用集成的MetaD-US模拟来阐明药物向循环素依赖基因酶的选择性机制
Lingling Wang1,2, Shu Li1, Sutong Xiang2
1Centre for Artificial Intelligence Driven Drug Discovery, Faculty of Applied Sciences, Macao Polytechnic University, Macao 999078, China.
Journal of chemical information and modeling
|August 22, 2024
概括
SR4835选择性地向CDK12/13激酶,这对于癌症治疗至关重要. 一种创新的IMUS方法揭示了选择性来自于特定的H键稳定性和链区域内相互作用.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 循环素依赖激酶 (CDK),特别是CDK12和CDK13,是细胞循环和RNA聚合酶II活动的关键调节者.
- 这些CDK代表了各种癌症的重要治疗点,包括三阴性乳腺癌.
研究的目的:
- 阐明SR4835对CDK13/12/9.9的选择性抑制机制.
- 准确地描述药物标相互作用和结合自由能量.
主要方法:
- 开发和应用一种创新的增强采样方法:集成的温和元动力学样采样 (IMUS).
- IMUS结合了温和的元动力学 (WT-MetaD) 进行路径探索和雨采样,用于精确的自由能量计算.
- 药物标相互作用的结合自由能量和运动机制的分析.
主要成果:
- IMUS方法成功地描述了药物向相互作用过程和结合自由能量.
- 阐明了SR4835的选择性,主要是由于部区域H键稳定性的差异.
- 鉴定出了不同的蛋白质 - 配体相互作用模式是选择性的关键.
结论:
- 该研究成功阐明了SR4835对CDK家族成员的药物选择性机制.
- 这些发现强调了H键稳定性和相互作用模式在激酶抑制剂选择性中的关键作用.
- 综合性高温度元动力学采样 (IMUS) 方法已被验证为研究药物向相互作用的有效工具.
相关概念视频
Inhibition of Cdk Activity
4.7K
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
4.7K
Positive Regulator Molecules
5.4K
Mitotic cell division results in daughter cells that exactly resemble the parent cell. However, errors in the DNA replication or distribution of genetic material may lead to genetic mutations that may be passed down to every new cell formed from the resulting abnormal cell. Propagation of such mutant cells is restricted through checkpoint mechanisms present at different stages of the cell cycle. These checkpoints involve regulator molecules that either promote or demote cell cycle events.
5.4K
M-Cdk Drives Transition Into Mitosis
5.5K
Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
5.5K
Anaphase Promoting Complex
2.8K
The stepwise destruction of specific proteins is necessary for the progression and completion of the cell cycle. Such proteins are ubiquitinated by ubiquitin ligases and then subsequently destroyed by the proteasome. The SCF (Skp1/Cullin/F-box) and the anaphase-promoting complex (APC) are two important ubiquitin ligases involved in cell cycle progression. While SCF is active throughout the cell cycle, APC gets activated during metaphase to anaphase transition. Cdc20 or Cdh1 binds to APC and...
2.8K
The Cell Cycle Control System
2.7K
The cell cycle regulation directs how a cell proceeds from one phase to the next and begins mitosis. The cell cycle control system includes intracellular regulatory molecules and external triggers. They provide "stop" or "advance" signals and operate at specific cell cycle stages termed checkpoints to ensure that a particular process is completed before the cell advances to the next phase.
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and...
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and...
2.7K
Separation of Sister Chromatids
3.6K
At the transition from prophase to metaphase, there is a reduction in cohesion along the chromosomal arms, resulting in the resolution of sister chromatids. However, residual cohesin connections remain to hold the sister chromatids together until the transition from metaphase to anaphase. The residual connection prevents any premature separation of sister chromatids, blocking the risks of aneuploidy within the daughter cells.
At the onset of anaphase, separase, a proteolytic enzyme, is...
At the onset of anaphase, separase, a proteolytic enzyme, is...
3.6K


