1.5 A structure of bromodomain from human BRG1 protein, a central ATPase of SWI/SNF remodeling complex

Experimental Data Snapshot

  • Resolution: 1.50 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.243 

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Structural ramification for acetyl-lysine recognition by the bromodomain of human BRG1 protein, a central ATPase of the SWI/SNF remodeling complex.

Singh, M.Popowicz, G.M.Krajewski, M.Holak, T.A.

(2007) Chembiochem 8: 1308-1316

  • DOI: https://doi.org/10.1002/cbic.200600562
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Bromodomains represent an extensive family of evolutionarily conserved domains that are found in many chromatin-associated proteins such as histone acetyltransferases (HAT) and subunits of ATP-dependent chromatin-remodeling complexes. These domains are associated with acetylated lysine residues that bind both in vivo and in vitro; for example, they bind to the N-acetylated lysines of the histone tail of nucleosomes. In this report, we determined the structure of the bromodomain from human brahma-related gene 1 (BRG1) protein, a subunit of an ATP-dependent switching/sucrose nonfermenting (SWI/SNF) remodeling complex, and have also characterized its in vitro interaction with N-acetylated lysine peptides from histones. In addition to a typical all-alpha-helical fold that was observed in the bromodomains, we observed for the first time a small beta-sheet in the ZA loop region of the BRG1 protein. The BRG1 bromodomain exhibited binding, albeit weak, to acetylated peptides that were derived from histones H3 and H4. We have compared the acetyl-lysine binding sites of BRG1 bromodomain with the yGCN5 (general control of amino acid biosynthesis). By modeling the acetylated-lysine peptide into the BRG1 bromodomain structure, we were able to explain the weak binding of acetylated-lysine peptides to this bromodomain.

  • Organizational Affiliation

    Max-Planck-Institute for Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Probable global transcription activator SNF2L4129Homo sapiensMutation(s): 0 
EC: 3.6.1
UniProt & NIH Common Fund Data Resources
Find proteins for P51532 (Homo sapiens)
Explore P51532 
Go to UniProtKB:  P51532
GTEx:  ENSG00000127616 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP51532
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.50 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.243 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 29.86α = 90
b = 30.33β = 90.28
c = 66.82γ = 90
Software Package:
Software NamePurpose
MAR345data collection
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-05-08
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description
  • Version 1.4: 2024-02-14
    Changes: Data collection, Database references