DiffDec:具有端到端扩散模型的结构意识的脚手架装饰
Junjie Xie1,2, Sheng Chen1,2, Jinping Lei3
1School of Computer Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China.
Journal of chemical information and modeling
|January 24, 2024
概括
DiffDec通过使用3D口袋约束来装饰脚手架以结构意识的R组来增强分子优化. 与现有方法相比,这种新的扩散技术改善了R组生成和结合亲和力.
科学领域:
- 计算化学是一种计算化学.
- 药物发现 药物发现
- 分子建模分子建模
背景情况:
- R组装饰是分子优化中的一个关键策略.
- 目前用于R组生成的深度生成模型往往忽略了目标结构信息.
- 需要采用整合3D口袋约束的方法,以实现更有效的分子优化.
研究的目的:
- 介绍DiffDec,一种使用3D口袋约束的分子支架装饰的新方法.
- 为了实现端到端生成不同大小的R组,使用假原子机制.
- 提高R组生成的精度和效率,以实现分子优化.
主要方法:
- 使用修改后的扩散技术将3D口袋信息纳入.
- 开发了一个假原子机制,用于生成不同大小的R组.
- 实现自动或用户定义的增长定位用于R组放置.
主要成果:
- DiffDec 证明了产生具有结构意识的 R 组,具有现实的几何子结构的能力.
- 与竞争方法相比,实现了显著更高的R组恢复率 (69.67%单一,45.34%多重).
- 在分子对接研究中,装饰的分子显示出改善的平均结合亲和力和与目标口袋的有利相互作用.
结论:
- DiffDec有效地将3D口袋约束集成到R组装饰中,以实现分子优化.
- 该方法在R组生成中提供了卓越的性能,并导致增强的结合亲和力.
- 在药物发现和分子设计中,DiffDec显示出了实际应用的巨大潜力.
相关概念视频
Diffusion
Diffusion is the passive movement of substances down their concentration gradients—requiring no expenditure of cellular energy. Substances, such as molecules or ions, diffuse from an area of high concentration to an area of low concentration in the cytosol or across membranes. Eventually, the concentration will even out, with the substance moving randomly but causing no net change in concentration. Such a state is called dynamic equilibrium, which is essential for maintaining overall...
Protein Diffusion in the Membrane
Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...
Theories of Dissolution: Diffusion Layer Model
Dissolution, the process by which drug particles dissolve in a solvent, is explained by the diffusion layer model, a theoretical framework that simulates the absorption of oral drugs and allows us to analyze experimental data.
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...


