抗病毒耐药性的演变捕捉了 chikungunya 病毒包裹糖蛋白之间的短暂的域间功能相互作用
Leandro Battini1,2, Sara A Thannickal3, Malena Tejerina Cibello1
1Instituto de Investigaciones Biotecnológicas, Universidad Nacional de San Martín (UNSAM)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), San Martín, Argentina.
mBio
|October 29, 2025
概括
奇孔古尼亚病毒 (CHIKV) 进入抑制剂揭示了E1和E2包膜蛋白之间的功能联系. 选择的突变克服了融合抑制,为病毒进入机制提供了洞察力.
科学领域:
- 病毒学 病毒学
- 结构生物学 结构生物学
- 分子生物学分子生物学
背景情况:
- 包裹病毒利用融合性包膜蛋白进入宿主细胞,涉及复杂的结构变化.
- 奇孔古尼亚病毒 (CHIKV) 的进入依赖于E1-E2包膜蛋白异构体,它们经历pH依赖的融合.
- 了解融合中间体和域间相互作用的动态对于抗病毒开发至关重要.
研究的目的:
- 研究一种针对膜融合的新型CHIKV进入抑制剂的作用机制.
- 为了阐明CHIKV包膜蛋白E1和E2在融合过程中的功能相互作用.
- 识别赋予抗性的突变,并了解它们对病毒适应性和传染性的影响.
主要方法:
- 在进入抑制剂的选择性压力下CHIKV的实验进化.
- 重组病毒的表型特征,包括融合试验和复制研究.
- 分子动力学模拟用于分析E1-E2异构体中的构造变化.
主要成果:
- 选择压力导致了E1和E2包膜蛋白的突变,使其对抑制剂产生抵抗力.
- 这种双重突变病毒表现出增强的融合能力,并克服了抑制剂介导的融合阻塞.
- 分子动力学模拟显示,选择的残留物调节E1-E2异构体的形状重排,影响聚变pH值.
- 突变影响了病毒复制,在小鼠中传播,在蚊子中感染率.
结论:
- 这项研究揭示了CHIKV E1和E2包膜蛋白之间的功能性域间相互作用,这对于融合至关重要.
- 这些发现为病毒介导的膜融合的分子机制提供了新的见解.
- 这项研究突出了针对病毒与宿主膜融合的潜力,用于针对CHIKV的抗病毒策略.
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