Discovery of a novel 53BP1 inhibitor through AlphaScreen-based high-throughput screening
作者:Yanli Sun、Haibo Lu、Xueyu Fang、Senhao Xiao、Feng Yang、Yantao Chen、Hongbo Wang、Xiaopeng Li、Jing Lu、Hua Lin、Cheng Luo、Kehao Zhao、Shijie Chen
DOI:10.1016/j.bmc.2021.116054
日期:2021.3
genome editing. UNC2170 and its derivatives have been reported as 53BP1 targeted small molecular inhibitors with modest activities. Hence, to discover better 53BP1 inhibitors, we conducted an AlphaScreen assay based high-throughput screening (HTS) and identified a novel and effective 53BP1-TTD inhibitor DP308 which disrupts the binding between 53BP1 and H4K20me2 peptide with an IC50 value of 1.69 ± 0
肿瘤抑制因子 p53 结合蛋白 1 (53BP1) 是一种串联 tudor 结构域 (TTD) 蛋白,通过特异性识别组蛋白上的赖氨酸甲基化参与 DNA 损伤修复 (DDR) 途径。53BP1的失调与包括癌症在内的多种疾病的发生发展密切相关。此外,最近的研究发现,缺乏 53BP1 可以提高精确 CRISPR/Cas9 基因组编辑的效率。因此,抑制剂的发现有利于53BP1生物学功能的研究和CRISPR/Cas9基因组编辑的应用。UNC2170 及其衍生物已被报道为具有适度活性的 53BP1 靶向小分子抑制剂。因此,为了发现更好的 53BP1 抑制剂,50值 1.69 ± 0.73 μM。Microscale Themophoresis (MST) 和表面等离子体共振 (SPR) 测定均证实了 DP308 和 53BP1-TTD 蛋白之间的直接结合,结合亲和力 (K d ) 约为 2.7 μM。分子对接研究进一步表明