对Gleevec和G6G的计算研究揭示了激酶抑制剂选择性的分子决定因素
Yen-Lin Lin1, Yilin Meng, Lei Huang
1Department of Biochemistry and Molecular Biology, Gordon Center for Integrative Science, The University of Chicago , 929 57th Street, Chicago, Illinois 60637, United States.
Journal of the American Chemical Society
|September 23, 2014
概括
激酶抑制剂G6G,与Gleevec不同,有效地准了Abl和c-Src激酶. 分子动力学模拟显示了G6G.
科学领域:
- 生物化学和分子生物学
- 药理学和药物发现
- 计算化学的计算化学
背景情况:
- 格利韦克可以选择性地抑制Abl氨酸激酶,但不能抑制c-Src,这是由于通过构造选择结合了不活跃的DFG-out构造.
- 激酶抑制剂G6G在结构上与Gleevec相似,抑制了Abl和c-Src,从而挑战了构造性选择假说.
- 格利韦克和G6G都与DFG-out形状结合,因此需要进一步研究结合选择性机制.
研究的目的:
- 阐明控制Gleevec和G6G对Abl和c-Src酶的差异性结合选择性的热力学贡献.
- 为了使G6G与Abl和c-Src的DFG-out conformation的结合与现有的酶抑制模型相协调.
- 调查特定分子相互作用和结构动态在确定激酶抑制剂选择性的作用.
主要方法:
- 用明确的溶剂分子进行分子动力学自由能量模拟.
- 对范德瓦尔斯分散相互作用和对抑制剂结合的固体效应的分析.
- 结合热力学比较Gleevec和G6G之间的结合热力学对Abl和c-Src酶.
主要成果:
- G6G通过其较大的 triazine 群体表现出有利的范德瓦尔斯相互作用,与 Gleevec 的胺基相比.
- 这些有利的G6G与c-Src结合的相互作用抵消了DFG-out构成的能量成本.
- 与Abl结合的G6G会因与酸盐结合环的固体碰撞而导致不利的自由能量损失,而c-Src中没有这种情况.
结论:
- G6G的结合选择性是由有利的范德瓦尔斯相互作用和不利的硬体碰撞的平衡决定的.
- Abl和c-Src之间的酸盐结合环形状的差异解释了G6G的独特结合行为.
- 该研究强调了在设计选择性激酶抑制剂时考虑特定的分子相互作用和结构灵活性的重要性.
相关概念视频
Combination Therapies and Personalized Medicine
4.9K
Combining two or more treatment methods increases the life span of cancer patients while reducing damage to vital organs or tissue from the overuse of a single treatment. Combination therapy also targets different cancer-inducing pathways, thus reducing the chances of developing resistance to treatment.
The combination of the drug acetazolamide and sulforaphane is a good example of combination therapy to treat cancer. The cells in the interior of a large tumor often die due to the hypoxic and...
The combination of the drug acetazolamide and sulforaphane is a good example of combination therapy to treat cancer. The cells in the interior of a large tumor often die due to the hypoxic and...
4.9K
Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase
80
Genetic polymorphisms in drug targets have emerged as critical determinants of interindividual variability in drug response and toxicity. Pharmacogenomic investigations increasingly focus on identifying these variations to personalize and optimize therapeutic interventions. A drug target may be a receptor, enzyme, or signaling protein involved in pharmacologic responses or disease-related pathways. While early pharmacogenetic studies focused primarily on drug metabolism, current research...
80
Targeted Cancer Therapies
7.0K
The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against...
There are several types of targeted therapies against...
7.0K
Protein-Drug Binding: Mechanism and Kinetics
2.0K
Protein-drug binding refers to the interaction between drugs and proteins within the body. This binding process can occur intracellularly, involving drug interactions with enzymes or receptors within cells, or extracellularly, involving plasma proteins in the blood.
Various forces drive these interactions, including hydrogen bonds, hydrophobic interactions, ionic bonds, electrostatic interactions, and van der Waals forces. These bonds enable drugs to bind to specific sites on proteins,...
Various forces drive these interactions, including hydrogen bonds, hydrophobic interactions, ionic bonds, electrostatic interactions, and van der Waals forces. These bonds enable drugs to bind to specific sites on proteins,...
2.0K


