1R29

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.173 
  • R-Value Work: 0.128 
  • R-Value Observed: 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

  • DOI: 10.1016/s1097-2765(03)00454-4
  • Primary Citation of Related Structures:  
    1R2B, 1R28, 1R29

  • 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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
B-cell lymphoma 6 proteinA127Homo sapiensMutation(s): 3 
Gene Names: BCL6BCL5LAZ3ZBTB27ZNF51
Find proteins for P41182 (Homo sapiens)
Explore P41182 
Go to UniProtKB:  P41182
NIH Common Fund Data Resources
PHAROS  P41182
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.173 
  • R-Value Work: 0.128 
  • R-Value Observed: 0.128 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 30.606α = 90
b = 71.849β = 105.91
c = 55.414γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing
DMmodel building
shelxl-97refinement
DMphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

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