使用大规模并行核糖体分析进行泛病毒ORF的发现.
bioRxiv : the preprint server for biology
|October 9, 2023
概括
大规模并行核糖体分析确定了成千上万的病毒开放阅读框架 (ORF),包括非正典的. 这一发现提供了新的疫苗点和对病毒基因调节的见解.
科学领域:
- 病毒学 病毒学
- 基因组学就是基因组学.
- 蛋白质组学是指蛋白质组学.
背景情况:
- 了解病毒蛋白质组是病毒生命周期和宿主相互作用的关键.
- 现有的方法在全面识别所有病毒开放阅读框架 (ORF) 方面存在局限性.
研究的目的:
- 通过实验确定广泛的人类相关病毒基因组的ORFs的完整集合.
- 在病毒基因组中识别新的非正典ORF和调控元素.
主要方法:
- 在679个病毒基因组中的20170个设计的寡核酸上开发和应用大规模并行核酸剖析 (MPRP).
- 来自受感染细胞的免疫组数据集的分析.
- 检查病毒5'未翻译区域 (UTR) 和编码序列 (CDS) 上的核糖体占用率.
主要成果:
- 确定了5381个ORF,其中4208个是非正规的.
- 检测注释编码序列 (CDS) 和之前报告的非正规ORF.
- 发现了由MPRP识别的非正规ORF衍生的I类人类白细胞抗原 (HLA-I) .
- 识别了数百个上游ORFs (uORFs),这些ORFs负面调节了正规的病毒蛋白合成.
结论:
- MPRP提供了前所未有的病毒ORF源,跨越多种病毒家族,包括高度致病性病毒.
- 已识别的非正典ORF代表了潜在的新疫苗点.
- 在病毒基因组内暴露了新的cis-regulatory序列,增强了我们对病毒基因表达的理解.
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