Zúñiga-Bustos Matías, Galaz-Araya Constanza, Poblete Horacio
Instituto Universitario de Investigación y Desarrollo Tecnológico, Universidad Tecnológica Metropolitana, Santiago, Chile.
Doctorado en Ciencias mención Modelado de Sistemas Químicos y Biológicos, Facultad de Ingeniería, Universidad de Talca, Talca 3465548, Chile.
Phys Chem Chem Phys. 2025 Jan 2;27(2):1187-1196. doi: 10.1039/d4cp03275f.
Nanomaterials, specifically silver nanoparticles (AgNPs), have demonstrated great potential in biomedical applications due to their unique properties, such as antimicrobial activity and conductivity. One promising strategy to improve their biocompatibility and functional specificity is through the functionalization of AgNPs with peptides. By attaching peptides to the surface of AgNPs, their interaction with biological systems can be enhanced and tailored for specific applications. This computational study uses classical molecular dynamics and enhancement sampling techniques to investigate the interaction between AgNPs and RADA16-I peptides, as well as their derivative CLKRADA16-I. It utilizes classical molecular dynamics and enhanced sampling methods to gain insights into the structural information and details of their interaction. Furthermore, this study addresses the need for a better understanding of the interaction between composite materials made of nanoparticles and peptides. Our results demonstrate that the incorporation of the CLK motif significantly augments both structural stability and the binding affinity of peptides to silver nanoparticles. Through computational simulations, we observed that peptides modified with the CLK motif (CLKRADA16-I) exhibit a higher binding affinity toward a silver surface model, with the adsorption energy increasing by up to 4.2 kcal mol relative to unmodified peptides. This calculated interaction energy boosts adsorption and surface coverage, facilitating a packed and more effective peptide coating on the silver nanoparticles. These findings pave the way for the advancement of AgNPs as versatile agents in nanomedicine, particularly necessitating precise molecular recognition and robust bioactive scaffolding. Our study enhances the understanding of nanoparticle-peptide conjugates and their implications for designing next-generation nanomaterials.
纳米材料，特别是银纳米颗粒（AgNPs），由于其独特的性质，如抗菌活性和导电性，在生物医学应用中已展现出巨大潜力。一种提高其生物相容性和功能特异性的有前景策略是通过用肽对AgNPs进行功能化修饰。通过将肽连接到AgNPs表面，可以增强它们与生物系统的相互作用，并针对特定应用进行定制。这项计算研究使用经典分子动力学和增强采样技术来研究AgNPs与RADA16 - I肽及其衍生物CLKRADA16 - I之间的相互作用。它利用经典分子动力学和增强采样方法来深入了解其结构信息及其相互作用的细节。此外，本研究满足了更好地理解由纳米颗粒和肽制成的复合材料之间相互作用的需求。我们的结果表明，CLK基序的引入显著增强了肽对银纳米颗粒的结构稳定性和结合亲和力。通过计算模拟，我们观察到用CLK基序修饰的肽（CLKRADA16 - I）对银表面模型表现出更高的结合亲和力，相对于未修饰的肽，吸附能增加高达4.2千卡/摩尔。这种计算出的相互作用能促进了吸附和表面覆盖，有助于在银纳米颗粒上形成紧密且更有效的肽涂层。这些发现为AgNPs作为纳米医学中的多功能剂的发展铺平了道路，特别是需要精确的分子识别和强大的生物活性支架。我们的研究增进了对纳米颗粒 - 肽缀合物及其对设计下一代纳米材料的影响的理解。
