"SGER: Merging Single Molecule Spectroscopy and Molecular Simulation".

“SGER：合并单分子光谱学和分子模拟”。

• 批准号: 0631631
• 负责人: Neal Woodbury
• 金额: $ 5万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-06-01 至 2007-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0631631&HistoricalAwards=false
• 关键词: SGER; Merging; Single; Molecule; Spectroscopy

This SGER project is designed to take the first steps in merging the single molecule nucleosome dynamics system developed by the PI Woodbury with a new approach to simulating the dynamics of large molecular systems on the millisecond and longer time scale. In general, single molecule fluorescence spectroscopy suffers from the lack of a solid theoretical approach to backing out fundamental physical parameters from observed dynamics. The nucleosome is a case in point. There are several recent publications from several laboratories showing that measurements of single molecule dynamics can be performed on nucleosomes. However, beyond a qualitative understanding of the range and frequency of motion, little can be concluded. What is needed is a theoretical model to predict stochastic single molecule dynamics based on structural and thermodynamic properties. By comparing experiment and simulation, the work in this project is designed to determine if it is possible to directly test the physical model, refining the key parameters. This project is jointly funded by the Division of Physics and the Division of Chemistry in the Mathematical and Physical Sciences Directorate and the Division of Molecular and Cellular Biosciences in the Directorate for Biological Sciences.

这个SGER项目旨在采取第一步，将PI伍德伯里开发的单分子核小体动力学系统与一种新的方法相结合，以模拟毫秒和更长时间尺度上的大分子系统的动力学。一般来说，单分子荧光光谱法缺乏坚实的理论方法来从观察到的动力学中恢复基本的物理参数。核小体就是一个很好的例子。最近有几个实验室的出版物表明，单分子动力学的测量可以在核小体上进行。然而，除了对运动范围和频率的定性理解之外，几乎没有什么可以得出结论。所需要的是一个理论模型来预测随机单分子动力学的基础上的结构和热力学性质。通过实验与仿真的对比，确定是否可以直接对物理模型进行测试，从而细化关键参数。该项目由数学和物理科学理事会物理学处和化学处以及生物科学理事会分子和细胞生物科学处共同资助。