在模型藻物种Phaeodactylum tricornutum中存在Dicer-依赖的异色小RNA
Emilia Grypioti1,2,3,4, Hugues Richard4,5, Nikoleta Kryovrysanaki1,2
1Department of Biology, University of Crete, PO Box 2208, 70013, Heraklion, Crete, Greece.
The New phytologist
|December 4, 2023
概括
这项研究揭示了藻中的Dicer (DCR) 处理来自转子子的小RNA并保持表观遗传标记. DCR对于藻适应营养应激至关重要,它将RNA干扰与异染色质维护联系起来.
科学领域:
- 海洋生物学 海洋生物学
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 藻是重要的海洋微藻,推动着全球生产力的显著提高.
- RNA干扰 (RNAi) 是一种基因调控过程,涉及Dicer (DCR) 处理的小RNA (sRNA).
- 藻中RNAi的功能和作用在很大程度上仍然未被描述.
研究的目的:
- 研究藻中RNAi的机制和生理作用.
- 在模型藻 (Phaeodactylum tricornutum) 中特征Dicer (DCR) 同类物.
- 探索RNAi,表观遗传调节和藻中营养应激反应之间的关联.
主要方法:
- 在藻基因组和转录基因组中对RNAi作用因子的遗传学分析.
- 在Phaeodactylum tricornutum中生成和分析DCR淘汰线.
- 分析mRNA和sRNA种群,基因素修饰,以及淘汰赛线的饥饿反应.
主要成果:
- 原子表现出多种不同的RNAi效应器,表明不同的RNAi通路.
- P. tricornutum DCR从转位子中处理26-31 nt的sRNA,对于H3K9me2/3和H3K27me3基因组标记至关重要.
- DCR淘汰赛线显示在气饥饿后恢复受损,这表明它在营养应激适应中的作用.
结论:
- P. tricornutum DCR 在处理转子子衍生的sRNA和维持异色染色素中发挥作用.
- 由DCR介导的RNAi与藻中表观遗传调节和适应营养压力的关系.
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