主生长调节器DELLA与素H2A结合,对于DELLA介导的全球转录调节至关重要
Xu Huang1, Hao Tian1,2, Jeongmoo Park1,3
1Department of Biology, Duke University, Durham, NC, USA.
Nature plants
|August 3, 2023
概括
作为关键植物生长调节剂的DELLA蛋白与转录因子和素H2A结合. 这种相互作用稳定了DELLA与染色质的结合,使植物能够进行全基因组转录调节.
科学领域:
- 植物分子生物学 植物分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 基因规则 基因规则
背景情况:
- 德拉蛋白是植物中主要的生长调节剂,通过与转录因子 (TF) 和表观遗传调节剂相互作用来控制发育.
- 通过DELLAs重编程基因表达的精确分子机制仍然不完全理解.
研究的目的:
- 为了阐明DELLA介导的转录重编程的分子机制.
- 研究特定DELLA域在染色体协会和基因调节中的作用.
主要方法:
- 阿拉比多普西斯 (Arabidopsis) 的ga1-3抑制剂 (RGA) 的误解等位基因的表征.
- 同免疫沉测试以确定蛋白质相互作用.
- 染色体免疫沉,然后进行测序 (ChIP-seq) 以映射RGA结合部位.
主要成果:
- 通过其PFYRE子域,RGA与基因素H2A结合,在色素中形成TF-RGA-H2A复合体.
- 这种H2A相互作用对于RGA与色素的全球关联至关重要.
- 德拉对促进者的招募涉及通过LHR1结合TF,而通过PFYRE的H2A相互作用稳定了该复合体.
结论:
- 德拉蛋白具有独特的模块化功能,用于全基因组的转录调节.
- 通过PFYRE子域与H2A之间的相互作用对于稳定染色质上的DELLA复合体至关重要.
- 这项研究揭示了DELLA介导植物发育的表观遗传控制的新机制.
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