作者:Richard J. Payne、Esther M. M. Bulloch、Andrew D. Abell、Chris Abell
DOI:10.1039/b510633h
日期:——
Anthranilate synthase catalyses the conversion of chorismate to anthranilate, a key step in tryptophan biosynthesis. A series of 3-(1-carboxy-ethoxy) benzoic acids were synthesised as chorismate analogues, with varying functionality at C-4, the position of the departing hydroxyl group in chorismate. Most of the compounds were moderate inhibitors of anthranilate synthase, with inhibition constants between 20–30 µM. The exception was 3-(1-carboxy-ethoxy) benzoic acid, (C-4 = H), for which KI
= 2.4 µM. These results suggest that a hydrogen bonding interaction with the active site general acid (Glu309) is less important than previously assumed for inhibition of the enzyme by these aromatic chorismate analogues.
氨茴酸合成酶催化络氨酸到氨茴酸的转化,这是色氨酸生物合成的一个关键步骤。我们合成了一系列 3-(1-羧基-乙氧基)苯甲酸作为蝶氨酸类似物,它们在蝶氨酸的离去羟基位置 C-4 上具有不同的官能度。大多数化合物都是蒽酸合成酶的中度抑制剂,抑制常数在 20-30 µM 之间。例外的是 3-(1-羧基-乙氧基)苯甲酸(C-4 = H),其 KI = 2.4 µM。这些结果表明,在这些芳香族氯甲酸类似物对酶的抑制作用中,与活性位点一般酸(Glu309)之间的氢键相互作用没有以前假定的那么重要。