4OUF

Crystal Structure of CBP bromodomain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.149 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Binding of the histone chaperone ASF1 to the CBP bromodomain promotes histone acetylation.

Das, C.Roy, S.Namjoshi, S.Malarkey, C.S.Jones, D.N.Kutateladze, T.G.Churchill, M.E.Tyler, J.K.

(2014) Proc.Natl.Acad.Sci.USA 111: E1072-E1081

  • DOI: 10.1073/pnas.1319122111

  • PubMed Abstract: 
  • The multifunctional Creb-binding protein (CBP) protein plays a pivotal role in many critical cellular processes. Here we demonstrate that the bromodomain of CBP binds to histone H3 acetylated on lysine 56 (K56Ac) with higher affinity than to its othe ...

    The multifunctional Creb-binding protein (CBP) protein plays a pivotal role in many critical cellular processes. Here we demonstrate that the bromodomain of CBP binds to histone H3 acetylated on lysine 56 (K56Ac) with higher affinity than to its other monoacetylated binding partners. We show that autoacetylation of CBP is critical for the bromodomain-H3 K56Ac interaction, and we propose that this interaction occurs via autoacetylation-induced conformation changes in CBP. Unexpectedly, the bromodomain promotes acetylation of H3 K56 on free histones. The CBP bromodomain also interacts with the histone chaperone anti-silencing function 1 (ASF1) via a nearby but distinct interface. This interaction is necessary for ASF1 to promote acetylation of H3 K56 by CBP, indicating that the ASF1-bromodomain interaction physically delivers the histones to the histone acetyl transferase domain of CBP. A CBP bromodomain mutation manifested in Rubinstein-Taybi syndrome has compromised binding to both H3 K56Ac and ASF1, suggesting that these interactions are important for the normal function of CBP.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University of Texas MD Anderson Cancer Center, Houston, TX 77030.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CREB-binding protein
A, B
116Homo sapiensMutation(s): 0 
Gene Names: CREBBP (CBP)
EC: 2.3.1.48
Find proteins for Q92793 (Homo sapiens)
Go to Gene View: CREBBP
Go to UniProtKB:  Q92793
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download SDF File 
Download CCD File 
A, B
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

Download SDF File 
Download CCD File 
A
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.149 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 121.790α = 90.00
b = 121.790β = 90.00
c = 40.710γ = 120.00
Software Package:
Software NamePurpose
d*TREKdata scaling
d*TREKdata reduction
HKL-2000data collection
PHENIXrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-03-12
    Type: Initial release
  • Version 1.1: 2014-04-23
    Type: Database references
  • Version 1.2: 2014-04-30
    Type: Structure summary