WIKI4, a novel inhibitor of tankyrase and Wnt/ß-catenin signaling.

WIKI4, a novel inhibitor of tankyrase and Wnt/ß-catenin signaling.
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DOI:
10.1371/journal.pone.0050457
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Moon RT
Moon RT
中科院分区:
综合性期刊3区
文献类型:
--
作者:
James RG;Davidson KC;Bosch KA;Biechele TL;Robin NC;Taylor RJ;Major MB;Camp ND;Fowler K;Martins TJ;Moon RT

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Wnt/β-连环蛋白信号通路控制发育过程中的重要细胞事件,并且当失调时通常促成疾病。使用高通量筛选,我们已经鉴定了Wnt/β-连环蛋白信号传导的新的小分子抑制剂WIKI 4。WIKI 4抑制癌细胞系以及人胚胎干细胞中β-连环蛋白靶基因的表达和对Wnt/β-连环蛋白信号传导的细胞应答。此外,我们证明WIKI 4通过抑制TNKS 2的酶活性介导其对Wnt/β-连环蛋白信号传导的作用,TNKS 2是轴蛋白泛素化和降解的调节剂。虽然TNKS先前已显示为Wnt/β-连环蛋白信号传导的小分子抑制剂的靶标,但WIKI 4在结构上不同于先前鉴定的TNKS抑制剂。
The Wnt/ß-catenin signaling pathway controls important cellular events during development and often contributes to disease when dysregulated. Using high throughput screening we have identified a new small molecule inhibitor of Wnt/ß-catenin signaling, WIKI4. WIKI4 inhibits expression of ß-catenin target genes and cellular responses to Wnt/ß-catenin signaling in cancer cell lines as well as in human embryonic stem cells. Furthermore, we demonstrate that WIKI4 mediates its effects on Wnt/ß-catenin signaling by inhibiting the enzymatic activity of TNKS2, a regulator of AXIN ubiquitylation and degradation. While TNKS has previously been shown to be the target of small molecule inhibitors of Wnt/ß-catenin signaling, WIKI4 is structurally distinct from previously identified TNKS inhibitors.
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