N.sup.6-methyladenosine reader protein YTHDC1 regulates influenza A virus NS segment splicing and replication

N.sup.6 -methyladenosine (m.sup.6 A) modification on viral RNAs has a profound impact on infectivity. m.sup.6 A is also a highly pervasive modification for influenza viral RNAs. However, its role in virus mRNA splicing is largely unknown. Here, we identify the m.sup.6 A reader protein YTHDC1 as a ho...

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Bibliographic Details
Published inPLoS pathogens Vol. 19; no. 4; p. e1011305
Main Authors Zhu, Yinxing, Wang, Ruifang, Zou, Jiahui, Tian, Shan, Yu, Luyao, Zhou, Yuanbao, Ran, Ying, Jin, Meilin, Chen, Huanchun, Zhou, Hongbo
Format Journal Article
LanguageEnglish
Published Public Library of Science 13.04.2023
Subjects
Analysis
Dosage and administration
Health aspects
Influenza
Influenza vaccines
Influenza viruses
Prevention
Risk factors
RNA
RNA splicing
China
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Summary:N.sup.6 -methyladenosine (m.sup.6 A) modification on viral RNAs has a profound impact on infectivity. m.sup.6 A is also a highly pervasive modification for influenza viral RNAs. However, its role in virus mRNA splicing is largely unknown. Here, we identify the m.sup.6 A reader protein YTHDC1 as a host factor that associates with influenza A virus NS1 protein and modulates viral mRNA splicing. YTHDC1 levels are enhanced by IAV infection. We demonstrate that YTHDC1 inhibits NS splicing by binding to an NS 3' splicing site and promotes IAV replication and pathogenicity in vitro and in vivo. Our results provide a mechanistic understanding of IAV-host interactions, a potential therapeutic target for blocking influenza virus infection, and a new avenue for the development of attenuated vaccines.
ISSN:1553-7366
1553-7374
DOI:10.1371/journal.ppat.1011305