在冷适应过程中,SVALKA-POLYCOMB REPRESSIVE COMPLEX2模块控制了C-REPEAT BINDING FACTOR3的诱导
Diego Gómez-Martínez1, Javier Barrero-Gil1, Eduardo Tranque1
1Departamento de Biotecnología Microbiana y de Plantas, Centro de Investigaciones Biológicas Margarita Salas-CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain.
Plant physiology
|December 21, 2023
概括
植物C-REPEAT结合因子 (CBF) 增强了耐寒性. 一项新的研究揭示了Polycomb Repressive Complex 2 (PRC2) 在SVALKA lncRNA的指导下,通过H3K27me3表达CBF3表达,从而确保适当的寒冷适应.
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.
- 植物的非生物应激反应反应
背景情况:
- C-REPEAT结合因子 (CBFs) 是植物耐寒性的关键转录因子.
- 在寒冷适应过程中,CBF基因表达被迅速诱导,但限制其表达的机制尚不清楚.
- 了解CBF法规对于提高作物耐寒性至关重要.
研究的目的:
- 研究在冷适应过程中限制CBF3表达的分子机制.
- 确定表观遗传调节在控制CBF基因表达中的作用.
- 阐明SVALKA和多镇压复合体2 (PRC2) 在冷反应中的功能.
主要方法:
- 对Arabidopsis thaliana突变的遗传分析.
- 分子生物学技术包括ChIP-seq用于H3K27me3.
- 对长非编码RNA (lncRNA) 表达和功能的分析.
主要成果:
- 寒冷适应期间CBF3诱导的下降是由PRC2.2表观遗传调节的.
- 在CBF3位点上,PRC2沉积了压制性组织蛋白标记H3K27me3,导致沉默.
- 可冷诱导的lncRNA SVALKA对于招募PRC2到CBF3至关重要.
结论:
- 一个SVALKA-PRC2调节模块在冷适应过程中控制CBF3表达的精确时间.
- 通过H3K27me3进行表观遗传沉默是终止CBF3诱导的关键机制.
- 这种规则确保了植物对寒冷的适应反应的适当发展.
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