Developing new chemical tools for DNA methyltransferase 1 (DNMT 1): A small-molecule activity-based probe and novel tetrazole-containing inhibitors
作者:Biwei Zhu、Jingyan Ge、Shao Q. Yao
DOI:10.1016/j.bmc.2015.03.006
日期:2015.6
development of cancers. Thus detection of endogenous DNMT activities and efficient inhibition of DNMTs have important therapeutic significance. In this work, a small molecule activity-based probe (ABP) of DNA methyltransferase 1 (DNMT1), T1, was developed. The probe was a clickable analog of tryptophan and was able to covalently label endogenous DNMT1 and inhibit its enzymatic activity more effectively than
DNA甲基化是DNA甲基转移酶(DNMT)催化的重要表观遗传修饰。人体内内源性DNMT的异常表达会导致基因组甲基化模式的改变,进而导致癌症的发展。因此,检测内源性DNMT活性和有效抑制DNMT具有重要的治疗意义。在这项工作中,开发了一种基于小分子活性的DNA甲基转移酶1(DNMT1)T1探针(ABP)。该探针是色氨酸的可点击类似物,能够共价标记内源性DNMT1并比以前已知的DNMT1抑制剂(RG108及其马来酰亚胺类似物1149)更有效地抑制其酶促活性。)。此外,我们还发现了一种新型的小分子DNMT抑制剂,其基于含四唑的化合物,该化合物是1149的类似物。在我们称为Gn的这些化合物中,其中之一(G6)在体外酶促测定和细胞生长增殖实验中均具有对DNMT1的合理抑制活性。既T1和G6显示从哺乳动物细胞中内源性DNMT1的有效标记通过使用体外竞争下拉和活细胞生物成像实验。