尺寸依赖的富勒伦可增强l-氨酸的相互作用:一种联合的DFT和MD模拟方法
Sourav Kanti Jana1, Narayan N Som2, Prafulla K Jha1
1Department of Physics, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat 39002, India.
Langmuir : the ACS journal of surfaces and colloids
|June 25, 2024
概括
像C24和C36这样的较小富勒伦与l-leucine具有强烈的相互作用,这使得它们对生物传感器具有前景. 这些基于富勒的传感器对于检测糖尿病 (MSUD) 中的l-leucine至关重要.
科学领域:
- 纳米材料科学 科学 纳米材料科学
- 计算化学计算化学
- 生物医学工程 生物医学工程
背景情况:
- 基于富勒烯的生物传感器利用独特的电子特性从氨基酸中传输信号.
- 糖尿病 (MSUD) 需要对l-leucine进行敏感检测,因为它在高水平上具有毒性.
- 精确的l-氨酸检测对于婴儿MSUD的管理至关重要.
研究的目的:
- 研究尺寸可变富勒伦 (C24,C36,C50,C70) 和l-氨酸 (LEU) 之间的相互作用.
- 评估烯衍生物作为生物传感器的潜力,以检测l-氨酸.
- 探索基于富勒的应用,从生物系统中分离l-leucine.
主要方法:
- 用密度函数理论 (DFT-D3) 的计算来研究富勒烯-l-氨酸的相互作用.
- 经典分子动力学 (MD) 模拟与一个明确的水模型在310 K进行.
- 分析包括自然键序 (NBO),穆利肯电荷,分子中的原子量子理论 (QTAIM) 和减少密度梯度 (RDG).
主要成果:
- 在气相中,C24烯对l-leucine表现出最高的亲和力.
- 较小的富勒伦 (C24和C36) 由于曲率较高,在水性环境中与l-氨酸的相互作用更强.
- 对于C24和C36与l-氨酸的结合自由能达到-24.946 kJ/mol,表明具有显著的结合潜力.
结论:
- 较小的富勒伦 (C24,C36) 与较大的变体相比,显示出作为l-氨酸传感器的优越潜力.
- 计算的恢复时间表明,从生物样本中分离l-leucine的应用是可行的.
- 计算分析证实了l-leucine和富勒伦之间的相互作用机制,支持它们的传感器功能.
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