Synthesis and Evaluation of Substrate Analogues as Mechanism-Based Inhibitors of Type II Isopentenyl Diphosphate Isomerase
作者:Joel R. Walker、Steven C. Rothman、C. Dale Poulter
DOI:10.1021/jo702061d
日期:2008.1.1
dimethylallyl diphosphate, contains a tightly bound molecule of FMN. To probe the mechanism of the reaction, cyclopropyl and epoxy substrate analogues, designed to be mechanism-based irreversible inhibitors, were synthesized and evaluated with IDI-2 from Thermus thermophilus. The cyclopropyl analogues were alternative substrates. The epoxy analogue was an irreversible inhibitor, with kI = 0.37 ± 0.07 min-1
催化异戊烯基二磷酸酯和二甲基烯丙基二磷酸酯相互转化的2型异戊烯基二磷酸异构酶(IDI-2)包含FMN的紧密结合分子。为了探测反应的机理,合成了被设计为基于机理的不可逆抑制剂的环丙基和环氧底物类似物,并用嗜热栖热菌(Thermus thermophilus)的IDI-2进行了评估。环丙基类似物是替代底物。环氧类似物是不可逆的抑制剂,k I = 0.37±0.07 min -1,K I = 1.4±0.3μM。LC-MS研究表明形成了环氧化物-FMN加合物。