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Protein WISDOM: A Workbench for In silico De novo Design of BioMolecules
Published on: July 25, 2013
关于非结合性S...O相互作用的定向性的统计和理论研究. 对分子设计和蛋白质工程的影响
Michio Iwaoka1, Shinya Takemoto, Shuji Tomoda
1Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan. iwaoka@selen.c.u-tokyo.ac.jp
Journal of the American Chemical Society
|August 29, 2002
概括
蛋白质中的硫氧相互作用因方向偏好而不同于小分子. 了解这些非结合性相互作用是蛋白质结构和分子设计的关键.
科学领域:
- 生物化学 生物化学
- 化学物理 化学物理
背景情况:
- 在蛋白质中观察到非结合硫-氧 (S...O) 相互作用.
- 在蛋白质中观察到的SO相互作用与小型有机化合物相比,表现出不同的方向偏好.
研究的目的:
- 为了研究蛋白质和小型有机分子之间的S...O相互作用方向倾向的差异.
- 阐明S...O相互作用的几何规律的因素.
主要方法:
- 在剑桥结构数据库 (CSD) 中对S...O相互作用进行全面搜索.
- 基于二甲基二硫化物和碳烯化合物模型复合物的MP2计算.
主要成果:
- 氧原子更喜欢从S-C或S-S键的背面 (sigma(S) 方向接近硫.
- 硫可以接近碳氧在平面内 (nO方向) 或在平面外 (piO方向).
- 对于S...O...amide) 相互作用来说,pi(O) 方向是首选的,这与蛋白质结构相一致.
结论:
- S...O 相互作用的结构特征受到碳基组的类型的影响.
- S...O 相互作用可能在控制蛋白质结构方面发挥作用.
- S...O 相互作用的定向性质为分子设计应用提供了潜力.
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