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脊髓灰质炎病毒的非性传播需要非结构性蛋白3CD

David Aponte-Diaz¹, Jayden M Harris¹, Tongjia Ella Kang¹

¹Department of Microbiology and Immunology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.

|December 12, 2024

概括

脊髓灰质炎病毒使用自来传播,但一种特定的病毒蛋白质突变阻止了这种非性传播. 这种蛋白质对于形成和加载囊泡至关重要,揭示了病毒对自传播的控制.

科学领域:

病毒学病毒学
细胞生物学细胞生物学
分子生物学分子生物学

背景情况:

像脊髓灰质炎病毒 (PV) 这样的非外病毒利用宿主分泌的自来进行非临床传播.
病毒被包装在自胞体中,通过单膜囊泡进行运输和释放.
由LC3相互作用区域 (LIRs) 介导的微管相关蛋白1B-轻链3 (LC3) 相互作用是载荷载入自细胞体的关键.

研究的目的:

调查病毒因素的作用,特别是PV非结构蛋白3CD中的假定LIR,在非性传播机制中.
阐明PV 3CD在自细胞生物发生和非性传播的病毒负载中的功能.
通过了解分泌性自途径的病毒操纵来识别潜在的抗病毒标.

主要方法:

在3CD蛋白的假定LIR中生成并分析了一种具有F-to-Y替代的PV突变.
评估了病毒的纳入LC3阳性自细胞和流入等离子体膜的过程.
利用高角度环状暗场扫描传输电子显微镜观察PV诱导的自细胞生物发生.

主要成果:

这种PV 3CD F-to-Y突变体在非性传播中表现出严重的缺陷.
这种突变阻止了病毒体被纳入自细胞和随后的释放.
病毒诱导的自信号通常会产生功能性自细胞体,但3CD突变会损害自细胞体生物发生.

结论:

一种病毒非结构性蛋白质 (PV 3CD) 直接参与囊泡的形成和载荷,用于非性传播.
在PV 3CD中LIR图案的结构,可访问性和/或动态对于这个过程至关重要.
对自依赖病毒的病毒蛋白中LIR动机的进一步研究可能会揭示新的抗病毒策略.

关键词:

格巴拉帕 (Gabarap) 是一个古老的城市.LC3 LC3 LC3 LC3 的意思是这里是LIR LIR.自自是自的过程.细胞膜细胞膜肠道病毒病毒.非性传播的非性传播.脊髓灰质炎病毒是什么?复制器官是复制器官中的一个.

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