Thiol Probes To Detect Electrophilic Natural Products Based on Their Mechanism of Action
作者:Gabriel Castro-Falcón、Dongyup Hahn、Daniela Reimer、Chambers C. Hughes
DOI:10.1021/acschembio.5b00924
日期:2016.8.19
halogenated aromatic reagents, the process furnishes derivatives that are UV-active and highly conspicuous via mass spectrometry by virtue of an isotopically unique bromine or chlorine tag. In addition to the identification of high-value metabolites, the process facilitates the difficult task of structure elucidation by providing derivatives that are primed for X-ray crystallographic analysis. We show
迫切需要寻找新的天然产物的新方法,以作为开发针对新兴疾病(例如癌症和多耐药细菌感染)的新药物的结构线索。在这里,我们介绍了一种用于亲电天然产物的反应性指导药物发现方法,该方法是一种在粗提物中共价修饰其细胞靶标的,与治疗相关的天然产物。使用精心设计的卤代芳族试剂,该方法借助同位素独特的溴或氯标记物,通过质谱分析提供了具有紫外线活性和高度显着性的衍生物。除了鉴定高价值的代谢物外,该过程还提供了准备用于X射线晶体学分析的衍生物,从而简化了结构阐明的艰巨任务。我们表明,半胱氨酸探针可以有效地和化学选择性地标记基于烯酮,β-内酰胺和β-内酯的亲电子天然产物(单粉体,穿心莲内酯,渥曼青霉素,青霉素G,水杨酰胺),而硫酚探针则优先标记基于环氧化物的亲电子体天然产物(雷公藤甲素,环己霉素,eponemycin,cyclomarin,salinamide)。使用优化的方法,我们能够从中检测并分离出带有环氧化