3CWG

Unphosphorylated mouse STAT3 core fragment

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.05 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.250 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history. 

Literature

Crystal structure of unphosphorylated STAT3 core fragment.

Ren, Z., Mao, X., Mertens, C., Krishnaraj, R., Qin, J., Mandal, P.K., Romanowski, M.J., McMurray, J.S., Chen, X.

(2008) Biochem.Biophys.Res.Commun. 374: 1-5

  • DOI: 10.1016/j.bbrc.2008.04.049

  • PubMed Abstract: 

    • Signal transducers and activators of transcription (STATs) are latent cytoplasmic transcriptional factors that play an important role in cytokine and growth factor signaling. Here we report a 3.05 A-resolution crystal structure of an unphosphorylated ...

    Signal transducers and activators of transcription (STATs) are latent cytoplasmic transcriptional factors that play an important role in cytokine and growth factor signaling. Here we report a 3.05 A-resolution crystal structure of an unphosphorylated STAT3 core fragment. The overall monomeric structure is very similar to that of the phosphorylated STAT3 core fragment. However, the dimer interface observed in the unphosphorylated STAT1 core fragment structure is absent in the STAT3 structure. Solution studies further demonstrate that the core fragment of STAT3 is primarily monomeric. Mutations corresponding to those in STAT1, which lead to disruption of the core fragment interface and prolonged tyrosine phosphorylation, show little or no effect on the tyrosine phosphorylation kinetics of STAT3. These results highlight the structural and biochemical differences between STAT3 and STAT1, and suggest different regulation mechanisms of these two proteins.

    Organizational Affiliation: 

    Department of Biochemistry and Molecular Biology, University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Unit 1000, Houston, TX 77030, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Signal transducer and activator of transcription 3
A, B
562Mus musculusMutation(s): 0 
Gene Names: Stat3 (Aprf)
Find proteins for P42227 (Mus musculus)
Go to UniProtKB:  P42227
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.05 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.250 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 254.779α = 90.00
b = 254.779β = 90.00
c = 123.781γ = 120.00
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data scaling
PHASERphasing
HKL-2000data reduction
HKL-2000data collection

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-07-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance