4E68

Unphosphorylated STAT3B core protein binding to dsDNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.58 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.228 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Observation of unphosphorylated STAT3 core protein binding to target dsDNA by PEMSA and X-ray crystallography.

Nkansah, E.Shah, R.Collie, G.W.Parkinson, G.N.Palmer, J.Rahman, K.M.Bui, T.T.Drake, A.F.Husby, J.Neidle, S.Zinzalla, G.Thurston, D.E.Wilderspin, A.F.

(2013) FEBS Lett 587: 833-839

  • DOI: 10.1016/j.febslet.2013.01.065
  • Primary Citation of Related Structures:  
    4E68

  • PubMed Abstract: 
  • The STAT3 transcription factor plays a central role in a wide range of cancer types where it is over-expressed. Previously, phosphorylation of this protein was thought to be a prerequisite for direct binding to DNA. However, we have now shown complete bi ...

    The STAT3 transcription factor plays a central role in a wide range of cancer types where it is over-expressed. Previously, phosphorylation of this protein was thought to be a prerequisite for direct binding to DNA. However, we have now shown complete binding of a purified unphosphorylated STAT3 (uSTAT3) core directly to M67 DNA, the high affinity STAT3 target DNA sequence, by a protein electrophoretic mobility shift assay (PEMSA). Binding to M67 DNA was inhibited by addition of increasing concentrations of a phosphotyrosyl peptide. X-ray crystallography demonstrates one mode of binding that is similar to that known for the STAT3 core phosphorylated at Y705.


    Organizational Affiliation

    Department of Pharmaceutical and Biological Chemistry, UCL School of Pharmacy, London, United Kingdom.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Signal transducer and activator of transcription 3 A596Mus musculusMutation(s): 0 
Gene Names: AprfStat3STAT3B
Find proteins for P42227 (Mus musculus)
Explore P42227 
Go to UniProtKB:  P42227
Protein Feature View
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  • Reference Sequence
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 1
    MoleculeChainsLengthOrganismImage
    DNA (5'-D(*TP*GP*CP*AP*TP*TP*TP*CP*CP*CP*GP*TP*AP*AP*AP*TP*CP*T)-3')B18synthetic construct
    Experimental Data & Validation

    Experimental Data

    • Method: X-RAY DIFFRACTION
    • Resolution: 2.58 Å
    • R-Value Free: 0.273 
    • R-Value Work: 0.225 
    • R-Value Observed: 0.228 
    • Space Group: I 41
    Unit Cell:
    Length ( Å )Angle ( ˚ )
    a = 174.14α = 90
    b = 174.14β = 90
    c = 79.29γ = 90
    Software Package:
    Software NamePurpose
    DNAdata collection
    PHASERphasing
    REFMACrefinement
    xia2data reduction
    SCALAdata scaling

    Structure Validation

    View Full Validation Report



    Entry History 

    Deposition Data

    Revision History 

    • Version 1.0: 2013-03-06
      Type: Initial release
    • Version 1.1: 2013-03-13
      Changes: Database references
    • Version 1.2: 2013-04-10
      Changes: Database references