在大米内体中基因组印记的上游调节器是一个小的RNA关联染色体重塑器
Avik Kumar Pal1, Vivek Hari-Sundar Gandhivel1, Amruta B Nambiar1
1National Centre for Biological Sciences, Tata Institute of Fundamental Research, GKVK Campus, Bangalore, India.
Nature communications
|September 6, 2024
概括
OsCLSY3对于大米内的发育和基因组印记至关重要,调节小RNA (sRNA) 和必要的印记基因. 它的破坏会导致发育缺陷和显著的sRNA损失.
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:
- 植物的基因组印记依赖于可转移元素 (TE) 和小RNAs (sRNAs) 来进行内的表观遗传调节.
- 农作物内的发展和印记中的sRNA及其调节机制的确切作用在很大程度上仍然不清楚.
研究的目的:
- 研究一种新型CLASSY (CLSY) 族染色体重塑剂OsCLSY3在米内的发育和基因组印记中的功能.
- 阐明OsCLSY3在小RNA通路中的位置及其通过RNA导向DNA甲基化 (RdDM) 的调节.
主要方法:
- 对比的转录组分析.
- 转基因大米谱系的遗传分析
- 对小RNA种群的分析.
- 在OsCLSY3促进体中研究RNA导向的DNA甲基化 (RdDM).
主要成果:
- OsCLSY3表现出内精偏好的表达和可能的父性印记,由促进体TEs的RdDM调节.
- OsCLSY3的乱导致严重的内精发育缺陷和显著的减少 (约. 70%) 在总的sRNA中.
- OsCLSY3对于维持生殖健康至关重要的内精特异性sRNA (警报器) 是必不可少的,并调节许多印记和种子发育基因.
结论:
- OsCLSY3通过在sRNA路径上游发挥作用,在子内的发育和基因组印记中发挥着至关重要的作用.
- 这些发现表明,CLSY3同类可能在其他谷物物种中采用类似的调控策略,用于印记和种子开发.
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