艾滋病毒-1 Nef 通过招募 Src 激酶来酸化宿主蛋白质来激活前病毒性 DNA 转录,从而影响 Nef 关联因子 1 的病毒性限制性功能
Tian-Jiao Fan1,2, Chengzuo Xie3,4, Lisha Li1
1Pingyuan Laboratory, State Key Laboratory of Antiviral Drugs, Henan Normal University, Xinxiang, China.
Journal of virology
|April 24, 2025
概括
艾滋病毒-1 Nef 蛋白通过招募 Src 激酶来酸化 Naf1.1,从而激活病毒前病毒DNA转录. 这种酸化将Naf1转化为Naf1.
科学领域:
- 病毒学和分子生物学
- 免疫学 免疫学 免疫学
- 细胞信号传输 细胞信号传输
背景情况:
- 艾滋病毒-1辅助蛋白Nef对于病毒病原发生至关重要,调解免疫逃避并增强感染力.
- 尼夫在潜在感染中调节病毒前DNA转录的确切机制尚不完全理解.
- 与Nef相互作用的宿主因素在调节病毒复制方面发挥着重要作用.
研究的目的:
- 阐明Nef在激活潜感染细胞中的HIV-1前病毒DNA转录中的作用.
- 调查Nef影响HIV-1转录的分子机制.
- 探索宿主蛋白 Naf1 在 HIV-1 复制中的双重功能.
主要方法:
- 调查了Src家族企业 (SFKs) 成员Src被Nef招募的情况.
- 分析了PI3K/AKT/mTOCR1/CDK9细胞通路的激活.
- 检查了Naf1 (Nef相关因子1) 的酸化状态及其功能后果.
主要成果:
- Nef通过招募Src来激活HIV-1前病毒DNA转录,这刺激PI3K/AKT/mTOCR1/CDK9通路.
- 已知抑制HIV-1转录的Nef相关因子1 (Naf1) 对于Nef介导激活至关重要.
- 在Tyrosine-552中,Nef招募的Src化了Naf1,将其镇压功能转换为在激活转录中发挥合作作用.
结论:
- 尼夫通过一种涉及Src酶和PI3K/AKT/mTOCR1/CDK9通路的机制激活HIV-1前病毒DNA转录.
- Naf1表现出双重功能,作为抑制剂,但在酸化时与Nef协调,以激活转录.
- 这项研究揭示了病毒蛋白 (Nef) 与宿主因子 (Naf1) 之间在调节HIV-1复制过程中的新奇相互作用.
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