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从日本脑炎病毒感染的细胞中释放的状蛋白的不同状态

Sora Ohta¹, Kotaro Ishida², Simon Goto¹

¹Department of Biochemistry and Molecular Biology, Faculty of Agriculture and Life Science, Hirosaki University, Japan.

|July 19, 2025

概括

日本脑炎病毒 (JEV) 囊蛋白是独立于病毒颗粒分泌的. 自由囊蛋白通过 lysosome-mediated 途径释放,这表明它在基因组包装之外有不同的作用.

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:

脊髓炎病毒囊蛋白对于病毒颗粒组装和基因组包装至关重要.
囊蛋白的多样性特性表明,它们的潜在功能超出了结构性作用.

研究的目的:

为了研究日本脑炎病毒 (JEV) 体蛋白质的分泌,独立于病毒组合.
描述JEV囊蛋白的形式和分泌途径.

主要方法:

使用了一种表达囊蛋白与HiBiT标签 (JEV C-HiBiT) 融合的重组JEV.
通过使用糖密度梯度分离分析了培养超水体.
进行了二次感染实验,并与短暂表达细胞进行比较.
使用Bafilomycin A1治疗和 lysosomal局部化研究研究的分泌途径.

主要成果:

JEV C-HiBiT表现出与野生类型的JEV相似的增长,具有较高的报告活动.
囊蛋白分泌在两个不同的状态:较重的峰值 (virions) 和较轻的峰值 (自由囊蛋白).
在不同细胞类型中观察到与亚病毒颗粒或膜囊泡相对应的额外峰值.
巴菲洛米辛A1治疗增强了自由体蛋白质的分泌,体局部化到溶酶体.

结论:

JEV囊蛋白是独立于病毒颗粒形成的分泌.
自由囊蛋白很可能通过溶酶体介导的分泌途径释放.
这些发现表明,JEV囊蛋白在结构功能之外的病毒传播中具有多方面的作用.

关键词:

卡普西德蛋白释放的蛋白质在 HiBiT 标签上.日本脑炎病毒病毒.lysosome 是一种溶解体.这种病毒叫做orthoflavivirus.病毒颗粒的形成.

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