Effects of Non‐specific and Specific Solvation on Adsorption of BPTI on Au Surface: Insight from Molecular Dynamics Simulation

Effects of Non‐specific and Specific Solvation on Adsorption of BPTI on Au Surface: Insight from Molecular Dynamics Simulation
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非特异性和特异性溶剂化对 BPTI 在 Au 表面吸附的影响:来自分子动力学模拟的见解

DOI:
10.1063/1674-0068/26/05/558-568
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发表时间:
2013
影响因子:
1
通讯作者:
N. Zhao
N. Zhao
中科院分区:
化学4区
文献类型:
--
作者:
Wei Yang;Liyun Zhang;Meng;X. Pu;N. Zhao

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蛋白质在固体表面的吸附对许多自然过程至关重要。然而,特定水在影响吸附过程中的作用尚未得到很好的理解。采用分子动力学模拟研究了三种水环境(介电常数模型、部分溶剂化模型和完全溶剂化模型)下BPTI在Au表面的吸附。结果表明,在介质环境中会发生快速而强烈的吸附,导致明显的结构变化,与晶体结构有很大的偏差,沿Au表面大量扩散,所有二级结构的快速损失以及与表面接触的原子数量多。与介电模型相比,在部分溶剂化体系中,由于特定水层削弱了吸附效果,因此吸附速度较慢,上述计算性质的变化较小。然而,在部分溶剂化体系中,极性Au表面的吸附引起了显著的影响。
Proteins adsorption at solid surfaces are of paramount important for many natural processes. However, the role of specific water in influencing the adsorption process has not been well understood. We used molecular dynamics simulation to study the adsorption of BPTI on Au surface in three water environments (dielectric constant model, partial and full solvation models). The result shows that a fast and strong adsorption can occur in the dielectric environment, which leads to significant structure changes, as confirmed by great deviation from the crystal structure, largely spreading along the Au surface, rapid lose in all secondary structures and the great number of atoms in contact with the surface. Compared to the dielectric model, slower adsorption and fewer changes in the calculated properties above are observed in the partial solvation system since the specific water layer weakens the adsorption effects. However, in the partial solvation system, the adsorption of polar Au surface causes a significant ...
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