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基于冷EM的发现一种致病性帕沃病毒,在养殖甲虫中引起黑色衰竭病的流行病死亡率

Judit J Penzes¹, Martin Holm¹, Samantha A Yost²

¹Institute for Quantitative Biomedicine, Rutgers, The State University of New Jersey, Piscataway, NJ, USA.

|August 29, 2024

概括

一种名为Zophobas morio black wasting virus (ZmBWV) 的新型病毒导致了一场超级虫大流行. 通过冷电子显微镜识别了ZmBWV,而非致病菌株显示出交叉保护的潜力.

科学领域:

病毒学
结构生物学
昆虫病理学

背景情况:

美国的昆虫养殖设施在过去四年中因幼虫病态和殖民地崩而面临重大损失.
导致这一农业流行病的病因仍未确定,

研究的目的:

为了确定超级虫流行病的致病原体.
使用冷电子显微镜 (cryo-EM) 进行鉴定病毒的特征,并确定其基因组和结构性质.
通过使用非致病性病毒株来研究交叉保护的潜力.

主要方法:

使用冷电子显微镜 (cryo-EM) 作为测序和培养独立的诊断工具.
科赫的假设得到了满足,
进行了病毒的基因组和结构分析,包括高分辨率的冷EM结构确定.

主要成果:

病因被确定为一个名为Zophobas morio黑色消耗病毒 (ZmBWV) 的密度病毒.
具有高达2.1 Å分辨率的冷电磁结构揭示了体内的ssDNA排序和子体间相互作用的细节.
非致病菌株具有预防潜力,在体内提供交叉保护.

结论:

ZmBWV 是一种具有 5,542 nt 基因组的 Parvoviridae 家族成员,是超级虫流行病的病因.
这项研究提供了ZmBWV的结构生物学见解,解释了其扩大的内部体积.
使用交叉保护性非致病菌株的预防策略为管理昆虫养殖中ZmBWV疫情提供了潜在的解决方案.

关键词:

佐福巴斯·莫里奥体结构体-DNA 相互作用化电磁场密集病毒诊断病毒学新出现的传染病昆虫学帕维病毒超级虫

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