Abstract：
:Outbreaks of viral infections are a global health burden. Although type I interferon (IFN-I) exerts broad-spectrum antiviral effects, its antiviral efficacy in host cells is largely restricted by viruses. How the antiviral efficacy of IFN-I can be improved remains to be explored. Here, we identified the ADP-ribosyltransferase poly(ADP-ribose) polymerase family member 11 (PARP11) as a potent regulator of IFN-I antiviral efficacy. PARP11 does not restrict IFN-I production induced by vesicular stomatitis virus or Sendai virus but inhibits the strength of IFN-I-activated signalling. Mechanistically, PARP11 mono-ADP-ribosylates the ubiquitin E3 ligase β-transducin repeat-containing protein (β-TrCP). Mono-ADP-ribosylation of β-TrCP promotes IFNα/β receptor subunit 1 (IFNAR1) ubiquitination and degradation. Moreover, PARP11 expression is upregulated by virus infections, including vesicular stomatitis virus, herpes simplex virus-1 and influenza A virus, thus promoting ADP-ribosylation-mediated viral evasion. We further highlight the potential for repurposing clinical ADP-ribosylation inhibitors. We found that rucaparib can target PARP11 to stabilize IFNAR1 and therefore exhibits efficient enhancement of IFN-I signalling and the host antiviral response. Consequently, rucaparib renders mice more resistant to viral infection. Our study updates the understanding of how β-TrCP regulates its substrates and may provide a druggable target for improving IFN antiviral efficacy.
journal_name
Nat Microbioljournal_title
Nature microbiologyauthors
Guo T,Zuo Y,Qian L,Liu J,Yuan Y,Xu K,Miao Y,Feng Q,Chen X,Jin L,Zhang L,Dong C,Xiong S,Zheng Hdoi
10.1038/s41564-019-0428-3subject
Has Abstractpub_date
2019-11-01 00:00:00pages
1872-1884issue
11issn
2058-5276pii
10.1038/s41564-019-0428-3journal_volume
4pub_type
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