设计内在无序的蛋白质,这些蛋白质在较低的临界溶液温度下经历相变
Xiangze Zeng1, Chengwen Liu2, Martin J Fossat1
1Department of Biomedical Engineering and Center for Science & Engineering of Living Systems (CSELS), Washington University in St. Louis, St. Louis, MO 63130, USA.
概括
研究人员设计了具有特定热响应行为的新型内在无序蛋白 (IDP) 序列. 使用蒙特卡洛模拟和遗传算法,他们成功地创建了表现出较低临界溶液温度 (LCST) 阶段行为的IDP.
科学领域:
- 蛋白质科学是一种蛋白质科学.
- 计算生物物理学的计算生物物理.
- 材料科学是一种材料科学.
背景情况:
- 自然存在的弹性体通常是表现出热响应阶段行为的内在无序蛋白质 (IDP).
- IDPs可以显示较低的临界溶液温度 (LCST) 或较高的临界溶液温度 (UCST) 阶段行为.
- 在IDP中,线圈-球体过渡的甲温度与LCST/UCST值相关,这表明了序列设计的潜力.
研究的目的:
- 开发一种用于设计具有可预测热响应相位行为的IDP序列的方法.
- 利用计算模拟来指导新型IDP的设计.
- 为了证明 IDP 序列的创建表现出特定的 LCST 阶段行为.
主要方法:
- 在ABSINTH模型的内在溶解 (IS) 极限中使用蒙特卡洛模拟 (通过隐性,新型,可调的哈密尔顿式研究的生物分子的自组装).
- 开发了一个启发式来区分LCST和UCST阶段行为.
- 一个遗传算法与IS极限模拟集成,用于序列设计.
- 可极化AMOEBA (原子多极优化能量用于生物分子应用) 力场被用于自由能量计算.
- 使用线圈球体过渡概况和高斯集群理论来验证设计的序列.
主要成果:
- 一个计算启发式有效区分LCST和UCST阶段行为在IDPs.
- 新的IDP序列成功地设计了有针对性的LCST阶段行为.
- 验证证实了设计的IDP的预测LCST阶段行为.
结论:
- 计算方法,包括ABSINTH和遗传算法,对于设计具有特定热响应性质的IDP是有效的.
- 开发的启发式提供了一个有价值的工具,用于预测和控制IDP阶段行为.
- 这项工作为需要可调节的热敏材料的应用程序创建定制的IDP打开了道路.
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