3OUX

Structure of beta-catenin with phosphorylated Lef-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Biochemical and structural characterization of beta-catenin interactions with nonphosphorylated and CK2-phosphorylated Lef-1.

Sun, J.Weis, W.I.

(2011) J.Mol.Biol. 405: 519-530

  • DOI: 10.1016/j.jmb.2010.11.010
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • In the Wnt/β-catenin signaling pathway, β-catenin activates target genes through its interactions with the T-cell factor/lymphoid enhancer-binding factor (TCF/Lef) family of transcription factors. The crystal structures of complexes between the β-cat ...

    In the Wnt/β-catenin signaling pathway, β-catenin activates target genes through its interactions with the T-cell factor/lymphoid enhancer-binding factor (TCF/Lef) family of transcription factors. The crystal structures of complexes between the β-catenin armadillo domain and the Lef-1 N-terminal domain show that the overall conformation and many of the interactions are similar to other published structures of TCFs bound to β-catenin. However, a second salt bridge in other TCF-β-catenin structures is absent in the structure of β-catenin-Lef-1 complex, indicating that this feature is not obligatory for β-catenin binding. Casein kinase II (CK2) has been shown to act as a positive regulator of Wnt signaling, and Lef-1 is a substrate of CK2. In vitro phosphorylation of purified Lef-1 was used to examine the effect of CK2 on the interaction of Lef-1 with β-catenin. Mass spectrometry data show that CK2 phosphorylation of Lef-1 N-terminal domain results in a single phosphorylation site at Ser40. Isothermal titration calorimetry revealed that β-catenin binds to nonphosphorylated or CK2-phosphorylated Lef-1 with the same affinity, which is consistent with the absence of phospho-Ser40 interactions in the crystal structure of phosphorylated Lef-1 N-terminal domain bound to β-catenin. These data indicate that the effect of CK2 on the Wnt/β-catenin pathway does not appear to be at the level of the Lef-1-β-catenin interaction.


    Organizational Affiliation

    Department of Structural Biology, Stanford University School of Medicine,Stanford, CA 94305-5126, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Catenin beta-1
A
540Mus musculusMutation(s): 0 
Gene Names: Ctnnb1 (Catnb)
Find proteins for Q02248 (Mus musculus)
Go to UniProtKB:  Q02248
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Lymphoid enhancer-binding factor 1
B
67Mus musculusMutation(s): 0 
Gene Names: Lef1 (Lef-1)
Find proteins for P27782 (Mus musculus)
Go to UniProtKB:  P27782
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.199 
  • Space Group: I 4 2 2
Unit Cell:
Length (Å)Angle (°)
a = 115.560α = 90.00
b = 115.560β = 90.00
c = 195.930γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
PHENIXrefinement
PHASERphasing
Blu-Icedata collection
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2010-09-15 
  • Released Date: 2010-11-24 
  • Deposition Author(s): Weis, W.I., Sun, J.

Revision History 

  • Version 1.0: 2010-11-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2015-12-02
    Type: Database references
  • Version 1.3: 2015-12-09
    Type: Other