Triazolylthioacetamide: A Valid Scaffold for the Development of New Delhi Metallo-β-Lactmase-1 (NDM-1) Inhibitors
作者:Le Zhai、Yi-Lin Zhang、Joon S. Kang、Peter Oelschlaeger、Lin Xiao、Sha-Sha Nie、Ke-Wu Yang
DOI:10.1021/acsmedchemlett.5b00495
日期:2016.4.14
against CcrA, ImiS, and L1 at inhibitor concentrations of up to 10 μM. Compounds 4d and 6c are partially mixed inhibitors with Ki values of 0.49 and 0.63 μM using cefazolin as the substrate. Structure–activity relationship studies reveal that replacement of hydrogen on the aromatic ring by chlorine, heteroatoms, or alkyl groups can affect bioactivity, while leaving the aromatic ring of the triazolylthiols
金属β-内酰胺酶(MβLs)裂解β-内酰胺抗生素的β-内酰胺环,赋予这些药物对细菌的抗性。制备了二十四种三唑基硫代乙酰胺,并将其评估为代表MβLs三种亚类的抑制剂。所有这些化合物均显示出对NDM-1的特异性抑制活性,IC 50值范围为0.15-1.90μM,但在抑制剂浓度高达10μM时对CcrA,ImiS和L1无活性。化合物4d和6c是与K i部分混合的抑制剂以头孢唑林为底物时的0.49和0.63μM值。结构与活性之间的关系研究表明,用氯,杂原子或烷基取代芳环上的氢会影响生物活性,而使三唑基硫醇的芳环保持未修饰状态则可保持抑制作用。对接研究表明,典型的强效NDM- 1、4d和6c抑制剂在NDM-1的活性位点形成稳定的相互作用,三唑桥接Zn1和Zn2,酰胺与Lys 211(Lys224)相互作用。