RING1误解变体揭示了DNA损伤修复对神经发生过程中H2A单双化剂量敏感性
C W Ryan1,2,3, S L Regan3, E F Mills3
1Cellular and Molecular Biology Program, University of Michigan Medical School, Ann Arbor, MI, USA.
Nature communications
|September 10, 2024
概括
多镇压复合体1 (PRC1) 调节了H2AK119ub1.1. RING1变体影响神经前细胞中的DNA修复和细胞周期,而RNF2变体更广泛地影响基因表达.
科学领域:
- 表观遗传学和染色质修饰
- 分子生物学分子生物学
- 神经科学是一个神经科学.
背景情况:
- 聚合物抑制复合物1 (PRC1) 催化了素H2A氨酸119的单双化 (H2AK119ub1).
- RING1和RNF2是PRC1.1的可互换的催化子单位.
- 致病变体揭示了淘汰模式中隐藏的功能,特别是RING1.
研究的目的:
- 研究RING1和RNF2在神经发育过程中的PRC1功能中的不同作用.
- 确定低形变体对H2AK119ub1沉积和下游细胞过程的影响.
- 澄清DNA损伤反应与基因表达对H2AK119ub1剂量的敏感性.
主要方法:
- 在体外神经发育模型.
- 分析PRC1复合物的活性与低形态RING1和RNF2变体.
- 评估H2AK119ub1水平,DNA损伤修复,细胞周期进展和神经前代细胞 (NPC) 中的基因表达.
主要成果:
- 环1有助于广泛的H2AK119ub1放置,与重叠目标到RNF2.
- 低态RING1降低了H2AK119ub1,延迟了NPC中的DNA修复和细胞周期进展,而不会影响分化.
- 低形态RNF2会导致H2AK119ub1的减少,导致DNA修复延迟和广泛的转录变化.
结论:
- 对于H2AK119ub1的剂量变化,DNA损伤反应比基因表达调节更敏感.
- 根据H2AK119ub1减少的程度,RING1和RNF2对细胞过程产生不同的影响.
- 在神经前中,PRC1子单元的功能对于保持基因组稳定性和适当的细胞周期控制至关重要.
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