TY - JOUR
T1 - The DEAD box RNA helicase DDX42 is an intrinsic inhibitor of positive-strand RNA viruses
AU - Bonaventure, Boris
AU - Rebendenne, Antoine
AU - Chaves Valadão, Ana Luiza
AU - Arnaud-Arnould, Mary
AU - Gracias, Ségolène
AU - Garcia de Gracia, Francisco
AU - McKellar, Joe
AU - Labaronne, Emmanuel
AU - Tauziet, Marine
AU - Vivet-Boudou, Valérie
AU - Bernard, Eric
AU - Briant, Laurence
AU - Gros, Nathalie
AU - Djilli, Wassila
AU - Courgnaud, Valérie
AU - Parrinello, Hugues
AU - Rialle, Stéphanie
AU - Blaise, Mickaël
AU - Lacroix, Laurent
AU - Lavigne, Marc
AU - Paillart, Jean-Christophe
AU - Ricci, Emiliano P
AU - Schulz, Reiner
AU - Jouvenet, Nolwenn
AU - Moncorgé, Olivier
AU - Goujon, Caroline
PY - 2022/9/26
Y1 - 2022/9/26
N2 - Genome-wide screens are powerful approaches to unravel regulators of viral infections. Here, a CRISPR screen identifies the RNA helicase DDX42 as an intrinsic antiviral inhibitor of HIV-1. Depletion of endogenous DDX42 increases HIV-1 DNA accumulation and infection in cell lines and primary cells. DDX42 overexpression inhibits HIV-1 infection, whereas expression of a dominant-negative mutant increases infection. Importantly, DDX42 also restricts LINE-1 retrotransposition and infection with other retroviruses and positive-strand RNA viruses, including CHIKV and SARS-CoV-2. However, DDX42 does not impact the replication of several negative-strand RNA viruses, arguing against an unspecific effect on target cells, which is confirmed by RNA-seq analysis. Proximity ligation assays show DDX42 in the vicinity of viral elements, and cross-linking RNA immunoprecipitation confirms a specific interaction of DDX42 with RNAs from sensitive viruses. Moreover, recombinant DDX42 inhibits HIV-1 reverse transcription in vitro. Together, our data strongly suggest a direct mode of action of DDX42 on viral ribonucleoprotein complexes. Our results identify DDX42 as an intrinsic viral inhibitor, opening new perspectives to target the life cycle of numerous RNA viruses. [Abstract copyright: © 2022 The Authors. Published under the terms of the CC BY NC ND 4.0 license.]
AB - Genome-wide screens are powerful approaches to unravel regulators of viral infections. Here, a CRISPR screen identifies the RNA helicase DDX42 as an intrinsic antiviral inhibitor of HIV-1. Depletion of endogenous DDX42 increases HIV-1 DNA accumulation and infection in cell lines and primary cells. DDX42 overexpression inhibits HIV-1 infection, whereas expression of a dominant-negative mutant increases infection. Importantly, DDX42 also restricts LINE-1 retrotransposition and infection with other retroviruses and positive-strand RNA viruses, including CHIKV and SARS-CoV-2. However, DDX42 does not impact the replication of several negative-strand RNA viruses, arguing against an unspecific effect on target cells, which is confirmed by RNA-seq analysis. Proximity ligation assays show DDX42 in the vicinity of viral elements, and cross-linking RNA immunoprecipitation confirms a specific interaction of DDX42 with RNAs from sensitive viruses. Moreover, recombinant DDX42 inhibits HIV-1 reverse transcription in vitro. Together, our data strongly suggest a direct mode of action of DDX42 on viral ribonucleoprotein complexes. Our results identify DDX42 as an intrinsic viral inhibitor, opening new perspectives to target the life cycle of numerous RNA viruses. [Abstract copyright: © 2022 The Authors. Published under the terms of the CC BY NC ND 4.0 license.]
KW - DDX42 DEAD-box RNA helicase
KW - RNA viruses
KW - intrinsic immunity
KW - viral inhibition
U2 - 10.15252/embr.202154061
DO - 10.15252/embr.202154061
M3 - Article
C2 - 36161446
SN - 1469-3178
SP - e54061
JO - EMBO reports
JF - EMBO reports
ER -