTs) 与蛋白质,如酶相互作用. 对接模拟显示,当原生酶在对接后改变形状时,变质的酶与CNTs结合得更强.
科学领域:
- 生物材料科学 生物材料科学
- 纳米技术 纳米技术
- 计算生物学 计算生物学
背景情况:
- 碳纳米管 (CNTs) 可以影响生物系统,影响蛋白质功能,并可能导致毒性.
- 了解蛋白质-CNT相互作用对于评估纳米粒子安全性和应用至关重要.
研究的目的:
- 通过分子动力学模拟,研究溶酶与CNT的吸附和相互作用.
- 探索对接如何影响蛋白质-CNT复合体的形成和构造变化.
主要方法:
- 长尺度 (1-2μs) 分子动力学模拟.
- 对四个系统的检查:原生酶/CNT和变质的酶/CNT,在对接前和后.
- 对形状变化和结合相互作用的分析.
主要成果:
- 原生溶酶在初始CNT捕获时没有变化,但在对接后会发生变化.
- 变质的酶在接前和后的状态中表现出更强的结合CNTs.
- 关键的残留物 (氨酸,氨酸) 和相互作用 (π-π 堆叠,范德瓦尔斯) 驱动了溶酶在 CNT 上的吸附.
结论:
- 接显著影响模拟的蛋白质-纳米粒子相互作用,可能会改变关于纳米粒子毒性和功能的结论.
- 结合机制涉及多模式相互作用,主要是 π-π 堆叠和范德瓦尔斯力.
- 酶对CNT的构造反应取决于其原生或变质状态以及模拟的对接阶段.
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