NMR spectroscopy showed that 1 resisted an off‐target thiolate, thus indicating that 1 was a target covalent inhibitor (TCI). By identifying the pharmacophore of 1 (α,β‐unsaturated moiety), a probe derived from 1 was designed and synthesized for TCI‐oriented activity‐based proteome profiling. By MS/MS and computer‐guided molecular biology approaches, an affinity‐driven Michael addition of the noncatalytic
传统药物为探索有效的先导化合物提供了肥沃的土壤,然而,将其转化为现代药物在解密对其
生物学活性具有机械学意义的靶标方面充满了挑战。在这里,我们揭示(Z)-(+)-异
硫氰酸盐(1)对多药耐药(MDR)癌
细胞系和小鼠异种移植物表现出显着的抑制作用。NMR光谱显示1抵抗脱靶的
硫醇盐,因此表明1是目标共价
抑制剂(TCI)。通过鉴定1(α,β-不饱和部分)的药效基团,衍生自1的探针是为面向TCI的基于活动的蛋白质组分析而设计和合成的。通过MS / MS和计算机指导的
分子生物学方法,发现GAPDH的非催化C247残基的亲和力驱动的迈克尔加成可通过非规范的核GAPDH移位来控制凋亡的“ ON / OFF”切换,从而绕开了常见的MDR癌症的凋亡抗性途径。