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基于调控序列的发现,在古老病毒中发现了抗防御基因
Yuvaraj Bhoobalan-Chitty1, Shuanshuan Xu2, Laura Martinez-Alvarez2
1Department of Biology, University of Copenhagen, Copenhagen N, Denmark. yuvarajb@bio.ku.dk.
Nature communications
|May 2, 2024
概括
研究人员通过分析保存的调节序列,在古生物中确定了新型病毒抗防御基因 (ADG). 这种新方法扩大了病毒抑制剂的发现范围,超出了传统的"由关联来定罪"的方法.
科学领域:
- 微生物学 微生物学
- 病毒学 病毒学
- 生物信息学是一种生物信息学.
背景情况:
- 传统的病毒抗CRISPR蛋白质 (Acrs) 鉴定依赖于由关联的内,受到特征的古老Acrs和抗CRISPR相关蛋白质 (Acas) 稀缺性的限制.
- 现有的方法很难在古老病毒中识别新型抗防御基因 (ADGs),因为已知的例子有限.
研究的目的:
- 开发一种用于识别古老病毒抗防御基因 (ADG) 的新计算方法.
- 预测和实验验证新的ADG,包括CRISPR和毒素-抗毒素系统的抑制剂.
主要方法:
- 假设古老的ADG是由病毒感染后激活的保存促进子序列调节的.
- 开发了一种基于共识序列的方法,用于识别古代病毒和元基因组中的潜在ADG.
- 实验验证的预测ADG,包括CRISPR抑制剂和毒素抗毒素系统抑制剂.
主要成果:
- 在57个古老病毒和6个元基因组组装基因组中确定了354个潜在的ADG.
- 实验证实了一种新型的CRISPR亚型I-A抑制剂.
- 发现了第一个病毒编码的抑制器,一个古老的毒素-抗毒素免疫系统.
- 确定了可能与抗CRISPR关联蛋白 (Acas) 类似的调节蛋白.
结论:
- 调控序列分析是一种强大的策略,用于在古老和细菌病毒中广泛发现ADG.
- 这种新方法显著扩大了已知的病毒抗防御机制的范围.
- 这些发现有助于更深入地了解病毒与宿主相互作用以及病毒免疫逃避策略.
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