inhibitor bound with high micromolar affinity and did not bind more tightly than an isosteric inhibitor lacking the guanidinium functionality. When tested against the Type I isopentenyl diphosphate:dimethylallyl diphosphate isomerase from Escherichia coli, the inhibitor bound with a Ki value of 120 nM, which was 400 times greater than its isosteric counterpart. This strategy of inhibition was much more
设计一种带有附加到
胍基官能团上的膦基
膦酸酯基的
抑制剂,以抑制从二甲基烯丙基二
磷酸产生碳正离子的酶。当针对人类法呢基二
磷酸合酶进行测试时,该
抑制剂以高微摩尔亲和力结合,并且与缺乏
胍基官能团的等排
抑制剂相比,结合不紧密。当针对来自大肠杆菌的I型异
戊烯基二
磷酸异
戊烯基:二甲基烯丙基二
磷酸异构酶进行测试时,该
抑制剂与K i结合120 nM的值,是其等排对应物的400倍。这种抑制策略对于产生碳阳离子的酶更为有效,该碳阳离子不能通过共振和离子对稳定,这可能是因为酶上有更多的进化压力来稳定阳离子。