The 2,4,5-triaryl imidazole derivatives (API) were designed, screened and characterized kinetically & thermodynamically against Pepsin and their activity was also tested on the in silico platform. The docking studies of API with Pepsin show that these are novel and unique inhibitors of Aspartic protease. Drug like properties of these compounds were validated in silico based on Lipinski's rule of Five by calculating ClogP, LogS, H-bond acceptors, H-Bond donors, rotational bonds, PSA, PB and BBB values. The Et/Ki and Et/Km values of API show that they follow the Michaelis-Menten kinetics. The binding of inhibitors with proteases was explained by using Van't Hoff plot and thermodynamic parameters viz. free energy (ΔG), Entropy (ΔS) and Enthalpy (ΔH). The Van't Hoff analysis showed that the value of Ki decreases with increase in temperature and the binding of the inhibitor are entropically driven. API act as new potent aspartic protease inhibitors with Ki, for Pepsin, ranges from 3.7 µM to 16.7 µM. Strong hydrophobic groups at C-4 & C-5 position in API favor binding of inhibitors with Pepsin. Experiments also showed that among C-2 aryl substituted imidazole, a 4-substitution on aryl ring is preferred and less polar substituent makes the molecule more active whereas polar substituents at 2-position on C-2 aryl ring makes the molecule less active. The docking studies of API with Pepsin further intensify and validate our results.
2,4,5-三芳基
咪唑衍
生物(A
PI)被设计、筛选并在动力学和热力学方面鉴定,与胃
蛋白酶进行对比,其活性也在计算机模拟平台上进行了测试。A
PI与胃
蛋白酶的对接研究表明,这些化合物是
天冬氨酸蛋白酶的新型独特
抑制剂。这些化合物的药物样性质通过计算ClogP、LogS、氢键受体、氢键供体、旋转键、极性表面积(P
SA)、分配系数(PB)和血脑屏障(BBB)值,依据Li
PInski五规则进行了计算验证。A
PI的Et/Ki和Et/Km值表明它们遵循迈克利斯-门腾动力学。
抑制剂与
蛋白酶的结合通过范特霍夫图和热力学参数(即自由能(ΔG)、熵(ΔS)和焓(ΔH))进行了阐释。范特霍夫分析显示,Ki值随着温度的升高而降低,
抑制剂的结合是由熵驱动的。A
PI作为新的有效
天冬氨酸蛋白酶抑制剂,对于胃
蛋白酶,其Ki值范围为3.7 µM至16.7 µM。A
PI在C-4和C-5位的强疏
水基团有利于
抑制剂与胃
蛋白酶的结合。实验还表明,C-2芳基取代的
咪唑中,4位取代的芳基环更受欢迎,且较不极性的取代基使分子活性增强,而C-2芳基环2位的极性取代基会使分子活性降低。A
PI与胃
蛋白酶的对接研究进一步加强并验证了我们的结果。