Cited by 168interferon and immune responsesUbiquitin and proteasome pathwaysNF-κB Signaling Pathways

Unanchored K48-Linked Polyubiquitin Synthesized by the E3-Ubiquitin Ligase TRIM6 Stimulates the Interferon-IKKε Kinase-Mediated Antiviral Response

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Rajsbaum, Ricardo, Versteeg, Gijs A., Schmid, Sonja, Maestre, Ana M., Belicha-Villanueva, Alan, Martínez-Romero, Carles, Patel, Jenish R., Morrison, Juliet +8 more·2014·Immunity

Abstract

Type I interferons (IFN-I) are essential antiviral cytokines produced upon microbial infection. IFN-I elicits this activity through the upregulation of hundreds of IFN-I-stimulated genes (ISGs). The full breadth of ISG induction demands activation of a number of cellular factors including the IκB kinase epsilon (IKKε). However, the mechanism of IKKε activation upon IFN receptor signaling has remained elusive. Here we show that TRIM6, a member of the E3-ubiquitin ligase tripartite motif (TRIM) family of proteins, interacted with IKKε and promoted induction of IKKε-dependent ISGs. TRIM6 and the E2-ubiquitin conjugase UbE2K cooperated in the synthesis of unanchored K48-linked polyubiquitin chains, which activated IKKε for subsequent STAT1 phosphorylation. Our work attributes a previously unrecognized activating role of K48-linked unanchored polyubiquitin chains in kinase activation and identifies the UbE2K-TRIM6-ubiquitin axis as critical for IFN signaling and antiviral response.

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Authors
Rajsbaum, R., Versteeg, G. A., Schmid, S., Maestre, A. M., Belicha-Villanueva, A., Martínez-Romero, C., Patel, J. R., Morrison, J., Pisanelli, G., Miorin, L., Laurent-Rolle, M., Moulton, H. M., Stein, D. A., Fernandez-Sesma, A., tenOever, B. R., & García-Sastre, A.
Affiliations
  • Icahn School of Medicine at Mount Sinai (US)
  • University of Vienna (AT)
  • University of Naples Federico II (IT)
  • Oregon State University (US)
Venue
Immunity
Publisher
Elsevier BV
Published
2014-06
Volume
40
Issue
6
Pages
880-895
ISSN
1074-7613 (ISSN-L)
OpenAlex
W1998041119
Cited by
168
References
40
Citations by year
2026: 6 · 2025: 16 · 2024: 22 · 2023: 18 · 2022: 12 · 2021: 14 · 2020: 7 · 2019: 16 · 2018: 8 · 2017: 13 · 2016: 20 · 2015: 12 · 2014: 4
FWCI
7.46
Type
journal article
Language
en
Open access
Locations
  • Immunity (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • National Institute on Drug Abuse (R01DA033773)
  • National Institute of Allergy and Infectious Diseases (HHSN272201000054C, U01AI095611, HHSN266200700010C, P01AI090935, U19AI083025, R01AI080624, R01AI073450, 1P01AI90935, U19AI106754)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › interferon and immune responses
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › NF-κB Signaling Pathways
Keywords
E3 ubiquitin ligase, K48-linked polyubiquitin, IKKε, type I interferon signaling, interferon-stimulated genes, STAT1 phosphorylation, UBE2K, kinase activation, antiviral response
MeSH terms
Tripartite Motif Proteins, Animals, Antiviral Agents, Cells, Cultured, Enzyme Activation, Humans, Interferon Type I, Phosphorylation, Signal Transduction, Polyubiquitin, RNA Interference, RNA, Small Interfering, Ubiquitin-Conjugating Enzymes, Ubiquitin-Protein Ligases, STAT1 Transcription Factor, Mice, I-kappa B Kinase, Janus Kinase 1

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