表面包装决定了在黄金上被吸附的细胞染色体c的氧化还原电位转移
Laura Zanetti-Polzi1, Isabella Daidone, Carlo Augusto Bortolotti
1Center S3, CNR NANO, Institute of Nanoscience , Via Campi 213/A, 41125, Modena, Italy.
Journal of the American Chemical Society
|September 4, 2014
概括
原子模拟揭示了与黄金表面结合时,iso-1-cytochrome c的特性如何发生变化. 表面度会影响由于环境极化性的减少潜力,影响蛋白质动态.
科学领域:
- 生物物理化学 生物物理化学
- 计算生物学 计算生物学
- 表面科学是一门学科.
背景情况:
- 细胞染色体c是电子转移中的关键蛋白质.
- 了解表面上的蛋白质行为对于生物传感器的发展至关重要.
- 之前的研究发现了自由扩散的细胞染色体c中的动态空洞.
研究的目的:
- 在黄金表面上研究异构-1-细胞染色体c的热力学和动态性质.
- 为了阐明表面度对蛋白质减少潜力的影响.
- 分析蛋白质动态中的表面诱导的修饰.
主要方法:
- 采用了大规模的原子学模拟.
- 计算了各种表面度的降低潜力.
- 对吸附的细胞染色体c进行了结构分析.
主要成果:
- 模拟的减少潜力与实验数据一致.
- 减少潜力的表面度的依赖性与环境极化性 (拥挤效应) 有关.
- 黄金的吸附使细胞染色体c中的动态腔变形,改变了它的行为.
结论:
- 表面结合显著影响细胞染色体c的热力学和动态性质.
- 环境的极化性在表面度依赖的减少潜力中起着关键作用.
- 动态腔中的表面诱导的形状变化可以改变蛋白质的功能.
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