基替代物对双甲化合物的影响与人血清白蛋白的相互作用:从光谱技术和计算机模拟中探索
Huan Zhang1, Ruirui Cai2, Chaolan Chen2
1School of Life Sciences, Nanchang University, Nanchang 330031, China.
International journal of molecular sciences
|September 9, 2023
概括
化双乙醇A (BPA) 化合物,四博双乙醇A (TBBPA) 和四双乙醇A (TCBPA),与人体血清白蛋白 (HSA) 结合. 由于疏水性相互作用,TBBPA表现出更高的亲和力,影响HSA结构.
科学领域:
- 生物化学 生物化学
- 毒理学 毒理学 毒理学
- 分子相互作用 分子相互作用
背景情况:
- 双A (BPA) 是一种内分泌干扰化合物,对人类健康有重大影响.
- 了解BPA及其衍生物与载体蛋白,如人血清白蛋白 (HSA) 的结合机制,对于评估它们的毒理影响至关重要.
- 在BPA上进行素替代可以改变其特性和生物活性.
研究的目的:
- 研究基替代双A化合物,特别是四博双A (TBBPA) 和四博A (TCBPA) 与人血清白蛋白 (HSA) 之间的相互作用.
- 阐明结合机制,亲缘关系以及素替代剂在这些相互作用中的作用.
- 确定TBBPA和TCBPA结合对HSA的二次结构的影响.
主要方法:
- TBBPA和TCBPA与HSA的结合的特征.
- 亲和分析用于比较TBBPA和TCBPA与HSA的结合强度.
- 确定关键的氨基酸残留物,参与结合过程.
- 在TBBPA/TCBPA复合体形成时,HSA二次结构的变化评估.
主要成果:
- TBBPA和TCBPA自发地与HSA在I位点形成稳定的二元复合体.
- 与TCBPA相比,TBBPA对HSA具有更高的结合亲和力.
- 疏水性相互作用是TBBPA-HSA复合体形成的主要驱动力,而键和范德瓦尔斯力对TCBPA-HSA至关重要.
- TBBPA/TCBPA的结合改变了HSA的二次结构.
- 特定的氨基酸残留物 (Lys199,Lys195,Phe211,Arg218,His242,Leu481,Trp214) 被确定为关键的结合相互作用.
结论:
- 素替代剂显著影响BPA化合物与HSA的结合亲和力和结合机制.
- TBBPA的较高亲和力归因于其素替代剂对负电荷表面积的影响以及疏水相互作用的优势.
- 这些化BPA的结合可以诱导HSA的结构变化,可能影响其功能.
- 化通常有助于BPA化合物与HSA结合.
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