艾格特病毒菌体AV101识别了四种不同的O-抗原,感染了多种不同的E. 大肠杆菌
Anders Nørgaard Sørensen1, Dorottya Kalmár1, Veronika Theresa Lutz1
1Department of Veterinary and Animal Sciences, University of Copenhagen, Stigbøjlen 4, 1870 Frederiksberg C, Denmark.
microLife
|January 18, 2024
概括
艾格特病毒菌体具有多种不同的尾尖蛋白 (TSPs),这些蛋白质决定了大肠杆菌中宿主特异性. 这些TSP可能源于与其他菌体的重组事件,为菌体进化提供了洞察力.
科学领域:
- 微生物学 微生物学
- 病毒学 病毒学
- 基因组学就是基因组学.
背景情况:
- 在Agtrevirus属中的菌体感染了各种Enterobacteriaceae物种.
- 艾格特病毒菌体表达多个尾尖蛋白 (TSPs),但它们的遗传多样性和宿主识别知之甚少.
研究的目的:
- 为了研究Agtrevirus菌体的各种宿主范围的基因差异.
- 描述Agtrevirus菌体的宿主识别机制,重点关注它们的TSP.
主要方法:
- 14个Agtrevirus菌体的比较基因组学.
- 艾格特病毒AV101及其四个独特的TSP的特征.
- 在体外测试中使用纯化的TSP来确定O-抗原结合.
- 进行BLASTp分析,将TSP序列与已知的菌体TSP进行比较.
主要成果:
- 对比基因组学揭示了Agtrevirus菌体之间的有限遗传差异,除了高度多样化的TSP基因集群.
- 阿格特病毒AV101编码了四个独特的TSP,这些TSP可以识别大肠杆菌的特定O抗原 (O8,O82,O153,O159).
- 纯化的TSP抑制了特定宿主的菌体感染,证实了它们在宿主识别中的作用.
- TSP受体结合域与大肠杆菌和其他毒性菌体的prophages和其他毒性菌体具有相似性.
结论:
- 艾格特病毒TSP的多样性有助于它们在Enterobacteriaceae中的广泛宿主范围.
- 艾格特病毒菌体很可能通过横向基因转移获得它们的TSP受体结合域,可能是通过与菌体或其他菌体重组.
- 这项研究增强了对Agtrevirus中TSP介导的宿主识别的理解,并提供了对Ackermannviridae菌体中受体结合域的进化起源的见解.
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