与染色体相关的DEK蛋白维持H3K27me3平衡,并协调植物的发育过渡
Miyuki Nakamura1, Heinrich Bente2, Maria Derkacheva1
1Department of Plant Biology, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, SE-75007, Uppsala, Sweden.
The New phytologist
|November 15, 2025
概括
在植物中,DEK蛋白调节基因表达,通过维持基因素修饰平衡和染色质结构来调节基因表达. DEK功能丧失会增加H3K27me3水平,影响植物发育.
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.
- 发育生物学是发展生物学.
背景情况:
- 染色体组织和基因组修饰对于发育过程中的基因表达至关重要.
- DEK是一种染色素相关蛋白质,已知在DNA拓和转录中的作用,但其植物功能尚不清楚.
研究的目的:
- 为了研究Arabidopsis thaliana中DEK蛋白的体内功能.
- 阐明DEK在调节组素修饰和染色质结构中的作用.
主要方法:
- 利用了Arabidopsis thaliana dek突变物进行全基因组分析.
- 检查了与Polycomb Repressive Complex 2 (PRC2) 相关蛋白质的遗传和物理相互作用.
- 在单个和多个突变物之间进行了转录组比较.
主要成果:
- 失去DEK功能导致H3K27me3的全基因组增加,这是一个PRC2-介导的基因组修饰.
- DEK与Like HETEROCHROMATIN PROTEIN 1 (LHP1) 相互作用,并影响 lhp1突变体中的H3K27me3水平.
- DEK 缺乏改变了染色质的可访问性,并破坏了PRC2目标基因的表达,包括MADS盒转录因子.
结论:
- DEK是植物中H3K27me3恒温和染色质结构的新型调节剂.
- 通过调节表观遗传标记,DEK在协调植物发育中发挥着至关重要的作用.
- DEK和ATR-X染色体重塑剂对基因表达有相反的影响.
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