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通过直接RNA测序验证多样化和以前无法追踪的仙台病毒复制病毒基因组

Sarah E Pye^1,2, Emna Achouri^1,2, Yanling Yang^1,2

¹Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, Missouri, USA.

Journal of virology

|July 31, 2025

概括

直接RNA测序 (DRS) 现在可以有效地测序全长的复制病毒基因组 (cbVGs). 这种方法克服了PCR的局限性,使人们能够更好地了解病毒感染动态和结果.

科学领域:

病毒学病毒学
分子生物学分子生物学
基因组学就是基因组学.

背景情况:

复制病毒基因组 (cbVGs) 是截断的病毒RNA分子,具有互补的末端,由许多病毒自然生成.
cbVGs通过影响复制,抗病毒反应和蛋白质翻译在病毒感染中发挥关键作用.
现有的研究cbVG的方法,主要是基于PCR,由于无法对全长基因组进行测序以及可能引入错误而受到限制.

研究的目的:

优化直接RNA测序 (DRS) 以获得原生,复制病毒基因组 (cbVGs) 的全长序列.
开发一种基于BLAST的分析方法,用于从长时间读取的测序数据中识别cbVGs.
克服目前基于PCR的方法在cbVG分析中的局限性.

主要方法:

直接RNA测序 (DRS) 协议的优化,用于测序cbVGs.
利用基于BLAST的分析管道从DRS长读测序数据中识别cbVGs.
从多个仙台病毒 (SeV) 库存中分析了DRS输出,包括复合菌株.

主要成果:

优化的DRS成功生成了全长cbVG序列,包括以前未被描述的物种.
确定了DRS的最佳条件,例如将互补长度增加到32nt以捕获主导的cbVGs.
与标准建议 (1,000 ng) 相比,证明了高质量的cbVG测序,RNA输入显著减少 (17.6 ng介质,50 ng细胞).

结论:

优化DRS是一个强大的,有效的工具,用于验证本地全长cbVGs,包括那些在基因组开始附近的断裂点.
这种方法可以更准确,更全面地了解病毒感染期间产生的各种cbVG种群.
优化的DRS方法显著推进了对Mononegavirales病毒及其cbVGs的研究,这对于了解感染结果至关重要.

关键词:

这就是LoCA的LoCA.生物信息学是一种生物信息学.复制病毒基因组的复制.有缺陷的病毒基因组.直接进行RNA测序.这种病毒是paramyxovirus.病毒基因组病毒基因组

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