3BIM

Crystal structure of the BCL6 BTB domain dimer in complex with the BCOR BBD corepressor peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of a BCOR corepressor peptide in complex with the BCL6 BTB domain dimer.

Ghetu, A.F.Corcoran, C.M.Cerchietti, L.Bardwell, V.J.Melnick, A.Prive, G.G.

(2008) Mol.Cell 29: 384-391

  • DOI: 10.1016/j.molcel.2007.12.026

  • PubMed Abstract: 
  • The transcriptional corepressors BCOR, SMRT, and NCoR are known to bind competitively to the BCL6 BTB domain despite the fact that BCOR has no detectable sequence similarity to the other two corepressors. We have identified a 17 residue motif from BC ...

    The transcriptional corepressors BCOR, SMRT, and NCoR are known to bind competitively to the BCL6 BTB domain despite the fact that BCOR has no detectable sequence similarity to the other two corepressors. We have identified a 17 residue motif from BCOR that binds directly to the BCL6 BTB domain and determined the crystal structure of the complex to a resolution of 2.6 A. Remarkably, the BCOR BCL6 binding domain (BCOR(BBD)) peptide binds in the same BCL6 binding site as the SMRT(BBD) peptide despite the lack of any significant sequence similarity between the two peptides. Mutations of critical BCOR(BBD) residues cause the disruption of the BCL6 corepression activities of BCOR, and a BCOR(BBD) peptide blocks BCL6-mediated transcriptional repression and kills lymphoma cells.


    Organizational Affiliation

    Division of Cancer Genomics and Proteomics, Ontario Cancer Institute, 101 College Street, Toronto, ON M5G 1L7, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
B-cell lymphoma 6 protein
A, B, C, D, E, F, G, H
127Homo sapiensMutation(s): 3 
Gene Names: BCL6 (BCL5, LAZ3, ZBTB27, ZNF51)
Find proteins for P41182 (Homo sapiens)
Go to Gene View: BCL6
Go to UniProtKB:  P41182
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
BCL-6 corepressor
I, J, K, L, M, N, O, P
19Homo sapiensMutation(s): 0 
Gene Names: BCOR (KIAA1575)
Find proteins for Q6W2J9 (Homo sapiens)
Go to Gene View: BCOR
Go to UniProtKB:  Q6W2J9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.219 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 150.550α = 90.00
b = 150.550β = 90.00
c = 312.250γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
PDB_EXTRACTdata extraction
HKL-2000data collection
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-01-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-10-25
    Type: Refinement description