4OM2

Crystal structure of TLE1 N-terminal Q-domain residues 1-156


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4 Å
  • R-Value Free: 0.347 
  • R-Value Work: 0.287 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Molecular functions of the TLE tetramerization domain in Wnt target gene repression.

Chodaparambil, J.V.Pate, K.T.Hepler, M.R.Tsai, B.P.Muthurajan, U.M.Luger, K.Waterman, M.L.Weis, W.I.

(2014) Embo J. 33: 719-731

  • DOI: 10.1002/embj.201387188
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Wnt signaling activates target genes by promoting association of the co-activator β-catenin with TCF/LEF transcription factors. In the absence of β-catenin, target genes are silenced by TCF-mediated recruitment of TLE/Groucho proteins, but the molecu ...

    Wnt signaling activates target genes by promoting association of the co-activator β-catenin with TCF/LEF transcription factors. In the absence of β-catenin, target genes are silenced by TCF-mediated recruitment of TLE/Groucho proteins, but the molecular basis for TLE/TCF-dependent repression is unclear. We describe the unusual three-dimensional structure of the N-terminal Q domain of TLE1 that mediates tetramerization and binds to TCFs. We find that differences in repression potential of TCF/LEFs correlates with their affinities for TLE-Q, rather than direct competition between β-catenin and TLE for TCFs as part of an activation-repression switch. Structure-based mutation of the TLE tetramer interface shows that dimers cannot mediate repression, even though they bind to TCFs with the same affinity as tetramers. Furthermore, the TLE Q tetramer, not the dimer, binds to chromatin, specifically to K20 methylated histone H4 tails, suggesting that the TCF/TLE tetramer complex promotes structural transitions of chromatin to mediate repression.


    Organizational Affiliation

    Departments of Structural Biology and Molecular & Cellular Physiology, Stanford University School of Medicine, Stanford, CA, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Transducin-like enhancer protein 1
A, B, C, D
163Homo sapiensMutation(s): 0 
Gene Names: TLE1
Find proteins for Q04724 (Homo sapiens)
Go to Gene View: TLE1
Go to UniProtKB:  Q04724
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4 Å
  • R-Value Free: 0.347 
  • R-Value Work: 0.287 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 49.586α = 90.00
b = 94.908β = 90.00
c = 130.207γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
XDSdata reduction
SCALAdata scaling
Blu-Icedata collection
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-04-09
    Type: Initial release
  • Version 1.1: 2014-04-16
    Type: Database references