基质子变体H3.3通过调节雄性性球体发育来控制阿拉比多普西斯的生育能力
Kunpeng Liu1, Chunmei Yin1, Wenjing Ye1
1Joint Center for Single Cell Biology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China.
Plant & cell physiology
|October 10, 2023
概括
基因组突变H3.3对于植物的雄性生育能力至关重要. 它的沉积,由ASF1A/1B-HIRA介导,激活了对男性性状细胞发育和花粉功能至关重要的基因,防止不育.
科学领域:
- 植物生殖生物学 植物生殖生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子遗传学 分子遗传学
背景情况:
- 染色体重编程和基因表达的变化对于植物雄性性交配体的发展至关重要.
- 表观遗传标记,包括像H3.3这样的基因组变异,都与这些过程有关.
- 对于H3.3在植物雌性体发育中的特定作用尚不清楚.
研究的目的:
- 为了研究质子变异H3.3在Arabidopsis雄性性球体发育中的功能.
- 为了确定H3.3目标基因和参与男性生育的调节途径.
主要方法:
- 对阿拉比多普西斯h3.3-1淘汰突变的分析.
- 年轻花朵的转录组分析 (RNA-seq).
- 染色体免疫沉 (ChIP) 来识别H3.3的结合部位.
主要成果:
- 在阿拉比多普西斯中,H3.3的表达很高;h3.3-1突变体表现出男性不孕.
- H3.3淘汰导致2348个基因的下调,确定了1087个直接目标.
- H3.3目标在与繁殖相关的过程中得到了丰富,包括雄性伴生体的产生和花粉的发育.
- H3.3的功能取决于抗沉声因子1A/1B (ASF1A/1B) - 基因组调节器A (HIRA) 路径.
结论:
- 由ASF1A/1B-HIRA复合体促进的H3.3沉积对于激活对男性性伴侣发育至关重要的基因至关重要.
- 这一途径建立了对植物雄性生育至关重要的调节网络.
- H3.3 在男性性生殖过程中的转录调节中起着关键作用.
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