What governs protein adsorption and immobilization at a charged solid surface?

What governs protein adsorption and immobilization at a charged solid surface?
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什么控制蛋白质在带电固体表面的吸附和固定?

DOI:
10.1021/la101276v
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发表时间:
2010-06-01
期刊:
Langmuir : the ACS journal of surfaces and colloids
影响因子:
--
通讯作者:
Mulheran PA
Mulheran PA
中科院分区:
其他
文献类型:
--
作者:
Kubiak-Ossowska K;Mulheran PA

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采用全原子分子动力学模拟研究了蛋清溶菌酶在模型带电表面的吸附。模拟是在90 ns的时间尺度上进行的,这足以观察到吸附过程中的旋转和平移步骤。发现静电在引导蛋白质与N, c端对底物的有利结合方向中起关键作用。然而,完全固定似乎只能通过Arg128与表面的强相互作用来实现,这是由于蛋白在末端表面的柔韧性所促成的。这个残基的模拟突变证实了它的关键作用。这项工作表明,静电本身可能不足以指导开发利用蛋白质吸附和固定的材料系统。
The adsorption of hen egg white lysozyme at a model charged surface is studied using fully atomistic molecular dynamics simulations. The simulations are performed over a 90 ns time scale which is sufficient to observe rotational and translational steps in the adsorption process. Electrostatics is found to play a key role in guiding the protein to the favorable binding orientation with the N,C-terminal face against the substrate. However, full immobilization appears to only occur through the strong interaction of Arg128 with the surface, facilitated by the protein’s flexibility at the terminal face. Simulated mutation at this residue confirms its crucial role. This work demonstrates that electrostatics alone might not be sufficient to guide the development of material systems that exploit protein adsorption and immobilization.
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