数字农科院2.0

N6-methyladenosine modification of the mRNA for a key gene in purine nucleotide metabolism regulates virus proliferation in an insect vector

文献类型： 外文期刊

作者： Zhu M.;Wu N.;Zhong J.;Chen C.;Liu W.;Ren Y.;Wang X.;Jin H.

作者机构：

关键词： CP: Microbiology;inosine monophosphate dehydrogenase;methyltransferase-like protein 3;N6-methyladenosine modification;rice stripe virus;viral transmission;YTHDF3

期刊名称： Cell Reports

ISSN： 2211-1247

年卷期： 2024 年 43 卷 2 期

页码：

收录情况： SCIE（2024版）

摘要： The titer of viruses that persist and propagate in their insect vector must be high enough for transmission yet not harm the insect, but the mechanism of this dynamic balance is unclear. Here, expression of inosine monophosphate dehydrogenase (LsIMPDH), a rate-limiting enzyme for guanosine triphosphate (GTP) synthesis, is shown to be downregulated by increased levels of N6-methyladenosine (m6A) on LsIMPDH mRNA in rice stripe virus (RSV)-infected small brown planthoppers (SBPHs; Laodelphax striatellus), the RSV vector, which decreases GTP content, thus limiting viral proliferation. Moreover, planthopper methyltransferase-like protein 3 (LsMETTL3) and m6A reader protein LsYTHDF3 are found to catalyze and recognize the m6A on LsIMPDH mRNA, respectively, and cooperate in destabilizing LsIMPDH transcripts. Co-silencing assays show that negative regulation of viral proliferation by both LsMETTL3 and LsYTHDF3 is partially dependent on LsIMPDH. This distinct mechanism limits virus replication in an insect vector, providing a potential gene target to block viral transmission. © 2024 The Author(s)

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