在SARS-CoV-2中对码子的优化和降低优化以及疫苗开发的相关影响
Xinkai Wu1, Ke-Jia Shan1, Fuwen Zan2
1State Key Laboratory of Protein and Plant Gene Research, Center for Bioinformatics, School of Life Sciences, Peking University, Beijing, 100871, China.
概括
在严重呼吸系统综合征冠状病毒2 (SARS-CoV-2) 中使用Codon演变为减少蛋白质表达,影响病毒健康. 为尖端mRNA疫苗 (Omicron变种) 优化子增强表达,帮助疫苗开发.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 疫苗开发 疫苗开发
背景情况:
- 冠状病毒疾病2019 (COVID-19) 流行病是由SARS-CoV-2引起的.
- 在全球范围内发现了成千上万的SARS-CoV-2遗传变异.
- 病毒序列分析显示,随着时间的推移,编码子适应指数 (CAI) 的下降.
研究的目的:
- 调查子使用在SARS-CoV-2进化和健康中的作用.
- 确定编码子去优化的对病毒蛋白表达的影响.
- 开发和验证针对Omicron变异的编码子优化的mRNA疫苗候选人.
主要方法:
- 序列分析以计算编码子适应指数 (CAI).
- 进化建模以了解突变偏好.
- 双露西法酶测定用于测量蛋白质表达.
- 设计和实验验证候选mRNA疫苗的设计和实验验证.
主要成果:
- 随着时间的推移,SARS-CoV-2 CAI值下降,这与突变偏好有关.
- 发现,Codon的去优化会削弱病毒蛋白的表达.
- 优化了Codon的Omicron BA.2.12.1,BA.4/5和XBB.1.5尖端mRNA疫苗显示出高表达.
结论:
- 子的使用显著影响SARS-CoV-2的演变和健康状况.
- 对于提高mRNA疫苗中蛋白质表达的优化至关重要.
- 这项研究为开发有效的mRNA和DNA疫苗提供了框架.
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