Structure of Unphosphorylated STAT1

Experimental Data Snapshot

  • Resolution: 3.00 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.240 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Structural bases of unphosphorylated STAT1 association and receptor binding.

Mao, X.Ren, Z.Parker, G.N.Sondermann, H.Pastorello, M.A.Wang, W.McMurray, J.S.Demeler, B.Darnell, J.E.Chen, X.

(2005) Mol Cell 17: 761-771

  • DOI: https://doi.org/10.1016/j.molcel.2005.02.021
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The crystal structure has been determined at 3.0 A resolution for an unphosphorylated STAT1 (1-683) complexed with a phosphopeptide derived from the alpha chain of interferon gamma (IFNgamma) receptor. Two dimer interfaces are seen, one between the N domains (NDs) (amino acid residues 1-123) and the other between the core fragments (CFs) (residues 132-683). Analyses of the wild-type (wt) and mutant STAT1 proteins by static light scattering, analytical ultracentrifugation, and coimmunoprecipitation suggest that STAT1 is predominantly dimeric prior to activation, and the dimer is mediated by the ND interactions. The connecting region between the ND and the CF is flexible and allows two interconvertable orientations of the CFs, termed "antiparallel" or "parallel," as determined by SH2 domain orientations. Functional implications of these dimer conformations are discussed. Also revealed in this structure is the detailed interaction between STAT1 SH2 domain and its docking site on IFNgamma receptor.

  • Organizational Affiliation

    Department of Biochemistry and Molecular Biology, M.D. Anderson Cancer Center , The University of Texas, Houston, Texas 77030, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Signal transducer and activator of transcription 1-alpha/beta
A, B
683Homo sapiensMutation(s): 0 
Gene Names: STAT1
UniProt & NIH Common Fund Data Resources
Find proteins for P42224 (Homo sapiens)
Explore P42224 
Go to UniProtKB:  P42224
GTEx:  ENSG00000115415 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP42224
Sequence Annotations
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
5-residue peptide
C, D
5N/AMutation(s): 0 
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on PTR
C, D
Experimental Data & Validation

Experimental Data

  • Resolution: 3.00 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.240 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.553α = 90
b = 102.553β = 90
c = 646.481γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-03-22
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance