1R2B

Crystal structure of the BCL6 BTB domain complexed with a SMRT co-repressor peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.227 

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
  • Structures With Same Primary Citation

  • 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, B
127Homo sapiensMutation(s): 3 
Gene Names: BCL6BCL5LAZ3ZBTB27ZNF51
Find proteins for P41182 (Homo sapiens)
Go to UniProtKB:  P41182
NIH Common Fund Data Resources
PHAROS  P41182
Protein Feature View
  • Reference Sequence
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Nuclear receptor co-repressor 2
C, D
19Homo sapiensMutation(s): 0 
Gene Names: NCOR2 OR CTG26NCOR2CTG26
Find proteins for Q9Y618 (Homo sapiens)
Go to UniProtKB:  Q9Y618
NIH Common Fund Data Resources
PHAROS  Q9Y618
Protein Feature View
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.227 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.228α = 90
b = 38.543β = 92.92
c = 76.659γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing

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: Version format compliance