(IC50 33 μM). Optimization of hit 3 by SAR studies guided by SBDD identified indazole 38 (IC50 0.032 μM) and isoquinoline 45 (IC50 0.085 μM) as potent inhibitors of NOTUM. The binding of 45 to NOTUM was rationalized through an X-ray co-crystal structure determination which showed a flipped binding orientation compared to 3. However, it was not possible to combine NOTUM inhibition activity with metabolic
NOTUM 是一种
羧酸酯酶,已被证明通过介导 Wnt 蛋白的O-去棕榈油酰化而发挥作用,从而抑制 Wnt 信号传导。在这里,我们描述了 NOTUM
抑制剂的开发,该
抑制剂可恢复 Wnt 信号传导,用于在NOTUM 过度活动是潜在原因的体外疾病模型中。用 NOTUM 进行的晶体片段筛选确定 2-苯氧基乙酰胺3与
棕榈油酸袋结合,具有适度的抑制活性 (IC 50 33 μM)。由 S
BDD 指导的
SAR 研究优化命中3确定了
吲唑38 (IC 50 0.032 μM) 和
异喹啉45 (IC 500.085 μM) 作为 NOTUM 的有效
抑制剂。通过 X 射线共晶体结构测定使45与 NOTUM的结合合理化,该测定显示与3相比翻转的结合方向。然而,不可能将 NOTUM 抑制活性与代谢稳定性结合起来,因为大多数测试的化合物以
NADPH 非依赖性方式快速代谢。