基于融合网格的CYP2C8-模板系统的构建和应用程序
Yasushi Yamazoe1, Yoshiya Yamamura2, Kouichi Yoshinari3
1Division of Drug Metabolism and Molecular Toxicology, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aramaki-Aoba, Aoba-ku, Sendai, 980-8578, Japan; Division of Risk Assessment, National Institute of Health Sciences, Tonomachi 3-25-26, Kawasaki-ku, Kawasaki, 210-9501, Japan.
Drug metabolism and pharmacokinetics
|April 12, 2024
概括
一个新的计算模型,模板,模拟了CYP2C8酶如何结合和代谢配体. 该系统使用触发残留启动的连接体运动,准确预测CYP2C8活性部位内的连接体相互作用.
科学领域:
- 生物化学 生物化学
- 计算化学计算化学
- 酶动力学 酶动力学
背景情况:
- 细胞染色体P450酶,特别是CYP2C8,在药物代谢中起着至关重要的作用.
- 了解CYP2C8活性部位内的联结体相互作用对于预测药物的疗效和毒性至关重要.
- 现有的模型可能无法完全捕捉连接体结合和酶介导反应的动态性质.
研究的目的:
- 开发一种新的计算系统来评估由CYP2C8介导的新陈代谢.
- 使用基于网格的模板,模拟CYP2C8活性部位内的联体可访问空间.
- 通过触发器-残留物启动的运动来研究连接体结合和稳定机制.
主要方法:
- 使用连接体结构数据,重新构建CYP2C8活性部位作为基于化的网格模板.
- 开发一个评估系统,包括触发器残留启动的连接体运动和固定.
- 模拟实验将模板数据与实验结果进行比较,用于350多个CYP2C8配体反应.
主要成果:
- 该模板成功模拟了CYP2C8活性位点中的联体可访问空间.
- 提出了CYP2C8-连接物相互作用的统一机制,涉及与后壁的同时多重接触.
- 在触发残留物启动运动后,通过与面部壁和特定边界的接触观察到连接物稳定.
- 该系统准确地预测了350多个CYP2C8配体反应.
结论:
- 开发的模板系统为研究CYP2C8媒介代谢提供了一个强大的平台.
- 触发残留物启动的连接体运动是稳定连接体和启动CYP2C8反应的关键因素.
- 这些发现提供了对CYP2C8酶-配体动态和相互作用的更深入的理解.
相关概念视频
01:27Pharmacogenetics of Drug Metabolism: Overview
Genetic polymorphism in drug metabolism is crucial to the inter-individual variability observed in drug responses. Drug metabolism primarily involves the chemical modification of drugs and other xenobiotics to enhance their elimination by increasing their polarity. Two main classes of enzymes mediate this biotransformation process: Phase I enzymes, primarily cytochrome P450s, catalyze oxidation and reduction reactions, while other enzymes, such as esterases, mediate hydrolysis, and Phase II...
01:28Pharmacogenetics of Phase I Enzymes: Cytochrome P450 Isozymes
Cytochrome P450 (CYP450) enzymes are a superfamily of heme-containing monooxygenases that play a pivotal role in Phase I drug metabolism by catalyzing oxidation and reduction reactions.These enzymes transform lipophilic xenobiotics into more hydrophilic metabolites, facilitating subsequent Phase II conjugation and eventual excretion. The CYP450 family is classified into families (e.g., CYP1–CYP3) and subfamilies (e.g., CYP2A, CYP2C), based on amino acid sequence homology.CYP450 isoenzymes,...