自1980年以来的HIV-1 Vif全球多样性和可能的APOBEC中介反应
Eric Lewitus1,2, Yifan Li1,2, Morgane Rolland1,2
1U.S. Military HIV Research Program, Walter Reed Army Institute of Research, 503 Robert Grant Ave, Silver Spring, MD 20910, USA.
Virus evolution
|January 31, 2025
概括
艾滋病毒-1 Vif 蛋白质对 APOBEC3 酶进行计数. 虽然Vif在进化,但选择并没有针对APOBEC3位点,这表明Vif很少适应这种压力. 艾滋病毒-1的多样性可能来自其他机制.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 进化生物学 进化生物学
背景情况:
- 人类免疫缺陷病毒1型 (HIV-1) Vif蛋白对于病毒复制至关重要.
- 维夫对抗宿主APOBEC3 (由B细胞激活,T细胞天生的免疫) 胺酶,通过诱导G-to-A突变来抑制HIV-1.
- 了解Vif的演变是理解HIV-1适应和流行病传播的关键.
研究的目的:
- 为了研究HIV-1 Vif.的进化动态.
- 为了确定APOBEC3介导的选择性压力对Vif进化的证据.
- 探索Vif多样性与其他HIV-1基因中的APOBEC3诱导突变之间的关系.
主要方法:
- 分析了4612个公开可用的HIV-1序列.
- 使用Hervé平台进行序列分析.
- 研究了10种主要的HIV-1亚型和循环复合形式 (CRF).
主要成果:
- 在亚型和CRF中观察到广泛的,融合的多样化选择.
- 艾滋病毒-1 Vif共识序列显示出随着时间的推移显著的稳定性.
- 随着时间的推移,APOBEC3诱导的替代物增加了HIV-1 env和gag-pol基因,并且与生命多样性相关.
- 选择并没有专门针对Vif.内的APOBEC3相互作用站点.
结论:
- 在HIV-1 Vif中,由APOBEC3驱动的适应似乎并不常见.
- 艾滋病毒-1可能利用APOBEC3诱导的其他基因的替代作为产生病毒多样性的机制.
- 维夫的稳定性表明HIV-1有替代的进化策略来克服宿主防御.
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