4OM2

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.00 Å
  • R-Value Free: 0.347 
  • R-Value Work: 0.287 
  • R-Value Observed: 0.294 

wwPDB Validation   3D Report Full Report


This is version 1.2 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: https://doi.org/10.1002/embj.201387188
  • Primary Citation of Related Structures:  
    4OM2, 4OM3

  • 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 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Transducin-like enhancer protein 1
A, B, C, D
163Homo sapiensMutation(s): 0 
Gene Names: TLETLE1
UniProt & NIH Common Fund Data Resources
Find proteins for Q04724 (Homo sapiens)
Explore Q04724 
Go to UniProtKB:  Q04724
PHAROS:  Q04724
GTEx:  ENSG00000196781 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ04724
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.00 Å
  • R-Value Free: 0.347 
  • R-Value Work: 0.287 
  • R-Value Observed: 0.294 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.586α = 90
b = 94.908β = 90
c = 130.207γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
Blu-Icedata collection
XDSdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-04-09
    Type: Initial release
  • Version 1.1: 2014-04-16
    Changes: Database references
  • Version 1.2: 2024-10-09
    Changes: Data collection, Database references, Structure summary