鉴定了人类免疫缺陷病毒在核素153上囊的新型相互作用部位
Shunji Li1, Peik Lund-Andersen2, Szu-Huan Wang3
1Department of Biological Sciences, University of Idaho, Moscow, ID 83844, USA.
The Journal of general virology
|May 14, 2025
概括
研究人员在NUP153上发现了一个新的结合位点,CbM.2,它有助于人类免疫缺陷病毒1型 (HIV-1) 进入细胞核. 这一发现增强了我们对HIV-1核进口机制的理解.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 人类免疫缺陷病毒1型 (HIV-1) 需要核进口来感染.
- 病毒囊在将HIV-1基因组传递到细胞核中起着至关重要的作用.
- 已知核素153 (NUP153) 通过其C端体结合基因 (CbM.1) 与HIV-1体相互作用,以促进进入核.
研究的目的:
- 为了识别和描述NUP153和HIV-1囊之间的新型相互作用.
- 为了阐明NUP153的C终端基因在HIV-1核导入中的作用.
- 了解控制HIV-1囊与核孔复合体结合的分子机制.
主要方法:
- 分子建模用于预测结合相互作用.
- 生物化学测定以确认体-NUP153相互作用.
- 艾滋病毒感染测定 (转导,2-LTR圆形形成) 以评估核进口效率.
主要成果:
- 在NUP153中发现了第二个囊结合基因 (CbM.2),与CbM.1的序列相似.
- CbM.2 含有一种FG二基基因,该基因与HIV-1囊蛋白 (CA) 六合体上的一种疏水口袋相互作用.
- 与单独删除CbM.1相比,删除CbM.1和CbM.2都显著降低了体相互作用.
- 在CbM.1中功能丧失突变减少了HIV核进口,而CbM.2突变增加了2-LTR圆形形成,表明不同的角色.
结论:
- NUP153具有一个以前未知的FG二含有基因 (CbM.2) 的基因,该基因与HIV-1囊结合.
- 由于CbM.2与CbM.1在CA六合体上与相同的疏水口袋相互作用,这表明一种合作结合机制.
- 这些发现揭示了NUP153-capsid相互作用介导的HIV-1核进口的新层监管.
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