普拉梅尔15促进了细胞核DNMT1的降解和DNA脱甲基化
Jiajun Tan1,2,3,4, Yingfeng Li1,2,3, Xiang Li1
1National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.
Nature communications
|August 24, 2024
概括
一个母因子,Pramel15,调节了小鼠胚胎中DNA甲基转移酶1 (DNMT1) 的水平. 失去Pramel15会影响DNA脱甲基化,影响早期胚胎表观遗传重编程.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 发育生物学 发展生物学
- 分子生物学分子生物学
背景情况:
- 全球被动DNA去甲基化对于早期哺乳动物胚胎发育中的表观遗传重编程至关重要.
- 从核中排除DNA甲基转移酶1 (DNMT1) 被认为是这种脱甲基化的主要驱动因素.
- 对于残留核DNMT1活动的调节仍然不完全理解.
研究的目的:
- 为了研究控制核DNMT1在小鼠囊中丰富的额外的监管机制.
- 确定在胚胎早期发育过程中微调DNMT1水平的因素.
主要方法:
- 在小鼠囊中进行蛋白质体降解测定.
- 确定针对DNMT1.1的母性因素.
- 在基因操纵后早期胚胎中分析DNA甲基化模式.
主要成果:
- 核DNMT1的丰富性是由小鼠胚胎中的蛋白质体降解调节的.
- 一种母性因子,Pramel15,通过Cullin-RING E3酶对DNMT1进行降解.
- 失去Pramel15会导致核DNMT1的增加,细胞细胞DNA脱甲基化受损,以及早期胚胎的异常DNA甲基化增长.
结论:
- 在胚胎DNA复制过程中,Pramel15在调节核DNMT1水平方面发挥着关键作用.
- 这种Pramel15的调节对于确保早期哺乳动物胚胎中有效的DNA甲基化重编程至关重要.
- 普拉梅尔15代表了控制胚胎期内表观遗传重编程的关键因素.
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