Understanding diffusion of intrinsically disordered proteins in polymer solutions: A disorder plus collapse model

Understanding diffusion of intrinsically disordered proteins in polymer solutions: A disorder plus collapse model
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了解聚合物溶液中本质无序蛋白质的扩散:无序加崩溃模型

DOI:
10.1063/1.5002710
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发表时间:
2017-11
期刊:
影响因子:
1.6
通讯作者:
Nanrong Zhao
Nanrong Zhao
中科院分区:
材料科学4区
文献类型:
--
作者:
Juan Wang;Yukun Bian;Xiuli Cao;Nanrong Zhao

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了解内在无序蛋白(IDPs)在拥挤环境下的扩散对生物系统中相关动力学建模具有普遍的重要性。在本工作中,我们提出了一个理论框架来研究IDPs在聚合物溶液中的扩散行为。将IDP建模为具有大范围旋转半径的粒子系综,服从Flory-Fisk分布,其中考虑了聚合物拥挤导致IDP收缩的坍塌效应。IDP的扩散系数计算为粒子样品值的平均值,记为< D >。通过适当地结合纳米粒子(NP)在聚合物溶液中的扩散系数的尺度关系,我们可以直观地评估< D >,并明确地揭示IDP扩散的无序和崩溃效应。特别注意的是比较了扩散系数的IDP和NP。结果表明,两者的不和谐…
Understanding diffusion of intrinsically disordered proteins (IDPs) under crowded environments is of ubiquitous importance to modelling related dynamics in biological systems. In the present work, we proposed a theoretical framework to study the diffusion behavior of IDPs in polymer solutions. IDP is modeled as an ensemble of particles with a wide range of gyration radius subject to Flory-Fisk distribution, where the collapse effect which leads to the shrink of IDP due to polymer crowding is included. The diffusion coefficient of IDP is calculated as the average, denoted by 〈D〉, over the values of the particle samples. By properly incorporating the scaling relations for diffusion coefficient of nanoparticle (NP) in polymer solutions, we are able to evaluate 〈D〉 straightforwardly and reveal the disorder and collapse effects on IDP’s diffusion in an explicit manner. Particular attentions are paid on comparison between the diffusion coefficient of an IDP and that of a NP. Results demonstrate that both disord...
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发表时间: 2014-10
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