端粒重复结合蛋白TRB4和TRB5作为PRC2受控基因的转录激活剂,以调节植物发育
Simon Amiard1, Léa Feit1, Emmanuel Vanrobays1
1iGReD, CNRS, Inserm, Université Clermont Auvergne, 63000 Clermont-Ferrand, France.
Plant communications
|April 3, 2024
概括
端粒重复结合 (TRB) 蛋白调节植物的发育. TRB4和TRB5作为转录激活剂,影响开花和环境反应,揭示了复杂的TRB家族相互作用.
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.
- 转录法规 转录法规
背景情况:
- 植物特异性TELOMERE重复结合 (TRB) 蛋白质具有用于基因调节的DNA结合域 (GH1和Myb/SANT).
- TRB1-3蛋白质招募聚合组复合体2 (PRC2) 通过H3K27me3沉积和H3K4me3在telobox动机上的去除来抑制转录.
研究的目的:
- 研究TRB4和TRB5的功能,TRB1-3的类型,在植物基因调节.
- 确定TRB4与PRC2组件的相互作用及其在基因激活中的作用.
- 阐明TRB4和TRB5在植物发育和环境反应中的参与.
主要方法:
- 对TRB4.4的全基因组结合分析.
- 同免疫沉以评估TRB4与PRC2组件的相互作用 (SWINGER,CURLY LEAF).
- 基因突变植物的表型分析和遗传相互作用研究.
主要成果:
- TRB4广泛与活跃基因的促进区结合,与TRB1的抑制作用不同.
- TRB4与PRC2组件SWINGER和CURLY LEAF进行物理相互作用.
- TRB4和TRB5对于CLF突变的特定表型至关重要,作为CLF控制基因的转录激活剂,包括开花调节剂.
结论:
- TRB4和TRB5作为转录激活剂,调节参与发育和环境反应的数百个CLF受控基因.
- TRB4与PRC2组件相互作用,这表明TRB4在PRC2依赖和PRC2独立的监管途径中都有作用.
- TRB蛋白在家族内表现出复杂的相互作用,调解植物发育的正负两种转录调节.
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