西亚代诺病毒核心蛋白VII核定位的结构和功能表征表明存在多个核运输通路
Ajani Athukorala1, Camilla M Donnelly2, Silvia Pavan3
1Department of Microbiology, Anatomy, Physiology, and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Melbourne, VIC 3086, Australia.
The Journal of general virology
|January 23, 2024
概括
这项研究在psitacine adenovirus蛋白VII中发现了核定位信号,表明它与importin-alpha相互作用,但使用替代途径进行核导入,与人类腺病毒蛋白VII不同.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 腺病毒蛋白VII (pVII) 对于核DNA进口至关重要.
- 对于pVII的核进口机制尚未完全理解.
- 之前的研究集中在人类腺病毒.
研究的目的:
- 调查酸氨酸腺病毒F (PsSiAdV) 蛋白VII (pVII) 的核贩运情况.
- 描述PsSiAdV pVII与进口蛋白 (IMP) 的相互作用.
- 确定PsSiAdV pVII使用的核导入路径.
主要方法:
- 序列分析以确定一个假定的经典核定位信号 (cNLS).
- 光极化和电泳移动性转移对蛋白质相互作用的测试.
- 定量共聚焦激光扫描显微镜用于核定位研究.
- 对进口蛋白 (IMP) 途径的抑制试验.
主要成果:
- 在PsSiAdV pVII.II中发现了一个cNLS (PGGFKRRRL128)
- PsSiAdV pVII-NLS直接与IMPA2和IMPA3结合,具有很高的亲和力.
- PsSiAdV pVII赋予了GFP的IMPα/β-依赖的核定位.
- PsSiAdV pVII 定位在核中,独立于其他病毒蛋白质,不向核.
- 抑制IMPα/β通路并没有阻止PsSiAdV pVII核进口,这表明了其他途径.
结论:
- PsSiAdV pVII使用经典的NLS来进行输入相互作用,但使用其他途径进入核.
- 对于pVII的核导入机制因腺病毒物种而异.
- 需要进一步的研究来探索不同的NLS信号和腺病毒的导入途径.
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