Wiggle150:对高度紧张的合规器的密度功能和神经网络潜力的基准测试
Rebecca R Brew1, Ian A Nelson1, Meruyert Binayeva1
1Michigan State University, Lansing 48824, Michigan, United States.
Journal of chemical theory and computation
|April 11, 2025
概括
一个新的基准,Wiggle150,解决了评估应变分子几何学上的计算方法的需求. 它揭示了非平衡系统的AIMNet2等方法的强大性能.
科学领域:
- 计算化学的计算化学
- 量子化学 是一个量子化学.
- 方法开发 方法开发
背景情况:
- 现有的计算基准主要集中在平衡几何上.
- 这限制了对分子动力学和反应路径探索中至关重要的不平衡结构的方法的评估.
- 有需要的基准代表高度紧张的分子构造.
研究的目的:
- 介绍Wiggle150,一个新的基准,由150个高度紧张的分子构造组成.
- 评估各种计算方法的性能,以预测这些具有挑战性的几何体的相对能量.
- 确定适用于涉及不平衡分子结构的应用的方法.
主要方法:
- 使用元动力学生成了150个高度紧张的腺素,烯,和efavirenz的构造.
- 使用高级复合量子化学方法 (DLPNO-CCSD(T) /CBS) 计算的参考能量.
- 评估了各种计算方法:密度函数理论 (DFT),复合方法,半经验模型,神经网络潜力 (NNP) 和力场.
主要成果:
- 与现有基准相比,Wiggle150几何体在结构参数和相对能量上表现出明显更大的偏差.
- 多种计算方法表明Wiggle150集的速度准确性权衡有利.
- AIMNet2成为一个特别强大的神经网络潜力,用于预测应变形状的相对能量.
结论:
- Wiggle150作为一个有价值的工具,用于验证非平衡系统的计算协议.
- 该基准可以指导改进密度功能和神经网络潜力的开发.
- 这项工作促进了计算化学方法的准确性和稳定性评估.
相关概念视频
01:49Conserved Binding Sites
4.1K
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
4.1K
02:18The Equilibrium Binding Constant and Binding Strength
12.7K
The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
12.7K
02:18Conformations of Ethane and Propane
13.6K
In an organic molecule, free rotation about the carbon-carbon single bond results in energetically different conformers of the molecule. Due to this rotation, called the internal rotation, ethane has two major conformations — staggered and eclipsed.
Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered...
Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered...
13.6K
01:20Strain-Energy Density
327
Understanding the strain energy density in materials under axial load is crucial for evaluating their mechanical behavior and durability. When a rod is subjected to such a load, it elongates and stores energy, known as strain energy, as potential energy within the material. This energy is measured in terms of energy per unit volume.
In the elastic region of a material, the relationship between the stress and the strain is linear and follows Hooke's Law. The strain energy density in this...
In the elastic region of a material, the relationship between the stress and the strain is linear and follows Hooke's Law. The strain energy density in this...
327
02:11Conformations of Cyclohexane
12.0K
Cyclohexane does not exist in a planar form due to the high angle and torsional strain it would experience in the planar structure. Instead, it adopts non-planar chair and boat conformations.
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
12.0K
02:29Conformations of Cycloalkanes
11.4K
Adolf von Baeyer attempted to explain the instabilities of small and large cycloalkane rings using the concept of angle strain — the strain caused by the deviation of bond angles from the ideal 109.5° tetrahedral value for sp3 hybridized carbons. However, while cyclopropane and cyclobutane are strained, as expected from their highly compressed bond angles, cyclopentane is more strained than predicted, and cyclohexane is virtually strain-free. Hence, Baeyer’s theory that...
11.4K