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A Highly Selective Chemical Probe for Activin Receptor-like Kinases ALK4 and ALK5.
ACS Chemical Biology ( IF 3.5 ) Pub Date : 2020-03-20 , DOI: 10.1021/acschembio.0c00076
Thomas Hanke 1 , Jong Fu Wong 2 , Benedict-Tilman Berger 1 , Ismahan Abdi 1 , Lena Marie Berger 1 , Roberta Tesch 1 , Claudia Tredup 1 , Alex N Bullock 2 , Susanne Müller 1 , Stefan Knapp 1
Affiliation  

The transforming growth factor beta-receptor I/activin receptor-like kinase 5 (TGFBR1/ALK5) and its close homologue ALK4 are receptor protein kinases associated with the development of diverse diseases, including cancer, fibrosis, heart diseases, and dysfunctional immune response. Therefore, ALK4/5 are among the most studied kinases, and several inhibitors have been developed. However, current commercially available inhibitors either lack selectivity or have not been comprehensively characterized, limiting their value for studying ALK4/5 function in cellular systems. To this end, we report the characterization of the 2-oxo-imidazopyridine, TP-008, a potent chemical probe with dual activity for ALK4 and ALK5 as well as the development of a matching negative control compound. TP-008 has excellent cellular potency and strongly abrogates phosphorylation of the substrate SMAD2 (mothers against decapentaplegic homologue 2). Thus, this chemical probe offers an excellent tool for mechanistic studies on the ALK4/5 signaling pathway and the contribution of these targets to disease.

中文翻译:

激活素受体样激酶ALK4和ALK5的高度选择性化学探针。

转化生长因子β受体I /激活素受体样激酶5(TGFBR1 / ALK5)及其紧密同源物ALK4是与多种疾病(包括癌症,纤维化,心脏病和免疫功能异常)发展相关的受体蛋白激酶。因此,ALK4 / 5是研究最多的激酶之一,并且已经开发了几种抑制剂。但是,目前市售的抑制剂要么缺乏选择性,要么没有得到全面的表征,从而限制了其在细胞系统中研究ALK4 / 5功能的价值。为此,我们报告了2-氧代-咪唑并吡啶TP-008的特性,这是一种对ALK4和ALK5具有双重活性的有效化学探针,并且开发了匹配的阴性对照化合物。TP-008具有出色的细胞效价,可强烈消除SMAD2底物的磷酸化(母亲针对十足功能障碍同系物2)。因此,该化学探针为ALK4 / 5信号通路以及这些靶标对疾病的贡献的机理研究提供了极好的工具。
更新日期:2020-04-23
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