病毒蛋白通过通过相分离和多元化促进OsTSN1RNA衰变来抑制大米防御
Ming Zeng1, Shuai Fu1,2, Youping Xu3
1State Key Laboratory of Rice Biology and Breeding, Zhejiang Key Laboratory of Biology and Ecological Regulation of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, Zhejiang, P.R. China.
Nature communications
|August 12, 2025
概括
南方大米黑条纹矮人病毒 (SRBSDV) P6蛋白质劫持液体-液体相分离 (LLPS) 以降低宿主免疫转录. 这一过程涉及OsTSN1,削弱了植物的防御,帮助SRBSDV感染并突出了OsTSN1.
科学领域:
- 植物病毒学 植物病毒学
- 分子植物病原体相互作用
- 细胞生物学 细胞生物学
背景情况:
- 液-液相分离 (LLPS) 对植物应激反应至关重要.
- 在植物免疫的病毒逃避中LLPS的作用在很大程度上是未知的.
- 南方大米黑条纹矮人病毒 (SRBSDV) 感染了大米植物.
研究的目的:
- 调查SRBSDV如何利用LLPS克服宿主免疫力.
- 阐明SRBSDV P6蛋白与宿主因子相互作用的分子机制.
- 了解OsTSN1在植物防御途径和病毒感染中的作用.
主要方法:
- 研究了SRBSDV P6蛋白质的LLPS特性.
- 同免疫沉测试以确定相互作用的蛋白质.
- 核酶活性测定以确定P6对OsTSN1.1的影响.
- 转录组分析以确定目标宿主基因.
- 与其他相关病毒进行比较分析.
主要成果:
- SRBSDV P6蛋白诱导LLPS,与OsTSN1.1一起形成液滴.
- P6增强了OsTSN1核酶活性,降解了OsNAC15和OsLHY转录.
- 这些转录的降解损害了莉酸 (JA) 和自介导的植物防御.
- 其他病毒RNA沉默抑制剂也利用OsTSN1进行宿主免疫逃避.
- OsTSN1作为一个中央调节器,被多个病毒选择.
结论:
- SRBSDV P6蛋白操纵LLPS和OsTSN1以抑制大米免疫力.
- OsTSN1是一个关键的宿主因子,由不同的病毒共同准,以促进感染.
- 了解这些机制为植物病毒相互作用和防御策略提供了新的见解.
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