Cited by 226interferon and immune responsesCytomegalovirus and herpesvirus researchImmune Response and Inflammation

Human Cytomegalovirus Tegument Protein pUL83 Inhibits IFI16-Mediated DNA Sensing for Immune Evasion

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Li, Tuo, Chen, Jin, Cristea, Ileana M.·2013·Cell Host & Microbe

Abstract

Nuclear sensing of viral DNA has emerged as an essential step in innate immune responses against herpesviruses. Here, we provide mechanistic insight into host recognition of human cytomegalovirus (HCMV) and subsequent immune evasion by this prominent DNA virus. We establish that the interferon-inducible protein IFI16 acts as a nuclear DNA sensor following HCMV infection, binding viral DNA and triggering expression of antiviral cytokines via the STING-TBK1-IRF3 signaling pathway. The HCMV tegument protein pUL83 inhibits this response by interacting with the IFI16 pyrin domain, blocking its oligomerization upon DNA sensing and subsequent immune signals. pUL83 disrupts IFI16 by concerted action of its N- and C-terminal domains, in which an evolutionarily conserved N-terminal pyrin association domain (PAD) binds IFI16. Additionally, phosphorylation of the N-terminal domain modulates pUL83-mediated inhibition of pyrin aggregation. Collectively, our data elucidate the interplay between host DNA sensing and HCMV immune evasion, providing targets for restoring antiviral immunity.

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Authors
Li, T., Chen, J., & Cristea, I. M.
Affiliations
Princeton University (US)
Corresponding author
Cristea, Ileana M.
Venue
Cell Host & Microbe
Publisher
Elsevier BV
Published
2013-11
Volume
14
Issue
5
Pages
591-599
ISSN
1931-3128 (ISSN-L)
OpenAlex
W2033448230
Cited by
226
References
30
Citations by year
2026: 3 · 2025: 10 · 2024: 11 · 2023: 11 · 2022: 13 · 2021: 23 · 2020: 21 · 2019: 21 · 2018: 21 · 2017: 19 · 2016: 29 · 2015: 25 · 2014: 18 · 2013: 1
FWCI
13.47
Type
journal article
Language
en
Open access
Locations
  • Cell Host & Microbe (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Institute on Drug Abuse (DP1DA026192)
  • National Institute of Allergy and Infectious Diseases (R21AI102187)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (R21HD073044)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › interferon and immune responses
  • Health Sciences › Medicine › Epidemiology › Cytomegalovirus and herpesvirus research
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
Keywords
human cytomegalovirus, tegument proteins, IFI16, pyrin domain, immune evasion, herpesvirus, protein phosphorylation, antiviral cytokines, innate immunity
MeSH terms
Cell Line, Cytomegalovirus, DNA, Viral, Humans, Nuclear Proteins, Phosphoproteins, Protein Binding, Viral Matrix Proteins, Signal Transduction, Protein Interaction Domains and Motifs, Host-Pathogen Interactions, Immune Evasion

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