论文部分内容阅读
在模拟人生理条件下,综合利用荧光光谱、圆二色谱和分子模拟等方法,研究姜黄素及其衍生物去甲氧基姜黄素与牛血清白蛋白(BSA)相互作用的热力学特征.荧光光谱分析表明,姜黄素和去甲氧基姜黄素均能有效猝灭BSA的内源荧光,猝灭机制属于静态猝灭.通过计算,获取了相应的热力学参数,证明2种药物与BSA的相互作用是一个吉布斯自由能降低的自发过程,且二者之间的主要作用力为疏水作用力.位点竞争实验和分子模拟的结果表明,2种药物在BSA的主要结合位点均为SiteⅠ.圆二色谱的分析发现,2种药物使BSA的构象发生了改变.
Under simulated physiological conditions, the thermodynamic properties of the interaction between curcumin and its derivatives, b-methoxy curcumin, and bovine serum albumin (BSA) were studied by fluorescence spectroscopy, circular dichroism and molecular simulation methods. The results showed that both curcumin and demethoxycurcumin could effectively quench endogenous fluorescence of BSA, and the quenching mechanism belongs to static quenching.According to the calculation, the corresponding thermodynamic parameters were obtained and the interaction between the two drugs and BSA was proved Is a Gibbs free energy to reduce the spontaneous process, and the main force between the two hydrophobic interaction force site competition experiments and molecular simulation results show that the two major binding sites in BSA are SiteI Circular dichroism analysis revealed that the two drugs changed the conformation of BSA.