TARG1和PARG的相互作用可以防止基因组不稳定
Joséphine Groslambert1, Evgeniia Prokhorova1, Anne R Wondisford2
1Sir William Dunn School of Pathology, University of Oxford, Oxford OX1 3RE, UK.
Cell reports
|September 7, 2023
概括
ADP-ribosylhydrolase TARG1对于DNA修复至关重要. 它的缺失使细胞对某些抑制剂敏感,并导致基因组不稳定,突出显示TARG1.
科学领域:
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
- 生物化学 生物化学
背景情况:
- ADP-ribosylation是一种动态的翻译后修改,对DNA修复至关重要.
- ADP-ribosylhydrolases (例如,TARG1) 对于逆转ADP-ribosylation具有至关重要的作用.
- 特定ADP-ribosylhydrolases在DNA损伤反应中的精确作用仍然不完全理解.
研究的目的:
- 为了阐明TARG1的生理功能,一种可以去除阿斯巴酸/谷氨酸结合ADP-ribosylation的酶.
- 研究TARG1在DNA损伤反应中的作用及其对癌症治疗的影响.
主要方法:
- 描述TARG1的酶活性和细胞局部化.
- 分析TARG1缺乏细胞中细胞对DNA破坏剂和抑制剂 (拓酶II,ATR,PARP) 的敏感性.
- 使用PARP1-介导相互作用,研究TARG1和PARG之间的合成致死性.
- 评估基因组不稳定性和复制压力.
- 评估基因素PARylation因子1 (HPF1) 缺乏的影响.
主要成果:
- 缺少TARG1会使细胞对拓酶II,ATR和PARP抑制剂产生敏感性.
- 通过PARP1调解的TARG1和PARG之间的合成致命相互作用导致有毒的ADP-ribosylation积累,复制压力和基因组不稳定.
- 缺少HPF1会加剧ADP-ribosylation诱导的毒性和基因组不稳定性,这表明氨酸和酸酸盐/酸盐相关的ADP-ribosylation通路之间存在交叉.
结论:
- TARG1通过去除有毒的ADP-ribosylation,在DNA损伤反应中发挥关键作用.
- TARG1和PARG之间的相互作用对于防止复制压力和保持基因组稳定性至关重要.
- TARG1可以作为癌细胞对PARP和PARG抑制剂反应的预测生物标志物.
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