虫TET与PRC1一起作用,以激活基因表达,独立于其催化活性
Guerric Gilbert1, Yoan Renaud1, Camille Teste1
1Université Clermont Auvergne, CNRS, INSERM, iGReD, F-63000 Clermont-Ferrand, France.
Science advances
|May 3, 2024
概括
果中的十一转位 (TET) 蛋白激活了幼虫大脑发育的基因. 这通过一种非酶性机制发生,与DNA上的Polycomb抑制复合体1 (PRC1) 相互作用.
科学领域:
- 表观遗传学和基因调控
- 发展生物学 发展生物学
- 分子机制的分子机制
背景情况:
- 十-十一转位 (TET) 酶通过5-甲基细胞素 (5mC) 氧化来调节基因表达.
- TET蛋白具有超出5mC修饰的非正规功能.
- 德罗斯菲拉基因组缺乏5mC,为研究TET的非正规作用提供了一个独特的系统.
研究的目的:
- 研究DrosophilaTET在幼虫中枢神经系统 (CNS) 发育中的功能.
- 在没有5mC的情况下阐明TET介导的基因激活背后的机制.
- 确定TET与多组 (PcG) 蛋白在基因调节中的相互作用.
主要方法:
- 全基因组分析,以确定TET结合位点.
- 染色体免疫沉 (ChIP) 测试用于评估蛋白质局部化.
- 基因相互作用研究评估PRC1和PRC2.2的作用.
- 在Drosophila幼虫中对基因表达的分析 中枢神经系统.
主要成果:
- 草TET激活了幼虫中枢神经系统发育所必需的基因,主要是通过一种催化独立的机制.
- TET被招募到PcG-bound增强器和促进器区域.
- 在染色蛋白上,TET与Polycomb抑制器复合体1 (PRC1) 相互作用和同位体化.
- 需要PRC1,但不需要PRC2来激活TET标基因.
- 与激活基因结合的TET和PRC1似乎相互依赖.
结论:
- 草TET通过非催化功能在幼虫中枢神经系统发育中发挥着至关重要的作用.
- 在这种情况下,PRC1对于TET介导的基因激活至关重要.
- TET和PRC1之间的相互作用突出了Drosophila幼虫中枢神经系统中激活基因的新机制.
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