鉴定与植物病毒相关的卫星RNA中的γ形RNA元素相互作用的宿主因子
Mengjiao Li1, Xiaobei Zhang1, Kaiyun Huang1
1College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou 310018, China.
Viruses
|October 28, 2023
概括
黄瓜马赛克病毒卫星RNAs使用γ形RNA元素 (γRE) 通过与宿主因子 (如基质子H3和翻译启动因子4A) 相互作用来抑制病毒复制.
科学领域:
- 植物病毒学 植物病毒学
- 分子生物学分子生物学
- RNA结构功能关系是RNA结构功能关系.
背景情况:
- 黄瓜马赛克病毒 (CMV) 卫星RNA (satRNAs) 具有保存的γ形RNA元素 (γRE).
- γRE对于satRNA生存和抑制CMV复制至关重要.
- γRE的精确生物功能在很大程度上仍未被阐明.
研究的目的:
- 为了确定与gRE相互作用的宿主因素.
- 研究这些宿主因子在CMV和satRNA感染中的作用.
- 揭示satRNA介导的CMV复制抑制的机制.
主要方法:
- 生物标记的gRE拉下测试用于选来自Nicotiana benthamiana*的相互作用宿主因子.
- 烟草虫病毒诱导的基因沉默以降低候选宿主因子的调节.
- 用GFP表达的CMV (CMV-gfp) 和satRNA分离T1.1进行感染测定.
主要成果:
- 九个宿主因子与γRE.特别相互作用.
- 基因组H3,GTPase Ran3和真核细胞翻译启动因子4A对于CMV-gfp和sat-T1感染至关重要.
- 细胞质甘-3-酸脱酶2促进了CMV和sat-T1复制,同时对CMV 2b活动进行了负面调节.
结论:
- 确定了参与γRE功能的关键宿主因子 (海斯H3,Ran3,eIF4A).
- 证明了特定宿主因子在支持病毒和satRNA复制中的作用.
- 提供了对CMV复制的satRNA介导抑制背后的分子机制的见解.
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