Transcription factor dimerization activates the p300 acetyltransferase

Experimental Data Snapshot

  • Resolution: 3.10 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.211 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Transcription factor dimerization activates the p300 acetyltransferase.

Ortega, E.Rengachari, S.Ibrahim, Z.Hoghoughi, N.Gaucher, J.Holehouse, A.S.Khochbin, S.Panne, D.

(2018) Nature 562: 538-544

  • DOI: https://doi.org/10.1038/s41586-018-0621-1
  • Primary Citation of Related Structures:  
    6GYR, 6GYT

  • PubMed Abstract: 

    The transcriptional co-activator p300 is a histone acetyltransferase (HAT) that is typically recruited to transcriptional enhancers and regulates gene expression by acetylating chromatin. Here we show that the activation of p300 directly depends on the activation and oligomerization status of transcription factor ligands. Using two model transcription factors, IRF3 and STAT1, we demonstrate that transcription factor dimerization enables the trans-autoacetylation of p300 in a highly conserved and intrinsically disordered autoinhibitory lysine-rich loop, resulting in p300 activation. We describe a crystal structure of p300 in which the autoinhibitory loop invades the active site of a neighbouring HAT domain, revealing a snapshot of a trans-autoacetylation reaction intermediate. Substrate access to the active site involves the rearrangement of an autoinhibitory RING domain. Our data explain how cellular signalling and the activation and dimerization of transcription factors control the activation of p300, and therefore explain why gene transcription is associated with chromatin acetylation.

  • Organizational Affiliation

    Max Planck Institute for Biophysical Chemistry, Department of Molecular Biology, Göttingen, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Histone acetyltransferase p300
A, B, C, D
588Homo sapiensMutation(s): 1 
Gene Names: EP300P300
EC: (PDB Primary Data), 2.3.1 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for Q09472 (Homo sapiens)
Explore Q09472 
Go to UniProtKB:  Q09472
PHAROS:  Q09472
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ09472
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on 01K

Download Ideal Coordinates CCD File 
H [auth A],
M [auth B],
R [auth C],
V [auth D]
[(2R,3S,4R,5R)-5-(6-amino-9H-purin-9-yl)-4-hydroxy-3-(phosphonooxy)tetrahydrofuran-2-yl]methyl (3R,20R)-20-carbamoyl-3-hydroxy-2,2-dimethyl-4,8,14,22-tetraoxo-12-thia-5,9,15,21-tetraazatricos-1-yl dihydrogen diphosphate
C31 H53 N10 O19 P3 S
Query on ZN

Download Ideal Coordinates CCD File 
E [auth A]
F [auth A]
G [auth A]
I [auth A]
J [auth B]
E [auth A],
F [auth A],
G [auth A],
I [auth A],
J [auth B],
K [auth B],
L [auth B],
N [auth B],
O [auth C],
P [auth C],
Q [auth C],
S [auth D],
T [auth D],
U [auth D]
Experimental Data & Validation

Experimental Data

  • Resolution: 3.10 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.211 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.826α = 90
b = 146.717β = 91.75
c = 116.477γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-10-17
    Type: Initial release
  • Version 1.1: 2018-10-24
    Changes: Data collection, Database references
  • Version 1.2: 2018-11-14
    Changes: Author supporting evidence, Data collection, Database references