APOBEC3-mediated restriction of RNA virus replication.

APOBEC3-mediated restriction of RNA virus replication.
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DOI:
10.1038/s41598-018-24448-2
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发表时间:
2018-04-13
期刊:
影响因子:
4.6
通讯作者:
Pyrc K
Pyrc K
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Milewska A;Kindler E;Vkovski P;Zeglen S;Ochman M;Thiel V;Rajfur Z;Pyrc K

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APOBEC3家族成员是胞苷脱氨酶,在逆转录病毒和反转录转座子感染的内在反应中发挥作用,并在控制其他DNA病毒,如疱疹病毒、细小病毒和乙肝病毒中发挥作用。虽然APOBEC3成员对病毒DNA的影响已经被证明,但尚不清楚它们是否通过胞苷脱氨基来编辑RNA基因组。在这里,我们研究了APOBEC3介导的对冠状病毒科的限制。在体外实验中,三种人APOBEC3蛋白(A3C、A3F和A3H)抑制了HCoV-NL63的感染并限制了后代病毒的产生,但不会导致冠状病毒基因组的过度突变。APOBEC3介导的限制部分依赖于酶的活性,并通过使用酶失活的APOBEC3来减少。此外,APOBEC3蛋白与冠状病毒核蛋白结合,这种相互作用也影响病毒的复制。尽管依赖脱氨酶抑制冠状病毒复制的确切分子机制仍不清楚,但我们的结果加深了我们对APOBEC介导的限制RNA病毒感染的理解。
APOBEC3 family members are cytidine deaminases with roles in intrinsic responses to infection by retroviruses and retrotransposons, and in the control of other DNA viruses, such as herpesviruses, parvoviruses and hepatitis B virus. Although effects of APOBEC3 members on viral DNA have been demonstrated, it is not known whether they edit RNA genomes through cytidine deamination. Here, we investigated APOBEC3-mediated restriction of Coronaviridae. In experiments in vitro, three human APOBEC3 proteins (A3C, A3F and A3H) inhibited HCoV-NL63 infection and limited production of progeny virus, but did not cause hypermutation of the coronaviral genome. APOBEC3-mediated restriction was partially dependent on enzyme activity, and was reduced by the use of enzymatically inactive APOBEC3. Moreover, APOBEC3 proteins bound to the coronaviral nucleoprotein, and this interaction also affected viral replication. Although the precise molecular mechanism of deaminase-dependent inhibition of coronavirus replication remains elusive, our results further our understanding of APOBEC-mediated restriction of RNA virus infections.
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