登革热病毒的结构动力学非结构性5 (NS5) 与促进体干环A (SLA) 的相互作用
Juliet O Obi1, Kyle C Kihn1, Linfah McQueen1
1Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, Maryland, 21201, USA.
bioRxiv : the preprint server for biology
|December 16, 2024
概括
登革热病毒NS5蛋白与干环A促进体相互作用,这对病毒RNA合成至关重要. 了解它的结构动态有助于开发针对登革热NS5的抗病毒药物.
科学领域:
- 病毒学 病毒学
- 结构生物学 结构生物学
- 药物发现 药物发现 药物发现
背景情况:
- 登革热病毒 (DENV) NS5蛋白对于病毒RNA合成至关重要,也是抗病毒疗法的关键标.
- NS5与5'-UTR干环A (SLA) 促进体相互作用,启动病毒基因组复制.
研究的目的:
- 阐明DENV血清型2 NS5 (DENV2 NS5) 和SLA相互作用的结构动态和分子细节.
- 为了研究DENV2 NS5.5中SLA诱导的构造变化.
主要方法:
- 表面等离子体共振 (SPR) 是一种
- -交换质谱法 (HDX-MS) 是一种质谱法.
- 计算建模计算建模
- 低温电子显微镜 (cryo-EM) 单颗粒分析
主要成果:
- DENV2 NS5将SLA结合在密闭的构造中,在甲基转移酶 (MTase) 和依赖RNA的RNA聚合酶 (RdRp) 域之间进行域间合作.
- HDX-MS揭示了DENV2 NS5.5的MTase和RdRp域中的SLA诱导的构造变化.
- 冷-EM结构提供了DENV2 NS5-SLA复合物的第一个可视化,显示了DENV血清型中保存的结合模式.
结论:
- 这项研究增强了对SLA结合过程中登革热NS5的构造动态的理解.
- 这些发现支持开发针对登革热NS5.5特定构造状态的抗病毒策略.
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