新兴的JEV基因型5表现出明显的Codon使用特征.
Xiaoyu Gu1, Ruichen Wang1, Yuhong Yang1
1National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, NHC Key Laboratory of Biosafety, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China.
Pathogens (Basel, Switzerland)
|January 28, 2026
概括
日本脑炎病毒 (JEV) 基因型5 (G5) 显示出明显的编码体使用,具有较低的GC含量和更强的自然选择. 这可能会增强免疫逃避和宿主适应,这表明在人类中有效复制的潜力.
科学领域:
- 病毒学 病毒学
- 分子进化分子进化
- 基因组学就是基因组学.
背景情况:
- 日本脑炎病毒 (JEV) 是一个重要的公共卫生问题.
- 了解病毒演变是控制JEV的关键.
- 杰夫病毒表现出多种基因型的遗传多样性.
研究的目的:
- 为了研究JEV基因型5 (G5) 的代使用特征.
- 为了比较G5与其他JEV基因型 (G1-G4) 的代使用模式.
- 阐明G5 JEV.的分子进化机制.
主要方法:
- 对339个完整的JEV基因组序列的分析.
- 使用了相对同义符号使用 (RSCU),主要组件分析 (PCA),有效符号数量 (ENC) 和符号适应指数 (CAI).
- 包括进化,核酸组成,二核酸丰富度和中立性情节分析.
主要成果:
- G5形成了一个独特的进化分支,其GC含量较低 (50%) 和GC3 (53%).
- G5 具有偏好的 A/U 结尾子使用率和较强的子使用偏差 (平均 ENC = 54.2).
- 自然选择压力在G5上更强;它在人类宿主中显示出更高的翻译效率.
结论:
- G5 JEV可能通过减少CpG使用和优化代码子偏好来增强免疫逃避和宿主适应.
- G5 JEV具有在人类或其他哺乳动物宿主中有效复制的潜力.
- 结果为JEV疫苗开发提供了洞察力.
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