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终端尿基转移酶URT1调节了转录组和种子的初级休眠状态

Jackson Peter¹, Jeanne Roignant¹, Sebastian Sacharowski²

¹Institut de biologie moléculaire des plantes, CNRS, Université de Strasbourg, Strasbourg, France.

|February 5, 2026

概括

在Arabidopsis thaliana中的RNA尿化调节了mRNA衰变. UTP:RNA URIDYLYLTRANSFERASE 1 (URT1) 是种子中的关键,控制mRNA积累和降解以成熟和休眠.

科学领域:

植物分子生物学植物分子生物学
在RNA生物学,RNA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.

背景情况:

RNA尿化是真核生物中mRNA降解的关键转录后调节器.
在阿拉比多普西斯中,尿化会影响mRNA衰变途径,但它在植物发育中的作用在很大程度上尚未被探索.
了解mRNA尿化对于破译植物生长和成熟期间的基因表达调节至关重要.

研究的目的:

在各种阿拉比多普西斯组织中全面绘制mRNA尿基化事件.
为了确定UTP:RNAURIDYLYLTRANSFERASE 1 (URT1) 和HEN1 SUPPRESSOR1 (HESO1) 在Arabidopsis mRNA尿化中的特定作用.
阐明mRNA尿化在种子发育和休眠期中的重要性.

主要方法:

适应和应用FLEP-seq2,一种基于纳米孔测序的方法,用于转录组全方位的尿化概况.
在不同的Arabidopsis组织中对尿化模式的比较分析.
在mRNA尿化中URT1和HESO1的功能评估.

主要成果:

确定URT1是所有被检查的Arabidopsis组织中负责mRNA尿化的主要酶.
发现HESO1对mRNA尿基激酶产生极小的贡献.
在种子中观察到一种独特的mRNA尿化模式,URT1依赖性尿化在种子成熟中起着双重作用.
依赖URT1的尿基化促进了与翻译相关的mRNA的降解,同时通过防止死基化,促进了与成熟相关的mRNA的积累.
确定URT1是种子休眠的调节者.

结论:

URT1是Arabidopsis中mRNA尿化的主要媒介,在种子发育中起着重要的作用.
在成熟过程中,URT1依赖性尿化独特地塑造了种子转录组,平衡了mRNA衰变和稳定性.
URT1在调节种子休眠期中发挥着关键作用,突出显示了mRNA尿化的发育重要性.

关键词:

主要休眠状态的主要休眠状态尿化尿化晚期的种子成熟.

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