酸化使SARS-CoV-2核体蛋白在两个膜相关的凝结态之间切换
Bruna Favetta1, Huan Wang2, Jasmine Cubuk3
1Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08854.
bioRxiv : the preprint server for biology
|October 28, 2024
概括
酸化改变了SARS-CoV-2核体蛋白 (N),改变了它与RNA和膜的相互作用. 这种分子开关影响病毒生命周期功能,并提供潜在的COVID-19治疗点.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 生物物理学的生物物理.
背景情况:
- 在SARS-CoV-2核蛋白 (N) 对于病毒转录和基因组包装至关重要.
- 假设N的功能是由酸化诱导的结构变化调节的.
- 了解这些变化是破译病毒生命周期的关键.
研究的目的:
- 调查酸化如何影响SARS-CoV-2 N蛋白质的结构状态.
- 为了确定酸化对N蛋白与RNA和膜的相互作用的影响.
- 探索由此产生的N-RNA生物分子凝聚物的物质特性变化.
主要方法:
- 使用N蛋白和RNA进行生物分子凝聚物形成试验.
- 对凝结物 - 膜相互作用的分析.
- 风学测量以评估材料特性 (粘度,弹性).
- 生物化学试验用于研究蛋白质-RNA结合亲缘关系.
主要成果:
- 酸化N蛋白 (pN) 改变了凝聚物-膜相互作用,形成薄膜,而不是被吞的结构.
- 与未经修改的N冷凝物相比,pN冷凝物具有较低的粘度和弹性.
- 酸化削弱了N蛋白和非结构化RNA之间的结合.
- 在pN的氨酸/氨酸丰富区域的形态变化增强了单体-单体相互作用,同时减少了非特异性RNA结合.
结论:
- 酸化作为一个开关,调节SARS-CoV-2 N蛋白质的形状,材料特性和膜协会.
- 这些依赖酸化的变化影响了N在病毒生命周期中的作用.
- 这些发现提供了针对COVID-19中N蛋白功能的潜在治疗策略的见解.
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