时间分辨率光成像和相关冷电子断层扫描研究HIV-1囊的结构变化
Zaida K Rodriguez1,2, Jonathan R Andino-Moncada3, Sergey A Buth4
1The Salk Institute for Biological Sciences, La Jolla, San Diego, California 92037, United States.
ACS nano
|August 22, 2025
概括
一个新的相关光和冷电子显微镜 (CLEM) 工作流程使得人类免疫缺陷病毒1型 (HIV-1) 囊体的详细结构研究成为可能. 这种方法可视化了Lenacapavir等抗病毒药物如何稳定HIV-1囊结构.
科学领域:
- 结构生物学
- 病毒学
- 显微镜
背景情况:
- 人类免疫缺陷病毒1型 (HIV-1) 囊对病毒基因组保护和细胞感染至关重要.
- 抗病毒药物,包括Lenacapavir (LEN),通过改变囊体结构和功能来向HIV-1复制.
- 艾滋病毒-1体的结构特征,它们的分解和抗病毒诱导的稳定性存在重大挑战.
研究的目的:
- 开发一种改进的相关光和冷电子显微镜 (CLEM) 工作流程,以表征HIV-1体形态.
- 为了能够精确地分析HIV-1体,包括用抗病毒药物和细胞代谢物治疗的体.
- 促进对HIV-1囊稳定和拆卸机制的体外研究.
主要方法:
- 开发一种新型的CLEM工作流程,将光HIV-1粒子在冷EM网上的亲和度捕获.
- 对光和冷电子断层扫描 (cryo-ET) 图像进行关联的简化对齐协议的实施.
- 应用CLEM工作流程来分析用莱纳卡巴维尔 (LEN) 和伊诺西托六酸盐 (IP6) 治疗的HIV-1体.
主要成果:
- 建立了可重复的CLEM工作流程,以准确地定位冷ET的囊.
- 在用LEN和IP6治疗后,HIV-1囊网稳定的不同模式得到解决.
- 工作流程证明了与终点冷ET结构相关的时间分辨率光成像.
结论:
- 开发的CLEM工作流程显著推进了HIV-1囊稳定和拆卸的体外结构研究.
- 这种方法提供了对HIV-1囊结构的抗病毒作用机制的见解.
- 在各种条件下,CLEM方法可用于研究其他病毒的结构动态.
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