一组细分的病毒包含与多个病毒种群共享同质性的基因组段
Huang Huang1,2,3, Zhongmei Zhang1,2,4, Xidan Pang1,2,3
1National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei, China.
Journal of virology
|June 4, 2025
概括
这项研究描述了Fusarium asiaticum vivivirus 1的特征,揭示了保存的蛋白质和对细分RNA病毒的进化见解. 这些发现强调了基因组细分和基因重复是活病毒多样性和适应的关键驱动因素.
科学领域:
- 病毒学 病毒学
- 菌类学 菌类学是指菌类学.
- 进化生物学 进化生物学
背景情况:
- 转基因组学揭示了多种细分RNA病毒,有助于进化研究.
- 病毒发现的挑战包括不完整的基因组和低段相似性,阻碍了超出RNA依赖RNA聚合酶 (RdRP) 的检测.
研究的目的:
- 为了描述Fusarium asiaticum vivivirus 1 (FaVvV1) 的特征,一个代表性的细分+ssRNA菌株病毒.
- 通过分析公共数据集来探索活病毒的保护和进化.
- 阐明关键的进化机制,包括生物体中的基因组细分和基因重复.
主要方法:
- 关于FaVvV1的特征,这是一个感染Fusarium asiaticum的10段+ssRNA真菌病毒.
- 挖掘23个序列读取档案 (SRA) 数据集,以识别29个与vivivirus相关的病毒 (vivivirids) 和186个病毒段.
- 保存的标志性蛋白质的遗传学和结构分析:VP1 (甲基转移酶,RdRP),VP2 (甲基转移酶,基酶),VP3 (蛋白酶),VP5 (基酶) 和VP8 (基酶).
主要成果:
- FaVvV1 拥有 10 个单基斯特朗 RNA 段,编码具有已知病毒家族同质性的蛋白质.
- 确定了29个具有186个细分的活体,揭示了VP1,VP2,VP3,VP5和VP8作为保存的标志性蛋白质.
- 遗传学和结构分析表明,在活体生物的进化过程中,多个基因组细分和基因/域重复,在VP3,VP5,VP8和potyvirids之间有潜在的共同祖先.
结论:
- 活病毒表现出复杂的进化历史,由基因组细分和基因/域重复驱动.
- 像VP1,VP2,VP3,VP5和VP8这样的保存蛋白质对于识别和理解活病毒至关重要.
- 这些发现提供了对细分RNA病毒,特别是mycoviruses的多样性,适应性和进化机制的见解.
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