对腺病毒C5 hexon和人类乳酸铁素之间的相互作用的结构洞察
Arun Dhillon1, B David Persson2, Alexander N Volkov3,4
1Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic.
Journal of virology
|February 7, 2024
概括
人类乳酸 (hLF) 通过与病毒子蛋白结合,有助于腺病毒进入呼吸道细胞. 这种由冷-EM结构详述的相互作用揭示了病毒吸收的新途径,这对于基因疗法和疫苗开发至关重要.
科学领域:
- 结构生物学是结构生物学.
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
背景情况:
- 呼吸道上皮的腺病毒 (AdV) 感染很常见,但尚未完全理解.
- 传统的AdV输入涉及Coxsackie-adenovirus受体 (CAR) 和整体蛋白,这些并不总是可访问的.
- 一个独立于CAR的入口模型提出人体乳酸 (hLF) 通过子受体相互作用调解病毒吸收.
研究的目的:
- 为了阐明hLF和HAdV-C5六子体之间的分子相互作用.
- 为HAdV-C5六子体-hLF复合体提供高分辨率的结构数据.
- 了解由hLF介导的CAR独立的AdV输入的机制.
主要方法:
- 低温电子显微镜 (cryo-EM) 用于确定HAdV-C5六子体及其与hLF复合物的结构.
- 混合结构分析.混合结构分析.
- 突变分析以确定关键的结合区域.
主要成果:
- 获得了HAdV-C5六子和六子-hLF复合物的高分辨率冷EM结构.
- hLF主要通过其N端的乳酸铁素 (Lfcin) 区域和hexon的超变区1 (HVR-1) 参与HAdV-C5子.
- 突变研究证实了Lfcin内部的关键接触点,并确定了hLF中其他重要区域的六素结合.
结论:
- 这项研究揭示了hLF介导的HAdV-C5进入上皮细胞的分子基础.
- 这种独立于CAR的途径绕过了传统的AdV输入受体.
- 这些发现对推进基于AdV的基因疗法和疫苗开发有影响.
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