Development of metal-chelating inhibitors for the Class II fructose 1,6-bisphosphate (FBP) aldolase
作者:Geneviève Labbé、Anthony P. Krismanich、Sarah de Groot、Timothy Rasmusson、Muhong Shang、Matthew D.R. Brown、Gary I. Dmitrienko、J. Guy Guillemette
DOI:10.1016/j.jinorgbio.2012.02.032
日期:2012.7
6-bisphosphate (FBP) aldolase could be a good drug target against bacteria and fungi, since lower organisms possess a metal-dependant (Class II) FBP aldolase, as opposed to higher organisms which possess a Schiff-base forming (Class I) FBP aldolase. We have tested the capacity of derivatives of the metal-chelating compound dipicolinic acid (DPA), as well a thiol-containing compound, to inhibit purified recombinant
长期以来,人们一直认为必需和普遍存在的果糖1,6-二磷酸(FBP)醛缩酶可能是抵抗细菌和真菌的良好药物靶标,因为与生物体相比,低等生物体具有金属依赖性(II类)FBP醛缩酶。具有席夫碱形成(I类)FBP醛缩酶的高级生物。我们已经测试了金属螯合化合物二吡啶甲酸(DPA)的衍生物以及含硫醇的化合物抑制结核分枝杆菌,铜绿假单胞菌,蜡状芽孢杆菌,炭疽芽孢杆菌和稻瘟病致病菌Magnaporthe grisea。来自的醛缩酶结核分枝杆菌对金属螯合抑制剂最敏感,使用2,3-二巯基丙烷磺酸盐(DMPS)的IC 50为5.2μM,使用DPA的IC 50为28μM。DMPS和合成的抑制剂6-(膦酰基甲基)吡啶甲酸以时间依赖性,竞争性方式抑制酶,其二阶速率常数分别为273和270 M -1 s -1,以使这些化合物与M结合。底物FBP(K M 27.9μM)存在时结核病醛缩酶的活性位点。最有效的第一代抑制剂被模拟到结核分枝杆菌的活性位点