N4-乙基丁mRNA修饰调节了植物中的光合作用
Jie Zhao1, Huijie Liu1, Tingting Li1
1College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China.
The New phytologist
|June 28, 2025
概括
N4-乙基丁 (ac4C) 的mRNA修饰对于植物的光合作用和高光适应至关重要. 丢失ACYR酶会损害关键光合作用蛋白的翻译,影响植物的性能.
科学领域:
- 植物分子生物学 植物分子生物学
- 对于RNA的表观遗传学
- 光合作用研究研究光合作用.
背景情况:
- N4-乙基丁 (ac4C) 是一种在真核生物中保存的mRNA修饰物.
- 它在植物中的作用,特别是在光合作用中,基本上是未知的.
- ac4C是唯一已知的真核mRNA的乙化修饰.
研究的目的:
- 为了研究ac4C修饰在植物中的功能.
- 探索ac4C在光合作用和高光适应中的调节机制.
- 为了确定RNA乙酶ACYR (RNA中cytidine的N-ACETYLTRANSFERASES) 在植物中的作用.
主要方法:
- 在六种植物物种的核和塑体转录中分析ac4C分布.
- 在Arabidopsis和大米中对ACYR进行基因淘汰研究.
- 多omics分析包括乙化RNA免疫沉降测序,RNA-seq和Ribo-seq.
- 对蛋白质丰富度和翻译效率的生物化学分析.
主要成果:
- ac4C 修饰被保留并与叶绿体发育和光合作用有关.
- 失去ACYR会损害光合作用性能和适应高光.
- ac4C损失抑制了LIGHT-HARVESTING COMPLEX II (LHCB2,LHCB3,LHCB4) 转录的翻译效率,从而降低了蛋白质水平.
- 其他光合作用相关转录的翻译效率也下降.
结论:
- 在植物中,mRNA上的ACYR介导的ac4C修饰调节了光合作用和高光适应.
- ac4C提高了光合作用装置组件的翻译效率.
- 这种RNA修饰在维持LHC蛋白质稳态和整体植物光合作用功能方面发挥着至关重要的作用.
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