5,6-Benzoflavones as cholesterol esterase inhibitors: synthesis, biological evaluation and docking studies
作者:Jatinder V. Singh、Anumeet Kaur、Kavita Bhagat、Manish K. Gupta、Manwinder Singh、Harbinder Singh、Preet Mohinder S. Bedi
DOI:10.1039/c7md00565b
日期:——
with an IC50 value of 0.73 nM against cholesterol esterase. To determine the type of inhibition, enzyme kinetic studies were carried out for B-16, which revealed its mixed-type inhibition approach. Moreover, to figure out the key binding interactions of B-16 with the amino acid residues of the enzyme's active site, molecular protein–ligand docking studies were also performed. B-16 completely blocks the
在继续努力开发有效的胆固醇酯酶(CEase)抑制剂时,通过改变先前报道的7,8-苯并黄酮中与黄酮骨架相连的苯环的位置,合理设计和合成了一系列5,6-苯并黄酮衍生物。使用分光光度测定法检查所有合成的化合物对胆固醇酯酶(CEase)的抑制潜力。在这四十种化合物中,在体外酶促测定中,七种衍生物(B - 10至B - 16)对CEase的抑制率超过90%。化合物B - 16的IC 50表现出最有希望的活性胆固醇酯酶的值为0.73 nM。为了确定抑制的类型,对B - 16进行了酶动力学研究,揭示了其混合类型的抑制方法。此外,为了弄清B - 16与酶活性位点氨基酸残基的关键结合相互作用,还进行了分子蛋白质-配体对接研究。B - 16完全阻断了CEase的催化组装,并阻止了它参与酯的水解机理。B - 16的良好结合构象表明其作为CEase抑制剂的主要作用。总体而言,研究表明,顺式环A相对于环C的羰基的取