通过ZRF1对多抑制基因的转录激活
Holger Richly1, Luciana Rocha-Viegas, Joana Domingues Ribeiro
1Centre de Regulació Genòmica (CRG)/UPF, 08003 Barcelona, Spain.
Nature
|December 24, 2010
概括
在细胞分化过程中,ZRF1蛋白质结合到无处不在的基因组H2A,取代多抑制复合体1 (PRC1),以激活基因转录. 这种表观遗传机制是细胞命运决定的关键.
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.
- 分子生物学分子生物学
- 基因规则 基因规则
背景情况:
- 基因组共价变异调节染色体动力学和基因转录.
- 希斯H2A单元-ubiquitination与多介导的转录沉默有关,但其确切作用尚不清楚.
研究的目的:
- 阐明ZRF1 (素相关因子1) 在基因表达的表观遗传调节中的功能.
- 为了研究ZRF1与无处不在的素H2A相互作用并影响染色质状态的分子机制.
主要方法:
- 招募测试以确定ZRF1与无处不在的素H2A的相互作用.
- 染色体免疫沉,然后进行测序 (ChIP-seq) 进行ZRF1,RING1B和H2A-ubiquitin的全基因组映射.
- 在人类细胞系中进行细胞分化研究.
主要成果:
- ZRF1在其素域内拥有一种新的全方位胺相互作用域,使其能够与全方位胺基因素H2A (H2A-K119ub) 进行特定的结合.
- 在基因组H2A无化过程中,ZRF1被招募到染色质中,并在细胞分化过程中积极取代多抑制复合体1 (PRC1).
- 全基因组分析揭示了ZRF1在调节大量多基因的关键作用,影响细胞命运决定.
结论:
- ZRF1充当关键的表观遗传调节者,调解多抑制基因过渡到活性状态.
- ZRF1 - 基因素H2A无处不在相互作用为动态基因调节和细胞命运决定提供了一个分子机制.
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