2GRC

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.242 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

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: 10.1002/cbic.200600562

  • 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 a ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Probable global transcription activator SNF2L4
A
129Homo sapiensMutation(s): 0 
Gene Names: SMARCA4 (BAF190A, BRG1, SNF2B, SNF2L4)
EC: 3.6.4.-
Find proteins for P51532 (Homo sapiens)
Go to Gene View: SMARCA4
Go to UniProtKB:  P51532
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.242 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 29.860α = 90.00
b = 30.330β = 90.28
c = 66.820γ = 90.00
Software Package:
Software NamePurpose
CCP4data scaling
REFMACrefinement
MAR345data collection
SHELXSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-05-08
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-18
    Type: Refinement description