调查硫胺 - 人类血清白蛋白相互作用:使用多光谱学,DFT计算和分子对接的综合方法
Mingguo Peng1, Yicui Wang2, Chunge Wu3
1School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China; School of Urban Construction, Changzhou University, Changzhou, 213164, China.
Biochemical and biophysical research communications
|October 20, 2023
概括
硫胺抗生素 (SAs) 与人血清白蛋白 (HSA) 结合,而硫素显示出最强的亲和力. 这种由各种力量驱动的相互作用发生在HSA的子域IB中,并且可以通过SA化学结构来预测.
科学领域:
- 环境化学环境化学
- 生物化学 生物化学
- 计算化学的计算化学
背景情况:
- 人们越来越担心硫胺抗生素 (SAs) 对环境和健康的影响.
- 人类血清白蛋白 (HSA) 是许多异生菌的主要结合蛋白,影响它们的分布和毒性.
研究的目的:
- 调查六个代表性的SA和HSA之间的相互作用机制和约束特征.
- 阐明SA-HSA相互作用的驱动力和结合点.
- 建立SA化学结构和它们与HSA的结合亲和关系之间的相关性.
主要方法:
- 多种光谱技术 (例如光光谱) 用于研究结合.
- 分子对接模拟用于预测结合模式和亲和力.
- 密度函数理论 (DFT) 计算来分析结构-活动关系.
主要成果:
- 所有六个SA都对HSA表现出显著的绑定,具有不同的绑定常量.
- 硫素 (SDX) 具有最高的结合亲和力 (-8.6 kcal/mol) 和结合常数 (7.18 × 10^5 L/mol).
- 相互作用主要由键,范德瓦尔斯力和疏水性相互作用介导,主要是在HSA子域IB.内.
- DFT分析显示,SA结构特征 (双描述符,电友福井函数) 和结合常数之间存在强烈的相关性.
结论:
- SAs与HSA的结合是复杂的,涉及多种相互作用力和特定的结合部位.
- SA的化学结构显著影响了它们与HSA的结合性能.
- 这些发现为评估硫胺抗生素的环境风险和生物影响提供了宝贵的见解.
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