条病毒NS3使用宿主信号通路来控制病原性
Xinjian Zhuang1, Chenwei Feng1, Yanhong Hua1
1Department of Plant Protection, College of Plant Protection, Yangzhou University, Yangzhou 225009, Jiangsu, P.R. China.
Developmental cell
|June 3, 2025
概括
条病毒 (RSV) 通过改变其NS3蛋白来操纵宿主防御. 这一策略平衡了病毒病原性和传染性,以确保大米植物和传媒昆虫的长期生存.
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
- 昆虫载体生物学 昆虫载体生物学
背景情况:
- 病毒对全球农业产生重大影响,需要了解它们的宿主-病原体动态.
- 条病毒 (RSV) 是由植物 Laodelphax striatellus传播的病毒,会对作物造成大量损害.
- 对可持续宿主和载体相互作用的病毒适应策略在很大程度上是未知的.
研究的目的:
- 阐明RSV调节其致病性和传染性的分子机制.
- 研究病毒NS3蛋白在操纵宿主抗病毒途径和信号传递中的作用.
- 确定RSV在病毒-载体-宿主相互作用系统中使用的共同生存策略.
主要方法:
- 对病毒NS3蛋白相互作用和感染期间酸化状态的分析.
- 研究受感染植物中的 (Ca2+) 信号通路和反应性氧物种 (ROS) 生产.
- 通过RSV对宿主抗病毒RNA干扰 (RNAi) 途径调节的评估.
- 在不同感染阶段对病毒病原性和传染性的评估.
主要成果:
- 早期的RSV感染涉及有限的NS3自我相互作用,抑制宿主RNA干扰 (RNAi) 并通过Ca2+-OsSnRK3.25-OsCBL1/3-OsRBOHs信号传递诱导ROS爆发,导致高致病性.
- 晚期感染阶段显示出丰富的NS3酸化,增强宿主RNAi,同时破坏OsSnRK3.25信号通路,从而降低了病原性和可传播性.
- 通过NS3酸化和与OsSnRK3.25.2的相互作用,RSV积极操纵宿主防御机制.
结论:
- RSV采用动态策略,通过NS3酸化微调其致病性和传播能力,并劫持宿主信号通路.
- 病毒在病毒-宿主-载体相互作用中保持着微妙的平衡,优化了其长期生存.
- 这项研究揭示了一个复杂的共同生存策略,这对于RSV在其生态中持续存在至关重要.
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