HPF1通过在受损DNA上激活PARP1和PARP2来调节FUS依赖区的形成
Anastasia S Singatulina1, Maria V Sukhanova1, Loic Hamon2
1Institute of Chemical Biology and Fundamental Medicine (ICBFM), Siberian Branch of the Russian Academy of Sciences (SB RAS), Novosibirsk 630090, Russia.
Nucleic acids research
|March 3, 2026
概括
惠普F1调节了多 (ADP-ribose) (PAR) 聚合酶的活性,影响了FUS蛋白区块的形成. 在HPF1中,HPF1是
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- FUS蛋白参与生物分子凝聚物形成.
- 由PARP1介导的Poly (ADP-ribose) (PAR) 合成与FUS凝结物形成有关.
- HPF1是PARP1和PARP2活动的调节者.
研究的目的:
- 为了研究在PARP1和PARP2激活下FUS区的形成.
- 了解HPF1在调节PARP活动和FUS隔间组件中的作用.
- 探索HPF1对FUS PARylation的影响及其对凝结物形成的影响.
主要方法:
- 原子力显微镜 (AFM) 用于可视化FUS区间.
- 生物化学测试用于评估PARP活性和PARylation水平.
- 在PARP1,PARP2和HPF1度的不同条件下进行了实验.
主要成果:
- 与PARP1相似的PARP2激活导致富含DNA的FUS区的形成.
- 过多的HPF1会降低PARP1的活动和富含DNA的区间的大小,但不会降低PARP2的活动.
- HPF1 增强了 FUS 异构PARylation 的作用,PARP2 的作用更大,而不是 PARP1.
- 通过HPF1调节的PARP1或PARP2进行的强度FUS PARylation会损害富含DNA的区间组合.
结论:
- PARP2活性足以形成涉及FUS的富含DNA的区间.
- HPF1不同影响PARP1和PARP2的活动以及它们在FUS凝结物形成中的作用.
- 通过HPF1介导的FUS PARylation可以在DNA损伤部位中破坏富含DNA的区块的组装.
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