负反循环损害了植物中自途径的NMD介导病毒限制
Yalin Chen1, Mingxuan Jia1, Linhao Ge1
1State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|August 27, 2024
概括
无意中介衰变 (NMD) 和自抑制植物病毒. 这项研究揭示了NMD蛋白SMG7通过自降解,产生影响病毒限制的反循环,揭示了这些途径之间的新型相互作用.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物病理学 植物病理学
- 免疫的细胞机制.
背景情况:
- 无意中介衰变 (NMD) 和自对于植物抗病毒防御至关重要.
- 植物抗病毒反应中的NMD和自之间的相互作用在很大程度上仍未被探索.
研究的目的:
- 调查NMD和自之间的相互联系,以限制黄瓜绿斑马赛克病毒 (CGMMV) 在植物中的感染.
- 阐明NbSMG7的作用及其在抗病毒防御中的自性调节.
主要方法:
- 过度表达和NMD因子 (NbSMG7,NbUPF3) 和自因子 (NbATG8i) 的基因沉默.
- 局部定向的突变发生来破坏NbSMG7.7中的ATG8相互作用动机 (AIM).
- 病毒注射试验和受感染植物的表型分析.
主要成果:
- 过度表达NbSMG7和NbUPF3抑制了CGMMV感染.
- 通过与NbATG8i的相互作用,NbSMG7经历了自降解.
- 干扰NbSMG7-NbATG8i相互作用损害了自降解,并降低了抗病毒功效.
- 结合NMD和自基因的沉默加剧了病毒积累.
结论:
- NbSMG7的自降解起到负反机制的作用,损害了NMD介导的抗病毒防御.
- 在植物抗病毒免疫中发现了NMD和自之间的一种新型调节相互作用.
- 结果为优化NMD和基于自的病毒感染策略提供了洞察力.
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