3SL9

X-ray structure of Beta catenin in complex with Bcl9

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


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

Literature

An intrinsically labile alpha-helix abutting the BCL9-binding site of beta-catenin is required for its inhibition by carnosic acid.

de la Roche, M., Rutherford, T.J., Gupta, D., Veprintsev, D.B., Saxty, B., Freund, S.M., Bienz, M.

(2012) Nat Commun 3: 680-680

  • DOI: 10.1038/ncomms1680
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • Wnt/β-catenin signalling controls development and tissue homeostasis. Moreover, activated β-catenin can be oncogenic and, notably, drives colorectal cancer. Inhibiting oncogenic β-catenin has proven a formidable challenge. Here we design a screen for ...

    Wnt/β-catenin signalling controls development and tissue homeostasis. Moreover, activated β-catenin can be oncogenic and, notably, drives colorectal cancer. Inhibiting oncogenic β-catenin has proven a formidable challenge. Here we design a screen for small-molecule inhibitors of β-catenin's binding to its cofactor BCL9, and discover five related natural compounds, including carnosic acid from rosemary, which attenuates transcriptional β-catenin outputs in colorectal cancer cells. Evidence from NMR and analytical ultracentrifugation demonstrates that the carnosic acid response requires an intrinsically labile α-helix (H1) amino-terminally abutting the BCL9-binding site in β-catenin. Similarly, in colorectal cancer cells with hyperactive β-catenin signalling, carnosic acid targets predominantly the transcriptionally active ('oncogenic') form of β-catenin for proteasomal degradation in an H1-dependent manner. Hence, H1 is an 'Achilles' Heel' of β-catenin, which can be exploited for destabilization of oncogenic β-catenin by small molecules, providing proof-of-principle for a new strategy for developing direct inhibitors of oncogenic β-catenin.

    Organizational Affiliation: 

    MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Catenin beta-1
A, B, E, G
167Homo sapiensMutation(s): 0 
Gene Names: CTNNB1 (CTNNB)
Find proteins for P35222 (Homo sapiens)
Go to Gene View: CTNNB1
Go to UniProtKB:  P35222
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
B-cell CLL/lymphoma 9 protein
C, D, F, H
55Homo sapiensMutation(s): 0 
Gene Names: BCL9
Find proteins for O00512 (Homo sapiens)
Go to Gene View: BCL9
Go to UniProtKB:  O00512
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL
Download SDF File 
Download CCD File 
B, E, F, G
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO
Download SDF File 
Download CCD File 
A, B, C, E
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
IMD
Query on IMD
Download SDF File 
Download CCD File 
A, B, E, G
IMIDAZOLE
C3 H5 N2
RAXXELZNTBOGNW-UHFFFAOYSA-O
 Ligand Interaction
PEG
Query on PEG
Download SDF File 
Download CCD File 
A, B, C, E
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.194 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 160.890α = 90.00
b = 80.700β = 102.00
c = 87.940γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
MxCuBEdata collection
REFMACrefinement
PHASERphasing
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 2011-06-24 
  • Released Date: 2012-02-29 
  • Deposition Author(s): Gupta, D., Bienz, M.

Revision History 

  • Version 1.0: 2012-02-29
    Type: Initial release
  • Version 1.1: 2012-05-30
    Type: Database references