1IF1

INTERFERON REGULATORY FACTOR 1 (IRF-1) COMPLEX WITH DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.242 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

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

Escalante, C.R.Yie, J.Thanos, D.Aggarwal, A.K.

(1998) Nature 391: 103-106

  • DOI: 10.1038/34224

  • PubMed 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 't ...

    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.


    Related Citations: 
    • Expression, Purification, and Co-Crystallization of Irf-1 Bound to the Interferon-Beta Element Prdi
      Escalante, C.R.,Yie, J.,Thanos, D.,Aggarwal, A.K.
      (1997) FEBS Lett. 414: 219


    Organizational Affiliation

    Structural Biology Program, Department of Physiology and Biophysics, Mount Sinai School of Medicine, New York, New York 10029, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (INTERFERON REGULATORY FACTOR 1)
A, B
113Mus musculusMutation(s): 0 
Gene Names: Irf1
Find proteins for P15314 (Mus musculus)
Go to UniProtKB:  P15314
Entity ID: 1
MoleculeChainsLengthOrganism
DNA (26-MER)C,D26synthetic construct
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.242 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 84.800α = 90.00
b = 84.800β = 90.00
c = 203.700γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
PHASESphasing
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-02-25
    Type: Initial release
  • Version 1.1: 2008-05-22
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-02-15
    Type: Source and taxonomy, Structure summary