在能量表示理论中,溶解自由能量和溶解物-溶剂相互作用能量之间的相关性
Yutaka Maruyama1,2, Nobuyuki Matubayasi1,2
1Maruho Collaborative Project for Theoretical Pharmaceutics, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.
The journal of physical chemistry. B
|December 15, 2025
概括
能量表示 (ER) 理论通过将SFE与溶液-溶剂相互作用能量 (SSIE) 联系起来,简化了溶解自由能量 (SFE) 的计算. 这项研究证实了这种相关性的理论基础,增强了生物分子溶解分析.
科学领域:
- 计算化学是一种计算化学.
- 生物物理学的生物物理.
- 统计力学就是统计力学.
背景情况:
- 经典密度函数理论 (DFT) 提供了一个通过分子模拟计算溶解自由能量 (SFE) 的框架.
- 能量表示理论 (ER) 是一种DFT,它利用溶液-溶剂对能量分布函数来绕过中间状态模拟.
- 在ER计算中的实证观察表明,SFE和溶解物-溶剂相互作用能量 (SSIE) 之间存在强烈的相关性,特别是对于蛋白质.
研究的目的:
- 在ER框架内推导出SFE-SSIE相关性的理论基础,包括静电和范德瓦尔斯 (vdW) 贡献.
- 通过使用多种蛋白质构造,以数值的方式研究SFE,SSIE,其组件和排除体积之间的关系.
- 澄清ER理论在计算密集型系统中的生物分子溶解分析中的实用性.
主要方法:
- 使用能量表示 (ER) 理论用于计算溶解自由能量 (SFE).
- 分析的溶解物-溶剂相互作用能量 (SSIE),包括静电和范德瓦尔斯 (vdW) 组件.
- 检查了20个残留Trp蛋白的159个构造,以评估相关性.
主要成果:
- 在ER框架内为SFE-SSIE关系推导了1/2的理论系数.
- 发现,虽然VDW对SSIE的贡献比静电贡献小,但它们改善了类似形状的相关性.
- 证明SSIE的静电元件在一个参考点上是准确的,但多个参考点可以提高SSIE的整体准确性.
结论:
- 该研究阐明了ER理论中SFE-SSIE关系的理论基础.
- 这些发现强调了ER理论在分析生物分子溶解,特别是复杂系统的实际实用性.
- 在具有挑战性的生物分子系统中,ER理论为溶解自由能计算提供了一个计算效率高的替代方案.
更多相关视频
11:44Spin Saturation Transfer Difference NMR SSTD NMR: A New Tool to Obtain Kinetic Parameters of Chemical Exchange Processes
Published on: November 12, 2016
18.5K
07:18Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method
Published on: June 14, 2019
7.0K
相关概念视频
02:35Energetics of Solution Formation
7.3K
The formation of a solution is an example of a spontaneous process, which is a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Formation of the solution requires the solute–solute and solvent–solvent...
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Formation of the solution requires the solute–solute and solvent–solvent...
7.3K
02:21Chemical and Solubility Equilibria
4.8K
The free energy change associated with dissolving a solute in a liter of solvent is called the free energy of a solution, ΔGsolution. The overall ΔGsolution is expressed as the balance of ΔGinteraction against the always-favorable free-energy of mixing, ΔGmixing. Solution formation is favorable if ΔGsolution is less than zero, whereas it is unfavorable if ΔGsolution is greater than zero. In short, for a solution to form and complete dissolution to take place,...
4.8K
02:05Entropy and Solvation
8.2K
The process of surrounding a solute with solvent is called solvation. It involves evenly distributing the solute within the solvent. The rule of thumb for determining a solvent for a given compound is that like dissolves like. A good solvent has molecular characteristics similar to those of the compound to be dissolved. For example, polar solutions dissolve polar solutes, and apolar solvents dissolve apolar solutes. A polar solvent is a solvent that has a high dielectric constant (ϵ...
8.2K
03:00Solubility
20.8K
Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
20.8K
02:39Enthalpy of Solution
29.8K
There are two criteria that favor, but do not guarantee, the spontaneous formation of a solution:
29.8K
02:28Intermolecular Forces in Solutions
38.5K
The formation of a solution is an example of a spontaneous process, a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
38.5K