核细胞膜A/C通过调节局部H3K9me3和ADP-ribosylation水平来控制复制叉在压力时重新启动
Veronica Cherdyntseva1, Joanna Paulson2, Daniel González-Acosta1
1Institute of Molecular Cancer Research, University of Zurich, Zurich, Switzerland.
Nature communications
|November 29, 2025
概括
核胺A/C蛋白对于在轻度复制应激 (RS) 期间减缓DNA复制叉来说至关重要,这是癌症化学疗法的关键策略. 它的损失会破坏叉子的稳定性和重新启动,影响治疗反应.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 遗传学 遗传学 是一个
背景情况:
- 轻度复制应激 (RS) 是一种癌症化疗策略.
- 对轻度RS的耐受性包括分叉减速,逆转和RECQ1-辅助重启.
- 在轻度RS中,核结构蛋白质 (如Lamin A/C) 的作用尚未完全理解.
研究的目的:
- 研究Lamin A/C在对轻度复制应激反应中的作用.
- 阐明拉明A/C调节DNA复制叉动态的机制.
主要方法:
- 急性蛋白质失活的技术.
- 细胞生物学测试. 细胞生物学测试.
- 单分子方法研究复制工厂.
主要成果:
- 拉明A/C与复制工厂有动态相互作用,在轻度RS下,对于分叉减速和染色体稳定性至关重要.
- 核等离子体Lamin A/C的无活化会降低新生DNA中的多ADP-ribosylation (PAR),从而导致反向分叉的RECQ1-介导重启.
- 对于H3K9me3异染色素标记积累在轻度RS的反应中,需要Lamin A/C,防止其通过JMJD1A/KDM3A.去除.
结论:
- 在轻度RS期间,核等离子膜A/C,H3K9me3和PARylation水平是叉动态的关键,相互连接的调节者.
- 这些发现对癌症化疗的疗效和对人类疾病中的拉敏A/C功能障碍的理解有影响.
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