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Design and Synthesis of a Reconfigurable DNA Accordion Rack
Published on: August 15, 2018
宿主层灵活性在DNA客体间隔中的作用,通过对分层纳米材料的计算机模拟揭示了这一点
Mary-Ann Thyveetil1, Peter V Coveney, H Christopher Greenwell
1Centre for Computational Science, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom.
Journal of the American Chemical Society
|August 30, 2008
概括
层状双氧化物 (LDHs) 的灵活性允许DNA周围的变形,从而影响间接分阶段. 分子动力学模拟显示,多马斯 - 赫罗德配置在LDH间层中促进了快速的DNA扩散.
科学领域:
- 材料科学 材料科学 材料科学
- 计算化学计算化学
- 生物材料科学 生物材料科学
背景情况:
- 层状双氧化物 (LDHs) 在间隔过程中表现出分阶段的中间结构.
- 形成这些分阶段结构的确切机制尚不清楚.
- 众所周知,材料的灵活性会影响间路径.
研究的目的:
- 为了研究在DNA插入Mg2Al LDHs时分阶段结构形成的机制.
- 探索和比较三个潜在的中间结构的能量差异.
- 为了确定在LDHs中DNA的首选的介质模型和扩散途径.
主要方法:
- 用分子动力学模拟来建模合过程.
- 在LDH中对堆叠,分层和层间DNA结构进行能量分析.
- 计算不同LDH配置中的DNA链的扩散系数 (Daumas-Herold,Rudorff,第一阶段).
- 基底间距变化的光谱分析,以确定运动模式.
主要成果:
- LDH 具有足够的灵活性,可以容纳像 DNA 这样的重间隔物.
- 与直接堆叠相比,在LDH中分层或分层DNA堆叠的潜在能量较低.
- 与鲁道夫和第一阶段模型相比,多马斯-赫罗尔德配置显示了DNA的平均扩散系数较高.
- 在多马斯-赫罗尔德结构中,表现出快速扩散的运动模式更为突出.
结论:
- LDH的灵活性在像DNA这样的大分子的合中起着至关重要的作用.
- 杜马斯-赫罗德模型提供了一个可行的机制,用于在LDH间层中进行分阶段的间隔和快速的DNA扩散.
- 模拟支持环静电运动作为一个关键因素,促进体积大的分子在分层材料中的扩散.
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