氨酸甲基化SM-LIKE PROTEIN 4对抗性地影响在阿拉比多普西斯应激反应期间的替代拼接
Yamila Carla Agrofoglio1, María José Iglesias1, Soledad Perez-Santángelo2
1Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE-UBA-CONICET) and Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, C1428EGA Buenos Aires, Argentina.
The Plant cell
|March 22, 2024
概括
蛋白质氨酸甲基转移酶5 (PRMT5) 通过甲基化SM-LIKE PROTEIN 4 (LSM4) 调节RNA处理. LSM4甲基化影响应激反应的替代拼接,在植物防御和非生物应激耐受性方面表现出对抗性作用.
科学领域:
- 分子生物学分子生物学
- 植物科学 植物科学
- 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:
- 蛋白质氨酸甲基转移酶5 (PRMT5) 催化了RNA结合蛋白的氨酸甲基化,这是一个影响RNA处理的翻译后修改.
- 氨酸甲基化对调节RNA处理,特别是替代拼接的特定作用仍然在很大程度上未被探索.
研究的目的:
- 通过使用SM-LIKE PROTEIN 4 (LSM4) 作为模型,研究PRMT5依赖的氨酸甲基化在RNA处理中的功能.
- 阐明LSM4甲基化如何影响生物和非生物应激反应的替代拼接模式.
主要方法:
- 使用了Arabidopsis thaliana作为一个模型生物.
- 采用基因突变 (lsm4和prmt5) 来研究基因表达和替代拼接.
- 在补充试验中研究了野生类型和非甲基化LSM4版本的影响.
- 在各种压力条件下分析基因表达和内质保留 (酸,细菌感染).
主要成果:
- 确定了LSM4的体内标,并发现LSM4调节了众多基因的替代拼接.
- 观察到 lsm4 和 prmt5 突变体之间的替代拼接基因有显著的重叠,这表明 PRMT5 依存的 LSM4 甲基化调节了拼接.
- 证明LSM4甲基化对非生物压力下的植物生长至关重要,在酸处理时增加.
- 表明细菌感染降低了LSM4甲基化,并且具有非甲基化LSM4的植物表现出对Pseudomonas的增强抵抗力,与免疫应答基因的内质保留减少相关.
结论:
- LSM4的氨酸甲基化在mRNA前拼接中动态调节其功能.
- LSM4甲基化在对生物和非生物应激的反应中起到对抗作用,微调植物适应.
- 这项研究提供了对氨酸甲基化在应激响应RNA处理中的调节作用的直接证据.
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