2XTD

Structure of the TBL1 tetramerisation domain

• PDB DOI:  https://doi.org/10.2210/pdb2XTD/pdb

• Classification: TRANSCRIPTION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2010-10-06 Released: 2011-01-19 
• Deposition Author(s): Oberoi, J., Fairall, L., Watson, P.J., Greenwood, J.A., Schwabe, J.W.R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 0.315 
• R-Value Work: 0.278 
• R-Value Observed: 0.280 

Literature

Structural Basis for the Assembly of the Smrt/Ncor Core Transcriptional Repression Machinery.

Oberoi, J., Fairall, L., Watson, P.J., Yang, J.C., Czimmerer, Z., Kampmann, T., Goult, B.T., Greenwood, J.A., Gooch, J.T., Kallenberger, B.C., Nagy, L., Neuhaus, D., Schwabe, J.W.R.

(2011) Nat Struct Mol Biol 18: 177

• PubMed: 21240272 
• DOI: https://doi.org/10.1038/nsmb.1983
• Primary Citation of Related Structures:  
  2L5G, 2XTC, 2XTD, 2XTE


• PubMed Abstract: 
  

Eukaryotic transcriptional repressors function by recruiting large coregulatory complexes that target histone deacetylase enzymes to gene promoters and enhancers. Transcriptional repression complexes, assembled by the corepressor NCoR and its homolog SMRT, are crucial in many processes, including development and metabolic physiology. The core repression complex involves the recruitment of three proteins, HDAC3, GPS2 and TBL1, to a highly conserved repression domain within SMRT and NCoR. We have used structural and functional approaches to gain insight into the architecture and biological role of this complex. We report the crystal structure of the tetrameric oligomerization domain of TBL1, which interacts with both SMRT and GPS2, and the NMR structure of the interface complex between GPS2 and SMRT. These structures, together with computational docking, mutagenesis and functional assays, reveal the assembly mechanism and stoichiometry of the corepressor complex.

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Organizational Affiliation: 

Henry Wellcome Laboratories of Structural Biology, Department of Biochemistry, University of Leicester, Leicester, UK.

Biological Assembly 1  

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 15.57 kDa 
• Atom Count: 1,014 
• Modelled Residue Count: 132 
• Deposited Residue Count: 142 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
TBL1 F-BOX-LIKE/WD REPEAT-CONTAINING PROTEIN TBL1X	A, B	71	Homo sapiens	Mutation(s): 0  Gene Names: TBL1X, TBL1
UniProt & NIH Common Fund Data Resources
Find proteins for O60907 (Homo sapiens) Explore O60907  Go to UniProtKB:  O60907
PHAROS:  O60907

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 0.315 
• R-Value Work: 0.278 
• R-Value Observed: 0.280 
• Space Group: P 3₂ 1 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 47.886	α = 90
b = 47.886	β = 90
c = 153.811	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2011-01-19 
Deposition Author(s): Oberoi, J., Fairall, L., Watson, P.J., Greenwood, J.A., Schwabe, J.W.R.

Revision History  

• Version 1.0: 2011-01-19
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance