Host restriction of murine gammaherpesvirus 68 replication by human APOBEC3 cytidine deaminases but not murine APOBEC3.

Host restriction of murine gammaherpesvirus 68 replication by human APOBEC3 cytidine deaminases but not murine APOBEC3.
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DOI:
10.1016/j.virol.2014.02.022
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发表时间:
2014-04
期刊:
影响因子:
3.7
通讯作者:
Krug, Laurie T.
Krug, Laurie T.
中科院分区:
医学3区
文献类型:
--
作者:
Minkah, Nana;Chavez, Kevin;Shah, Parth;MacCarthy, Thomas;Chen, Hui;Landau, Nathaniel;Krug, Laurie T.

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人类编码七种APOBEC3 (A3A-A3H)胞苷脱氨酶蛋白,它们在表达谱、首选核苷酸识别序列和限制RNA和DNA病毒的能力方面存在差异。我们在许多疱疹病毒基因组中发现了APOBEC3热点。为了确定宿主APOBEC3对体内疱疹病毒生物学的影响,我们检测了小鼠APOBEC3 (mA3)是否限制小鼠γ -疱疹病毒68 (MHV68)。转染病毒基因组后,病毒复制被几种人APOBEC3蛋白破坏,但不被mA3蛋白破坏。在A3A和A3B活性位点突变后,限制被取消。有趣的是,如果传染性DNA由病毒粒子传递,A3A、A3B、A3C和A3DE对病毒的限制就会消失。MHV68的发病机制,包括肺复制和脾潜伏期,在缺乏mA3的小鼠中没有改变。我们推断mA3不限制野生型MHV68,人类a3的限制可能在疱疹病毒复制过程中受到限制。
Humans encode seven APOBEC3 (A3A-A3H) cytidine deaminase proteins that differ in their expression profiles, preferred nucleotide recognition sequence and capacity for restriction of RNA and DNA viruses. We identified APOBEC3 hotspots in numerous herpesvirus genomes. To determine the impact of host APOBEC3 on herpesvirus biology in vivo, we examined whether murine APOBEC3 (mA3) restricts murine gammaherpesvirus 68 (MHV68). Viral replication was impaired by several human APOBEC3 proteins, but not mA3, upon transfection of the viral genome. The restriction was abrogated upon mutation of the A3A and A3B active sites. Interestingly, virus restriction by A3A, A3B, A3C, and A3DE was lost if the infectious DNA was delivered by the virion. MHV68 pathogenesis, including lung replication and splenic latency, was not altered in mice lacking mA3. We infer that mA3 does not restrict wild type MHV68 and restriction by human A3s may be limited in the herpesvirus replication process.
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