关于布尼亚病毒复制及其由vRNA促进体对其进行调节的结构洞察
Piotr Gerlach1, Hélène Malet1, Stephen Cusack1
1European Molecular Biology Laboratory, Grenoble Outstation, 71 Avenue des Martyrs, CS90181, 38042 Grenoble Cedex 9, France; Unit of Virus Host-Cell Interactions (UMI 3265), University Grenoble Alpes-EMBL-CNRS, 71 Avenue des Martyrs, CS90181, 38042 Grenoble Cedex 9, France.
Cell
|May 26, 2015
概括
对细分负链RNA病毒 (sNSV) 聚合酶的结构洞察力揭示了它们如何合成病毒RNA (vRNA). 拉克罗斯脊髓炎病毒 (LACV) 聚合酶结构阐明了RNA结合和复制机制,有助于抑制剂的发展.
科学领域:
- 结构生物学是结构生物学.
- 病毒学 病毒学
- RNA合成的分子机制
背景情况:
- 分段负链RNA病毒 (sNSV) 引起人类重大疾病.
- 病毒RNA (vRNA) 合成是由核糖核蛋白颗粒 (RNP) 内的病毒聚合酶协调的.
- 了解sNSV聚合酶的功能对于开发抗病毒疗法至关重要.
研究的目的:
- 为了确定拉克罗斯骨髓病毒 (LACV) 聚合酶的原子分辨率结构.
- 阐明通过sNSV聚合酶进行vRNA转录和复制的机制.
- 为开发新型抗病毒复制抑制剂提供见解.
主要方法:
- 低温电子显微镜 (cryo-EM) 用于研究apo-LACV聚合酶结构.
- 针对vRNA结合的LACV聚合酶结构的X射线晶体学.
- 对vRNA结合和活性部位构成的结构分析.
主要成果:
- 确定了与阿波和vRNA结合的LACV聚合酶的原子分辨率结构.
- 在vRNA的3'和5'端与聚合酶的不同部位结合.
- 5'vRNA末端,作为一个干循环,全osterically 调节活动位点循环.
- 确定了不同的模板和产品退出道,使得复制模型成为可能.
- LACV聚合酶与流感聚合酶具有结构和vRNA结合的相似之处,这表明它们具有共同的进化起源.
结论:
- 这些结构为sNSVRNA合成提供了前所未有的洞察力.
- 建议在RNP中提供模板导向复制的详细模型.
- 保存的特征表明所有sNSV聚合酶的共同进化起源和机制.
- 这些发现将促进对病原性sNSVs的复制抑制剂的设计.
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