Cited by 397interferon and immune responsesGenomics and Chromatin DynamicsEnzyme Structure and Function

Structure of IRF-1 with bound DNA reveals determinants of interferon regulation

Escalante, Carlos R., Yie, Junming, Thanos, Dimitris, Aggarwal, Aneel K.·1998·Nature

Abstract

The family of interferon regulatory factor (IRF) transcription factors is important in the regulation of interferons in response to infection by virus and in the regulation of interferon-inducible genes. The IRF family is characterized by a unique 'tryptophan cluster' DNA-binding region. Here we report the crystal structure of the IRF-1 region bound to the natural positive regulatory domain I (PRD I) DNA element from the interferon-beta promoter. The structure provides the first three-dimensional view of a member of the growing IRF family, revealing a new helix-turn-helix motif that latches onto DNA through three of the five conserved tryptophans. The motif selects a short GAAA core sequence through an obliquely angled recognition helix, with an accompanying bending of the DNA axis in the direction of the protein. Together, these features suggest a basis for the occurrence of GAAA repeats within IRF response elements and provide clues to the assembly of the higher-order interferon-beta enhancesome.

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Crossref · 10.1038/34224

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  • The IRF-1-DNA co-crystal structure shows IRF-1 makes extensive contacts with DNA backbone phosphates up to six nucleotides upstream of the GAAA core.

    “The recent IRF-1-DNA co-crystal structure (Escalante et al., 1998) reveals that in addition to the specific base contacts made by the recognition helix, IRF-1 makes extensive contacts with DNA backbone phosphates, even as far as six nucleotides upstream of the GAAA recognition core.”

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Authors
Escalante, C. R., Yie, J., Thanos, D., & Aggarwal, A. K.
Affiliations
  • Icahn School of Medicine at Mount Sinai (US)
  • Columbia University (US)
Corresponding author
Aggarwal, Aneel K.
Venue
Nature
Published
1998-01
Volume
391
Issue
6662
Pages
103-106
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2167065653
Cited by
397
References
29
Citations by year
2026: 9 · 2025: 11 · 2024: 10 · 2023: 12 · 2022: 10 · 2021: 7 · 2020: 21 · 2019: 12 · 2018: 13 · 2017: 21 · 2016: 11 · 2015: 8 · 2014: 14 · 2013: 14 · 2012: 12
FWCI
8.65
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › interferon and immune responses
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
Keywords
IRF1, interferon regulatory factors, transcription factor-DNA complex, helix-turn-helix motif, interferon-beta promoter, DNA bending, interferon regulation, crystal structure
MeSH terms
Amino Acid Sequence, Binding Sites, DNA, DNA-Binding Proteins, Gene Expression Regulation, Models, Molecular, Molecular Sequence Data, Nucleic Acid Conformation, Phosphoproteins, Promoter Regions, Genetic, Protein Conformation, Interferon-beta, Helix-Loop-Helix Motifs, Crystallography, X-Ray, Interferon Regulatory Factor-1

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