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Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Nature communications - 04 May 2022

Mac Kain A, Maarifi G, Aicher SM, Arhel N, Baidaliuk A, Munier S, Donati F, Vallet T, Tran QD, Hardy A, Chazal M, Porrot F, OhAinle M, Carlson-Stevermer J, Oki J, Holden K, Zimmer G, Simon-Lorière E, Bruel T, Schwartz O, van der Werf S, Jouvenet N, Nisole S, Vignuzzi M, Roesch F,

Link to Pubmed [PMID] – 35508460

Link to DOI – 10.1038/s41467-022-30134-9

Nat Commun 2022 May; 13(1): 2442

Interferon restricts SARS-CoV-2 replication in cell culture, but only a handful of Interferon Stimulated Genes with antiviral activity against SARS-CoV-2 have been identified. Here, we describe a functional CRISPR/Cas9 screen aiming at identifying SARS-CoV-2 restriction factors. We identify DAXX, a scaffold protein residing in PML nuclear bodies known to limit the replication of DNA viruses and retroviruses, as a potent inhibitor of SARS-CoV-2 and SARS-CoV replication in human cells. Basal expression of DAXX is sufficient to limit the replication of SARS-CoV-2, and DAXX over-expression further restricts infection. DAXX restricts an early, post-entry step of the SARS-CoV-2 life cycle. DAXX-mediated restriction of SARS-CoV-2 is independent of the SUMOylation pathway but dependent on its D/E domain, also necessary for its protein-folding activity. SARS-CoV-2 infection triggers the re-localization of DAXX to cytoplasmic sites and promotes its degradation. Mechanistically, this process is mediated by the viral papain-like protease (PLpro) and the proteasome. Together, these results demonstrate that DAXX restricts SARS-CoV-2, which in turn has evolved a mechanism to counteract its action.

https://pubmed.ncbi.nlm.nih.gov/35508460