6GYR

Transcription factor dimerization activates the p300 acetyltransferase

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.211 

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This is version 1.2 of the entry. See complete history. 


Literature

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: 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 ...

    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: 

    Leicester Institute of Structural and Chemical Biology, Department of Molecular and Cell Biology, University of Leicester, Leicester, UK. daniel.panne@le.ac.uk.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Histone acetyltransferase p300A, B, C, D588Homo sapiensMutation(s): 1 
Gene Names: EP300, P300
EC: 2.3.1.48 (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
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
01K
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
YGZKIOPJGFQDSR-VLHHDIFDSA-N		 Ligand Interaction
ZN
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]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • 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
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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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