通过DDX17的茎环识别促进了miRNA处理和抗病毒防御.
Ryan H Moy1, Brian S Cole2, Ari Yasunaga1
1Department of Microbiology, Penn Genome Frontiers Institute, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA.
Cell
|August 16, 2014
概括
死亡盒螺旋酶DDX17限制了裂谷热病毒 (RVFV) 的感染. 这种免疫作用是保留和独立于干扰素,涉及DDX17与病毒RNA和宿主微RNA前体结合.
科学领域:
- 分子生物学分子生物学
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
背景情况:
- 死亡盒酶对于RNA代谢至关重要.
- 新出现的证据表明它们参与了免疫反应.
- 裂谷热病毒 (RVFV) 对健康构成重大风险.
研究的目的:
- 研究DEAD-box酶DDX17在对RVFV的免疫力中的作用.
- 为了确定DDX17的功能是否保持和干扰素独立.
主要方法:
- 在Drosophila和人类细胞中进行RNA干扰 (RNAi) 查.
- 病毒复制试验. 病毒复制试验.
- 交叉连接免疫沉降高通量测序 (CLIP-seq).
主要成果:
- 丢失DDX17 (Drosophila中的Rm62) 增强了RVFV感染.
- 人类DDX17的耗尽,但不是DDX5,增加了RVFV的复制.
- DDX17结合宿主pri-miRNA干环进行处理和病毒RNA干环限制感染.
结论:
- 在限制RVFV感染方面,DDX17起着保守的,干扰素独立的作用.
- DDX17表现出双根循环识别:促进宿主miRNA生物发生和限制病毒RNA.
- DDX17充当结构病毒RNA元素的细胞质传感器.
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