Inhibition of arabinose 5-phosphate isomerase. An approach to the inhibition of bacterial lipopolysaccharide biosynthesis
作者:Eric C. Bigham、Charles E. Gragg、William R. Hall、John E. Kelsey、William R. Mallory、Drew C. Richardson、Charles Benedict、Paul H. Ray
DOI:10.1021/jm00372a003
日期:1984.6
Arabinose 5-phosphate ( A5P ) isomerase is a key enzyme in the biosynthesis of lipopolysaccharide, an essential component of the outer membrane of Gram-negative bacteria. The mechanism of the isomerase is envisioned to involve an enediol intermediate. A series of compounds, which are analogues of the substrates or intermediate, were tested as inhibitors of A5P isomerase with the belief that a good
5-磷酸阿拉伯糖(A5P)异构酶是脂多糖生物合成中的关键酶,脂多糖是革兰氏阴性细菌外膜的重要组成部分。设想异构酶的机理涉及烯二醇中间体。测试了一系列与底物或中间体类似的化合物作为A5P异构酶的抑制剂,并认为良好的抑制剂会阻止细菌生长或使细胞更易受其他抗生素或自然防御作用。在一系列磷酸化糖中,异构酶抑制活性的顺序如下:醛糖酸大于醛糖醇大于醛糖。非磷酸化糖的抑制作用要小得多。最好的抑制剂是4-磷酸赤藓酸(54),Km / Ki = 29。