Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 13.57 kDa 
• Atom Count: 913 
• Residue Count: 109 
• Unique protein chains: 1

3IO2

Crystal structure of the Taz2 domain of p300

• DOI: 10.2210/pdb3IO2/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2009-08-13 Released: 2009-11-24 
• Deposition Author(s): Miller, M., Dauter, Z., Wlodawer, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.236 
• R-Value Work: 0.206 
• R-Value Observed: 0.208 

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 D Biol Crystallogr 65: 1301-1308

• PubMed: 19966416 
• DOI: 10.1107/S0907444909040153
• Primary Citation of Related Structures:  
  3IO2


• 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 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.

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Organizational Affiliation: 

Protein Structure Section, Macromolecular Crystallography Laboratory, NCI-Frederick, Frederick, Maryland 21702-1201, USA. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Histone acetyltransferase p300	A	114	Homo sapiens	Mutation(s): 4  Gene Names: EP300, P300 EC: 2.3.1.48 (PDB Primary Data), 2.3.1 (UniProt)
Find proteins for Q09472 (Homo sapiens) Explore Q09472  Go to UniProtKB:  Q09472
NIH Common Fund Data Resources
PHAROS:  Q09472 GTEx:  ENSG00000100393

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	A	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
ZN	A	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.236 
• R-Value Work: 0.206 
• R-Value Observed: 0.208 
• Space Group: I 4₁ 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 155.27	α = 90
b = 155.27	β = 90
c = 155.27	γ = 90

Software Package:

Software Name	Purpose
SERGUI	data collection
HKL-3000	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-08-13 
• Released Date: 2009-11-24 
Deposition Author(s): Miller, M., Dauter, Z., Wlodawer, A.

Revision History 

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