1R29

Crystal Structure of the B-Cell Lymphoma 6 (BCL6) BTB Domain to 1.3 Angstrom


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.173 
  • R-Value Work: 0.128 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Mechanism of SMRT corepressor recruitment by the BCL6 BTB domain.

Ahmad, K.F.Melnick, A.Lax, S.Bouchard, D.Liu, J.Kiang, C.L.Mayer, S.Takahashi, S.Licht, J.D.Prive, G.G.

(2003) Mol.Cell 12: 1551-1564

  • Primary Citation of Related Structures:  1R28, 1R2B

  • PubMed Abstract: 
  • BCL6 encodes a transcription factor that represses genes necessary for the terminal differentiation of lymphocytes within germinal centers, and the misregulated expression of this factor is strongly implicated in several types of B cell lymphoma. The ...

    BCL6 encodes a transcription factor that represses genes necessary for the terminal differentiation of lymphocytes within germinal centers, and the misregulated expression of this factor is strongly implicated in several types of B cell lymphoma. The homodimeric BTB domain of BCL6 (also known as the POZ domain) is required for the repression activity of the protein and interacts directly with the SMRT and N-CoR corepressors that are found within large multiprotein histone deacetylase-containing complexes. We have identified a 17 residue fragment from SMRT that binds to the BCL6 BTB domain, and determined the crystal structure of the complex to 2.2 A. Two SMRT fragments bind symmetrically to the BCL6 BTB homodimer and, in combination with biochemical and in vivo data, the structure provides insight into the basis of transcriptional repression by this critical B cell lymphoma protein.


    Organizational Affiliation

    Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5G 2M9, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
B-cell lymphoma 6 protein
A
127Homo sapiensGene Names: BCL6 (BCL5, LAZ3, ZBTB27, ZNF51)
Find proteins for P41182 (Homo sapiens)
Go to Gene View: BCL6
Go to UniProtKB:  P41182
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.173 
  • R-Value Work: 0.128 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 30.606α = 90.00
b = 71.849β = 105.91
c = 55.414γ = 90.00
Software Package:
Software NamePurpose
shelxl-97refinement
DENZOdata reduction
DMphasing
SCALEPACKdata scaling
SOLVEphasing
DMmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-12-23
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance