4ZIA

Crystal Structure of STAT3 N-terminal domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.236 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Impact of the N-Terminal Domain of STAT3 in STAT3-Dependent Transcriptional Activity.

Hu, T.Yeh, J.E.Pinello, L.Jacob, J.Chakravarthy, S.Yuan, G.C.Chopra, R.Frank, D.A.

(2015) Mol Cell Biol 35: 3284-3300

  • DOI: 10.1128/MCB.00060-15
  • Primary Citation of Related Structures:  
    4ZIA

  • PubMed Abstract: 
  • The transcription factor STAT3 is constitutively active in many cancers, where it mediates important biological effects, including cell proliferation, differentiation, survival, and angiogenesis. The N-terminal domain (NTD) of STAT3 performs multiple functions, such as cooperative DNA binding, nuclear translocation, and protein-protein interactions ...

    The transcription factor STAT3 is constitutively active in many cancers, where it mediates important biological effects, including cell proliferation, differentiation, survival, and angiogenesis. The N-terminal domain (NTD) of STAT3 performs multiple functions, such as cooperative DNA binding, nuclear translocation, and protein-protein interactions. However, it is unclear which subsets of STAT3 target genes depend on the NTD for transcriptional regulation. To identify such genes, we compared gene expression in STAT3-null mouse embryonic fibroblasts (MEFs) stably expressing wild-type STAT3 or STAT3 from which NTD was deleted. NTD deletion reduced the cytokine-induced expression of specific STAT3 target genes by decreasing STAT3 binding to their regulatory regions. To better understand the potential mechanisms of this effect, we determined the crystal structure of the STAT3 NTD and identified a dimer interface responsible for cooperative DNA binding in vitro. We also observed an Ni(2+)-mediated oligomer with an as yet unknown biological function. Mutations on both dimer and Ni(2+)-mediated interfaces affected the cytokine induction of STAT3 target genes. These studies shed light on the role of the NTD in transcriptional regulation by STAT3 and provide a structural template with which to design STAT3 NTD inhibitors with potential therapeutic value.


    Organizational Affiliation

    Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA Biophysical Collaborative Access Team/Illinois Institute of Technology, Sector 18ID (Advanced Photon Source, Argonne National Laboratory), Lemont, Illinois, USA Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA Department of Biostatistics, Harvard School of Public Health, Boston, Massachusetts, USA Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA rajiv.chopra@novartis.com david_frank@dfci.harvard.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Signal transducer and activator of transcription 3A, B, C, D, E129Mus musculusMutation(s): 0 
Gene Names: Stat3Aprf
UniProt
Find proteins for P42227 (Mus musculus)
Explore P42227 
Go to UniProtKB:  P42227
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP42227
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NI
Query on NI

Download Ideal Coordinates CCD File 
F [auth B]NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N
 Ligand Interaction
FMT
Query on FMT

Download Ideal Coordinates CCD File 
G [auth D]FORMIC ACID
C H2 O2
BDAGIHXWWSANSR-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
H [auth E]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.236 
  • Space Group: P 41 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 109.012α = 90
b = 109.012β = 90
c = 154.3γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
CNSrefinement
PDB_EXTRACTdata extraction
PHASERphasing
XDSdata reduction

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

  • Deposited Date: 2015-04-28 
  • Released Date: 2015-07-29 
  • Deposition Author(s): Hu, T., Chopra, R.

Revision History  (Full details and data files)

  • Version 1.0: 2015-07-29
    Type: Initial release