Geminiviruses employ host DNA glycosylases to subvert DNA methylation-mediated defense.

Geminiviruses employ host DNA glycosylases to subvert DNA methylation-mediated defense.
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双生病毒利用宿主DNA糖基化酶来破坏DNA甲基化介导的防御。

DOI:
10.1038/s41467-022-28262-3
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发表时间:
2022-01-31
影响因子:
16.6
通讯作者:
Zhou X
Zhou X
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Gui X;Liu C;Qi Y;Zhou X

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DNA甲基化是一种表观遗传机制,在基因调控和转座子沉默中起重要作用。活跃的DNA去甲基化已经进化到在许多内源性位点抵消DNA甲基化。在这里,我们报道了活性DNA去甲基化也针对病毒DNA,番茄黄卷叶中国病毒(TYLCCNV)及其卫星番茄黄卷叶中国betassatellite (TYLCCNB),以促进其毒力。研究人员发现,由TYLCCNB编码的βC1蛋白可以与benthamiana中的ro1样DNA糖基酶和拟南芥中的DEMETER (DME) DNA糖基酶相互作用。βC1与二甲醚的相互作用促进DNA糖基酶活性,降低病毒DNA甲基化,增强病毒毒力。这些发现表明,活跃的DNA去甲基化可以被一种病毒蛋白调节,从而破坏DNA甲基化介导的防御。植物通过严格调控DNA甲基化来调控基因表达。在这里,作者发现番茄黄卷叶病毒βC1蛋白与植物DNA糖基酶相互作用,促进病毒DNA的去甲基化,增强毒力。
DNA methylation is an epigenetic mechanism that plays important roles in gene regulation and transposon silencing. Active DNA demethylation has evolved to counterbalance DNA methylation at many endogenous loci. Here, we report that active DNA demethylation also targets viral DNAs, tomato yellow leaf curl China virus (TYLCCNV) and its satellite tomato yellow leaf curl China betasatellite (TYLCCNB), to promote their virulence. We demonstrate that the βC1 protein, encoded by TYLCCNB, interacts with a ROS1-like DNA glycosylase in Nicotiana benthamiana and with the DEMETER (DME) DNA glycosylase in Arabidopsis thaliana. The interaction between βC1 and DME facilitates the DNA glycosylase activity to decrease viral DNA methylation and promote viral virulence. These findings reveal that active DNA demethylation can be regulated by a viral protein to subvert DNA methylation-mediated defense. Plants tightly regulate DNA methylation to regulate gene expression. Here, the authors show that the tomato yellow leaf curl China virus βC1 protein interacts with plant DNA glycosylases to promote demethylation of viral DNA and promote virulence.
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