半经验量子力学方法的应用,以准确估计生物系统中的联结结构:蛋白激酶案例研究
Charles-Alexandre Mattelaer1, Roberto Fino2, Christian Permann3,4
1Department of Chemistry, KU Leuven, Celestijnenlaan, 200F, Leuven 3001, Belgium.
Journal of chemical information and modeling
|January 13, 2026
概括
这项研究引入了用于药物发现的量子力学 (QM) 工作流,改善了对激酶的联结姿势预测. 虽然对类似药物的分子有效,但对碎片类化合物的准确性各不相同.
科学领域:
- 计算化学计算化学
- 结构生物学 结构生物学
- 药物发现 药物发现 药物发现
背景情况:
- 准确预测连接体结合位置对于合理的药物设计至关重要.
- 传统的对接方法往往缺乏复杂的蛋白质 - 连接体相互作用所需的准确性.
- 像CDK2,CK2,p38α和CAMK1DA这样的基因酶是重要的制药标.
研究的目的:
- 开发和验证基于量子力学 (QM) 的工作流程,用于增强连接体结合位估计.
- 评估QM工作流程的性能,使用半经验方法对药物相关的激酶进行评估.
- 将QM方法的准确性与传统的对接方法进行比较.
主要方法:
- 在QM/MM框架内集成基于xTB的对接与PM6-D3H4X复刻.
- 将工作流应用于涉及CDK2,CK2,p38α和CAMK1DA的蛋白质连接体复合体.
- 在各种受体结构中测试类似药物和类似碎片的配体.
主要成果:
- 基于QM的工作流成功地复制了类似药物分子的实验性联结体结合姿势.
- 碎片样联结体的性能不那么一致,这表明了潜在的限制.
- 该研究强调了QM方法对于特定的连接体类型和目标的稳定性.
结论:
- 基于QM的工作流提供了更高的准确性来预测酶标中的联结位.
- 需要进一步精细化,以提高具有弱相互作用的碎片类联结体的精度.
- 这种方法对推进基于结构的药物发现工作具有前景.
相关概念视频
Ligand Binding Sites
14.9K
Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
14.9K
The Equilibrium Binding Constant and Binding Strength
14.8K
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:
14.8K
Protein-Drug Binding: Determination Methods
611
Determining protein-drug binding can be achieved through indirect and direct methods, each providing valuable insights into the interaction between proteins and drugs.
Indirect methods involve isolating the bound drug from its free form in biological samples such as blood, serum, or plasma. These techniques aim to measure the percentage of drugs bound to proteins. Equilibrium dialysis is a commonly used method where the free drug concentration at equilibrium is measured by separating the bound...
Indirect methods involve isolating the bound drug from its free form in biological samples such as blood, serum, or plasma. These techniques aim to measure the percentage of drugs bound to proteins. Equilibrium dialysis is a commonly used method where the free drug concentration at equilibrium is measured by separating the bound...
611
Ligand Binding and Linkage
5.5K
Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked. In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence...
5.5K
Allosteric Proteins-ATCase
6.5K
Binding sites linkages can regulate a protein's function. For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
6.5K
Conserved Binding Sites
5.0K
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...
5.0K


