ASAR lncRNAs通过与多个hNRNP/RNA结合蛋白的相互作用来控制DNA复制时间
Mathew Thayer1, Michael B Heskett2,3, Leslie G Smith1
1Department of Chemical Physiology and Biochemistry,Oregon Health & Science University, Portland, United States.
eLife
|June 19, 2024
概括
称为ASAR的非常长的非编码RNA对染色体稳定性和复制时间至关重要. 它们充当支架,组装hNRNP复合体以维持哺乳动物染色体结构.
科学领域:
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 非常长的非编码RNAs (ASARs) 对于控制人类自体的复制时间和保持染色体稳定性至关重要.
- 已知ASAR与其父染色体结合在一起.
研究的目的:
- 研究ASARs在全基因组复制时间中的作用.
- 为了识别与ASARs相互作用的RNA结合蛋白 (RBPs).
- 阐明ASARs调节复制时间和染色体结构的机制.
主要方法:
- 对RNA-蛋白相互作用数据的分析 (ENCODE).
- 基因删除和子宫外整合试验.
- 通过shRNA介导的RBP的枯竭.
- 评估ASAR lncRNA局部化和复制时间.
主要成果:
- 许多 RBPs,特别是 hnRNPs,与 ASAR lncRNAs相互作用.
- 在ASAR6-141中的一个特定域富含RBP相互作用点,并控制cis中的复制时间.
- 特定的hnRNP的耗尽导致ASAR脱离染色体并破坏同步复制,模仿ASAR淘汰效应.
- ASARs在全基因组复制的时间顺序中发挥作用.
结论:
- ASARs作为组装hNRNP复合体的关键RNA支架起作用.
- 这些复合体对于维持哺乳动物染色体的结构完整性至关重要.
- ASARs是复制时间和染色体稳定性的关键调节者.
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