HIV-1 Vif adaptation to human APOBEC3H haplotypes.

HIV-1 Vif adaptation to human APOBEC3H haplotypes.
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HIV-1 Vif 适应人类 APOBEC3H 单倍型。

DOI:
10.1016/j.chom.2013.09.006
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发表时间:
2013
影响因子:
30.3
通讯作者:
Simon,Viviana
Simon,Viviana
中科院分区:
医学1区
文献类型:
--
作者:
Ooms,Marcel;Brayton,Bonnie;Letko,Michael;Maio,SusanM;Pilcher,ChristopherD;Hecht,FrederickM;Barbour,JasonD;Simon,Viviana

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几种人APOBEC 3脱氨酶可以在体外抑制HIV-1复制。HIV-1 Vif通过靶向APOBEC 3进行蛋白酶体降解来抵消这种限制。人APOBEC 3 H(A3 H)具有高度多态性,其天然变体在体外抗HIV-1活性方面存在显著差异。为了研究HIV-1在自然感染背景下对A3 H活性变化的适应性,我们确定了76名最近感染HIV-1患者的A3 H单倍型和Vif序列。我们检测到A3 H特异性Vif变化,表明病毒适应。患者来源的Vif序列被用于工程化病毒,这些病毒在对抗A3 H的能力上特异性不同。这些Vif变异体病毒在天然表达活性或非活性A3 H单倍型的原代T细胞中的复制表明内源性表达的A3 H限制HIV-1复制。来自A3 H限制性病毒的前病毒DNA在A3 H特异性GA二核苷酸背景下显示高水平的G至A突变。总之,我们的数据验证了内源性水平表达的A3 H是真正的HIV-1限制因子。
Several human APOBEC3 deaminases can inhibit HIV-1 replication in vitro. HIV-1 Vif counteracts this restriction by targeting APOBEC3 for proteasomal degradation. Human APOBEC3H (A3H) is highly polymorphic, with natural variants differing considerably in anti-HIV-1 activity in vitro. To examine HIV-1 adaptation to variation in A3H activity in a natural infection context, we determined the A3H haplotypes and Vif sequences from 76 recently infected HIV-1 patients. We detected A3H-specific Vif changes suggesting viral adaptation. The patient-derived Vif sequences were used to engineer viruses that specifically differed in their ability to counteract A3H. Replication of these Vif-variant viruses in primary T cells naturally expressing active or inactive A3H haplotypes showed that endogenously expressed A3H restricts HIV-1 replication. Proviral DNA from A3H-restricted viruses showed high levels of G-to-A mutations in an A3H-specific GA dinucleotide context. Taken together, our data validate A3H expressed at endogenous levels as a bona fide HIV-1 restriction factor.
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DOI: --
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