Amino Acid Thioester Derivatives: A Highly Promising Scaffold for the Development of Metallo-β-lactamase L1 Inhibitors
作者:Xiao-Long Liu、Ying Shi、Joon S. Kang、Peter Oelschlaeger、Ke-Wu Yang
DOI:10.1021/acsmedchemlett.5b00098
日期:2015.6.11
metallo-beta-lactamases (MbetaLs), ten new mercaptoacetic acid thioester amino acid derivatives were synthesized and characterized. Biological activity assays indicated that all these synthesized compounds are very potent inhibitors of L1, exhibiting an IC50 value range of 0.018-2.9 muM and a K i value range of 0.11-0.95 muM using cefazolin as substrate. Partial thioesters also showed effective inhibitory activities
根据金属β-内酰胺酶(MbetaLs)的生物医学意义,合成并表征了十种新的巯基乙酸硫酯氨基酸衍生物。生物活性测定表明,所有这些合成的化合物都是非常有效的L1抑制剂,使用头孢唑林作为底物,IC50值范围为0.018-2.9μM,Ki值范围为0.11-0.95μM。部分硫酯还显示出对NDM-1和ImiS的有效抑制活性,IC50值范围分别为12-96和3.6-65μM。同样,所有这些硫酯都增加了表达L1的大肠杆菌细胞对头孢唑林的敏感性,这表明抗生素的MIC降低了2到4倍。对接研究揭示了两种最有效的L1抑制剂与羧酸酯基团与Zn(II)离子和Ser221相互作用的活性位点的潜在结合模式。这项工作为金属β-内酰胺酶L1抑制剂的开发引入了非常有前途的支架。