2WP2

Structure of Brdt bromodomain BD1 bound to a diacetylated histone H4 peptide.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.37 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.217 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Cooperative Binding of Two Acetylation Marks on a Histone Tail by a Single Bromodomain.

Moriniere, J.Rousseaux, S.Steuerwald, U.Soler-Lopez, M.Curtet, S.Vitte, A.-L.Govin, J.Gaucher, J.Sadoul, K.Hart, D.J.Krijgsveld, J.Khochbin, S.Mueller, C.W.Petosa, C.

(2009) Nature 461: 664

  • DOI: 10.1038/nature08397
  • Primary Citation of Related Structures:  2WP1

  • PubMed Abstract: 
  • A key step in many chromatin-related processes is the recognition of histone post-translational modifications by effector modules such as bromodomains and chromo-like domains of the Royal family. Whereas effector-mediated recognition of single post-t ...

    A key step in many chromatin-related processes is the recognition of histone post-translational modifications by effector modules such as bromodomains and chromo-like domains of the Royal family. Whereas effector-mediated recognition of single post-translational modifications is well characterized, how the cell achieves combinatorial readout of histones bearing multiple modifications is poorly understood. One mechanism involves multivalent binding by linked effector modules. For example, the tandem bromodomains of human TATA-binding protein-associated factor-1 (TAF1) bind better to a diacetylated histone H4 tail than to monoacetylated tails, a cooperative effect attributed to each bromodomain engaging one acetyl-lysine mark. Here we report a distinct mechanism of combinatorial readout for the mouse TAF1 homologue Brdt, a testis-specific member of the BET protein family. Brdt associates with hyperacetylated histone H4 (ref. 7) and is implicated in the marked chromatin remodelling that follows histone hyperacetylation during spermiogenesis, the stage of spermatogenesis in which post-meiotic germ cells mature into fully differentiated sperm. Notably, we find that a single bromodomain (BD1) of Brdt is responsible for selectively recognizing histone H4 tails bearing two or more acetylation marks. The crystal structure of BD1 bound to a diacetylated H4 tail shows how two acetyl-lysine residues cooperate to interact with one binding pocket. Structure-based mutagenesis that reduces the selectivity of BD1 towards diacetylated tails destabilizes the association of Brdt with acetylated chromatin in vivo. Structural analysis suggests that other chromatin-associated proteins may be capable of a similar mode of ligand recognition, including yeast Bdf1, human TAF1 and human CBP/p300 (also known as CREBBP and EP300, respectively). Our findings describe a new mechanism for the combinatorial readout of histone modifications in which a single effector module engages two marks on a histone tail as a composite binding epitope.


    Organizational Affiliation

    European Molecular Biology Laboratory, Grenoble Outstation, 6 rue Jules Horowitz, BP 181, 38042 Grenoble Cedex 9, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BROMODOMAIN TESTIS-SPECIFIC PROTEIN
A, B
120Mus musculusGene Names: Brdt (Fsrg3)
Find proteins for Q91Y44 (Mus musculus)
Go to UniProtKB:  Q91Y44
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
HISTONE H4
P, Q
20Mus musculusGene Names: Hist1h4a, Hist1h4b, Hist1h4c, Hist1h4d, Hist1h4f, Hist1h4h, Hist1h4i, Hist1h4j, Hist1h4k, Hist1h4m, Hist2h4a, Hist4h4 (H4-53, H4-12, Hist2h4)
Find proteins for P62806 (Mus musculus)
Go to UniProtKB:  P62806
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
ALY
Query on ALY
P, Q
L-PEPTIDE LINKINGC8 H16 N2 O3LYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.37 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.217 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 49.293α = 90.00
b = 61.224β = 90.00
c = 97.910γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
XSCALEdata scaling
XDSdata reduction
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-09-22
    Type: Initial release
  • Version 1.1: 2012-03-28
    Type: Database references, Derived calculations, Other, Refinement description, Structure summary, Version format compliance