通过基因素辅导体ASF1的基因素辅导体调节复制性基因素RNA代谢
Shweta Mendiratta1, Dominique Ray-Gallet1, Sébastien Lemaire1
1Institut Curie, PSL Research University, Sorbonne Université, CNRS UMR3664, Laboratoire Dynamique du Noyau, Equipe Labellisée Ligue contre le Cancer, 75005 Paris, France.
Molecular cell
|January 23, 2024
概括
基因组辅导体ASF1枯竭会损害人体细胞中复制性基因组RNA的产生. 这种"护送检查点"调节了组胺水平,防止细胞因不平衡的组胺剂量而受损.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 在S阶段的DNA复制需要增加用于染色体组装的组基因子生产.
- 基因组辅助体在调节基因组可用性和染色质形成方面发挥着至关重要的作用.
研究的目的:
- 为了研究基因组伴侣ASF1在控制人体细胞中复制性基因组生产中的作用.
- 要了解ASF1是如何将基质子生产与染色质组合联系在一起的.
主要方法:
- 在人类细胞中,ASF1伴侣细胞的耗尽.
- 总RNA测序 (RNA-seq) 用于评估整体基因表达.
- 4sU标记的RNA-seq用于分析新生/新合成的RNA.
- 对复制性基因组RNAs的3'端处理的分析.
主要成果:
- ASF1的枯竭减少了复制性组织蛋白的蛋白质和RNA水平.
- 总RNA-seq显示整体基因组表达减少,而新生的RNA-seq表明新合成的RNAs增加.
- 复制性基因组RNAs表现出3'末端处理缺陷,并积累了前mRNAs.
- 这些发现表明,在ASF1枯竭时,复制性基因组RNA的产生存在缺陷.
结论:
- ASF1充当"护送检查点",调节复制性质子RNA代谢.
- 这一规则微调了组织素剂量,以维持细胞平衡,并防止有害的失衡.
- 在DNA复制过程中,由陪伴者控制的正确质子生产对于细胞存活至关重要.
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