3IO2

Crystal structure of the Taz2 domain of p300


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Structure of the Taz2 domain of p300: insights into ligand binding.

Miller, M.Dauter, Z.Cherry, S.Tropea, J.E.Wlodawer, A.

(2009) Acta Crystallogr.,Sect.D 65: 1301-1308

  • DOI: 10.1107/S0907444909040153

  • PubMed Abstract: 
  • CBP and its paralog p300 are histone acetyl transferases that regulate gene expression by interacting with multiple transcription factors via specialized domains. The structure of a segment of human p300 protein (residues 1723-1836) corresponding to ...

    CBP and its paralog p300 are histone acetyl transferases that regulate gene expression by interacting with multiple transcription factors via specialized domains. The structure of a segment of human p300 protein (residues 1723-1836) corresponding to the extended zinc-binding Taz2 domain has been investigated. The crystal structure was solved by the SAD approach utilizing the anomalous diffraction signal of the bound Zn ions. The structure comprises an atypical helical bundle stabilized by three Zn ions and closely resembles the solution structures determined previously for shorter peptides. Residues 1813-1834 from the current construct form a helical extension of the C-terminal helix and make extensive crystal-contact interactions with the peptide-binding site of Taz2, providing additional insights into the mechanism of the recognition of diverse transactivation domains (TADs) by Taz2. On the basis of these results and molecular modeling, a hypothetical model of the binding of phosphorylated p53 TAD1 to Taz2 has been proposed.


    Organizational Affiliation

    Protein Structure Section, Macromolecular Crystallography Laboratory, NCI-Frederick, Frederick, Maryland 21702-1201, USA. mariami@mail.nih.gov




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Histone acetyltransferase p300
A
114Homo sapiensMutation(s): 4 
Gene Names: EP300 (P300)
EC: 2.3.1.48
Find proteins for Q09472 (Homo sapiens)
Go to Gene View: EP300
Go to UniProtKB:  Q09472
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.206 
  • Space Group: I 41 3 2
Unit Cell:
Length (Å)Angle (°)
a = 155.270α = 90.00
b = 155.270β = 90.00
c = 155.270γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-3000phasing
HKL-2000data reduction
SERGUIdata collection
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-11-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2012-03-21
    Type: Database references
  • Version 1.3: 2015-05-27
    Type: Refinement description
  • Version 1.4: 2016-07-13
    Type: Refinement description