Theory of single-molecule biophysics

单分子生物物理学理论

• 批准号: 8349700
• 负责人: Gerhard Hummer
• 金额: $ 6.64万
• 依托单位: NATIONAL INSTITUTE OF DIABETES AND DIGESTIVE AND KIDNEY DISEASES
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/8349700
• 关键词: Biophysics; Collaborations; Development; Diffusion; Free Energy; Goals; Individual; Kinetics; Modeling; Molecular; National Institute of Diabetes and Digestive and Kidney Diseases; Nucleic Acids; Process; Proteins; Reaction; Rupture; Spectrum Analysis; Structure; Surface; System; Thermodynamics; Time; United States National Institutes of Health; Work; interest; novel; research study; response; single molecule; theories

In single-molecule experiments forces can be exerted directly on individual molecules and their response can be followed as a function of time. These experiments reveal fundamentally novel and unique information on the structure, dynamics, and interactions of individual biomolecules. In collaboration with Dr. Szabo (NIDDK, NIH), we have continued our development of formalisms to extract accurate kinetic and thermodynamic information from single-molecule force spectroscopy experiments. We could show how system free energies can be transformed into the underlying molecular free energy surface, which is the quantity of interest (1). As part of this work, we also developed a theoretical description of the kinetics of rupture under force in a framework similar to a reaction-diffusion model. 1. G. Hummer, A. Szabo, Free energy profiles from single-molecule pulling experiments, Proc. Natl. Acad. Sci. USA 107, 21441-21446 (2010).

在单分子实验中，力可以直接施加在单个分子上，并且它们的响应可以作为时间的函数。这些实验从根本上揭示了关于单个生物分子的结构、动力学和相互作用的新颖和独特的信息。 在与Szabo博士（NIDDK，NIH）的合作中，我们继续开发形式主义，以从单分子力谱实验中提取准确的动力学和热力学信息。我们可以展示如何将系统自由能转换为潜在的分子自由能表面，这是感兴趣的量（1）。 作为这项工作的一部分，我们还开发了一个类似于反应扩散模型的框架下的力的断裂动力学的理论描述。 1. G.悍马，A。Szabo，单分子拉伸实验的自由能分布，Proc. Natl. Acad. Sci. USA 107，21441-21446（2010）。