MIMIVIRE是仿真病毒中的一种防御系统,可以对病毒细胞产生抵抗力
Anthony Levasseur1,2, Meriem Bekliz1,2, Eric Chabrière1,2
1Aix-Marseille Université, Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63, CNRS 7278, IRD 198, INSERM U1095, Marseille, France.
Nature
|March 3, 2016
概括
巨型病毒具有一种新的防御系统,即MIMIVIRE,能够抵抗病毒感染. 这种基于核酸的免疫力挑战了传统的病毒定义,并为病毒进化提供了洞察力.
科学领域:
- 病毒学
- 微生物学
- 遗传学
背景情况:
- 巨型病毒表现出独特的特征,挑战传统的病毒定义.
- 病毒细胞是感染其他病毒的病毒,包括像模仿病毒这样的巨型病毒.
- 米米病毒对病毒细胞感染具有特定的抗药性.
研究的目的:
- 研究模拟病毒对病毒细胞感染的防御机制.
- 为了确定仿真病毒对Zamilon病毒细胞的耐药性的基因.
- 在巨型病毒中探索CRISPR-Cas系统的潜力.
主要方法:
- 45种新型仿真病毒的基因组测序.
- 对60种仿真病毒基因组进行比较基因组分析以确定Zamilon特异序列.
- 通过沉默基因和评估病毒易感性,对"仿真病毒病毒细胞抗性元素" (MIMIVIRE) 的功能分析.
主要成果:
- 仿真病毒系A菌株对Zamilon病毒细胞有抗性.
- 耐药菌株含有Zamilon衍生的序列插入,称为MIMIVIRE,在一个操作子.
- MIMIVIRE基因表现出核酶和酶功能,这表明核酸降解.
- 沉默MIMIVIRE可以恢复仿真病毒对Zamilon的敏感性.
结论:
- 咪咪病毒具有一种基于核酸的新型免疫系统,MIMIVIRE,可提供对病毒细胞感染的防御.
- MIMIVIRE的功能与细菌的CRISPR- Cas系统相似,向外来核酸.
- 这一发现扩大了我们对病毒防御机制和巨型病毒生物学复杂性的理解.
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