4E68

Unphosphorylated STAT3B core protein binding to dsDNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.585 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.225 

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

  • 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 complet ...

    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: Sequence  |  Structure


Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Signal transducer and activator of transcription 3
A
596Mus musculusMutation(s): 0 
Gene Names: Stat3 (Aprf)
Find proteins for P42227 (Mus musculus)
Go to UniProtKB:  P42227
Entity ID: 1
MoleculeChainsLengthOrganism
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: 2.585 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.225 
  • Space Group: I 41
Unit Cell:
Length (Å)Angle (°)
a = 174.140α = 90.00
b = 174.140β = 90.00
c = 79.290γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
xia2data reduction
SCALAdata scaling
DNAdata collection
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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