3DSH

Crystal structure of dimeric interferon regulatory factor 5 (IRF-5) transactivation domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Insights into interferon regulatory factor activation from the crystal structure of dimeric IRF5.

Chen, W.Lam, S.S.Srinath, H.Jiang, Z.Correia, J.J.Schiffer, C.A.Fitzgerald, K.A.Lin, K.Royer, W.E.

(2008) Nat.Struct.Mol.Biol. 15: 1213-1220

  • DOI: 10.1038/nsmb.1496

  • PubMed Abstract: 
  • Interferon regulatory factors (IRFs) are essential in the innate immune response and other physiological processes. Activation of these proteins in the cytoplasm is triggered by phosphorylation of serine and threonine residues in a C-terminal autoinh ...

    Interferon regulatory factors (IRFs) are essential in the innate immune response and other physiological processes. Activation of these proteins in the cytoplasm is triggered by phosphorylation of serine and threonine residues in a C-terminal autoinhibitory region, which stimulates dimerization, transport into the nucleus, assembly with the coactivator CBP/p300 and initiation of transcription. The crystal structure of the transactivation domain of pseudophosphorylated human IRF5 strikingly reveals a dimer in which the bulk of intersubunit interactions involve a highly extended C-terminal region. The corresponding region has previously been shown to block CBP/p300 binding to unphosphorylated IRF3. Mutation of key interface residues supports the observed dimer as the physiologically activated state of IRF5 and IRF3. Thus, phosphorylation is likely to activate IRF5 and other family members by triggering conformational rearrangements that switch the C-terminal segment from an autoinihibitory to a dimerization role.


    Organizational Affiliation

    Department of Biochemistry and Molecular Pharmacology, 364 Plantation Street, Worcester, Massachusetts 01605, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Interferon regulatory factor 5
A
246Homo sapiensMutation(s): 1 
Gene Names: IRF5
Find proteins for Q13568 (Homo sapiens)
Go to Gene View: IRF5
Go to UniProtKB:  Q13568
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.204 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 66.162α = 90.00
b = 66.162β = 90.00
c = 156.254γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data reduction
SOLVEphasing
REFMACrefinement
HKL-2000data scaling
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-10-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Refinement description, Version format compliance