Discovery of Inhibitor of Wnt Production 2 (IWP-2) and Related Compounds As Selective ATP-Competitive Inhibitors of Casein Kinase 1 (CK1) δ/ε
作者:Balbina García-Reyes、Lydia Witt、Björn Jansen、Ebru Karasu、Tanja Gehring、Johann Leban、Doris Henne-Bruns、Christian Pichlo、Elena Brunstein、Ulrich Baumann、Fabian Wesseler、Bernd Rathmer、Dennis Schade、Christian Peifer、Uwe Knippschild
DOI:10.1021/acs.jmedchem.8b00095
日期:2018.5.10
Inhibitors of Wnt production (IWPs) are known antagonists of the Wnt pathway, targeting the membrane-bound O-acyltransferase porcupine (Porcn) and thus preventing a crucial Wnt ligand palmitoylation. Since IWPs show structural similarities to benzimidazole-based CK1 inhibitors, we hypothesized that IWPs could also inhibit CK1 isoforms. Molecular modeling revealed a plausible binding mode of IWP-2 in
Wnt产生的抑制剂(IWPs)是Wnt途径的已知拮抗剂,其靶向膜结合的O-酰基转移酶豪猪(Porcn),从而防止关键的Wnt配体棕榈酰化。由于IWP显示出与基于苯并咪唑的CK1抑制剂的结构相似性,因此我们假设IWP也可以抑制CK1异构体。分子模型揭示了在CK1δ的ATP结合口袋中IWP-2的合理结合模式,这通过X射线分析得以证实。体外证明激酶测定IWPs是的ATP竞争性抑制剂重量CK1δ。IWP也强烈抑制了Gatekeeper突变体M82FCK1δ。当在一组320种激酶中进行分析时,IWP-2特异性抑制CK1δ。IWP-2和IWP-4还抑制了各种癌细胞系的生存能力。通过药物化学方法,我们开发了改良的IWP衍生的CK1抑制剂。我们的结果表明,IWP的作用不仅限于Porcn,还可能影响CK1δ/ε相关途径。