引起的脑炎病毒NS5蛋白的核活动和相互作用
Maxime Chazal1, Aïssatou Aïcha Sow1, Elodie Le Seac'h1
1Unité Signalisation Antivirale, UMR CNRS 3569, Université Paris Cité, Institut Pasteur, Paris, France.
bioRxiv : the preprint server for biology
|December 15, 2025
概括
传染性脑炎病毒 (TBEV) NS5蛋白定位在细胞核中,在那里它与细胞因子相互作用以调节病毒复制. 这一发现突显了NS5在传播的orthoflaviviruses中的核作用.
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:
- ортофлавиви病毒导致重大疾病.
- NS5蛋白对病毒复制和宿主免疫调节至关重要.
- 此前,传播的orthoflavivirus中NS5的核功能尚不清楚.
研究的目的:
- 为了研究传染性脑炎病毒 (TBEV) NS5蛋白的核定位和功能.
- 为了确定核中的TBEV NS5交互伙伴.
- 了解核NS5在病毒复制中的作用.
主要方法:
- 显微镜和细胞分离以确定NS5定位.
- 突变生成以确定核准残留物.
- 免疫沉质谱测量用于识别NS5相互作用体.
- 功能性测试,以评估NS5合作伙伴对病毒复制的影响.
主要成果:
- 在感染细胞的细胞质和核质中发现了TBEV NS5蛋白.
- 特定的残留物被确定为TBEV NS5核进口的关键.
- 影响核进口的突变取消了病毒复制.
- 确定了352个NS5合作伙伴,其中187个局部存在于核中.
- 七个核NS5合作伙伴显著调节病毒复制.
结论:
- TBEV NS5蛋白活跃地转移到核中.
- 核NS5与宿主因子相互作用,包括拼接因子和染色体调节器.
- 这些核相互作用对于有效的病毒复制是必不可少的,这强调了核NS5在传播的orthoflavivirus生命周期中的重要性.
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