Sulfocoumarins (1,2-Benzoxathiine-2,2-dioxides): A Class of Potent and Isoform-Selective Inhibitors of Tumor-Associated Carbonic Anhydrases
作者:Kaspars Tars、Daniela Vullo、Andris Kazaks、Janis Leitans、Alons Lends、Aiga Grandane、Raivis Zalubovskis、Andrea Scozzafava、Claudiu T. Supuran
DOI:10.1021/jm301625s
日期:2013.1.10
Coumarins were recently shown to constitute a novel class of mechanism-based carbonic anhydrase (CA, EC 4.2.1.1) inhibitors. We demonstrate that sulfocoumarins (1,2-benzoxathiine 2,2-dioxides) possess a similar mechanism of action, acting as effective CA inhibitors. The sulfocoumarins were hydrolyzed by the esterase CA activity to 2-hydroxyphenyl-vinylsulfonic acids, which thereafter bind to the enzyme
最近显示香豆素构成一类新的基于机理的碳酸酐酶(CA,EC 4.2.1.1)抑制剂。我们证明了磺基香豆素(1,2-苯并氧杂氨酸2,2-二氧化物)具有相似的作用机理,可作为有效的CA抑制剂。磺基香豆素通过酯酶CA活性水解为2-羟苯基-乙烯基磺酸,然后在很少被其他类型的抑制剂占据的区域中与该酶结合。这些化合物之一与经修饰的CA II酶加成的X射线结构具有从CA IX活性位点获得的两个氨基酸残基,这使我们能够理解其抑制机理。观察到磺酸固定在锌配位的水分子上,与Thr200和Pro201形成良好的相互作用。其他一些磺基香豆素结合了1,2,