5GSA

EED in complex with an allosteric PRC2 inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.49 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

An allosteric PRC2 inhibitor targeting the H3K27me3 binding pocket of

Qi, W.Zhao, K.Gu, J.Huang, Y.Wang, Y.Zhang, H.Zhang, M.Zhang, J.Yu, Z.Li, L.Teng, L.Chuai, S.Zhang, C.Zhao, M.Chan, H.Chen, Z.Fang, D.Fei, Q.Feng, L.Feng, L.Gao, Y.Ge, H.Ge, X.Li, G.Lingel, A.Lin, Y.Liu, Y.Luo, F.Shi, M.Wang, L.Wang, Z.Yu, Y.Zeng, J.Zeng, C.Zhang, L.Zhang, Q.Zhou, S.Oyang, C.Atadja, P.Li, E.

(2017) Nat Chem Biol 13: 381-388

  • DOI: 10.1038/nchembio.2304
  • Primary Citation of Related Structures:  
    5GSA

  • PubMed Abstract: 
  • Polycomb repressive complex 2 (PRC2) consists of three core subunits, EZH2, EED and SUZ12, and plays pivotal roles in transcriptional regulation. The catalytic subunit EZH2 methylates histone H3 lysine 27 (H3K27), and its activity is further enhanced ...

    Polycomb repressive complex 2 (PRC2) consists of three core subunits, EZH2, EED and SUZ12, and plays pivotal roles in transcriptional regulation. The catalytic subunit EZH2 methylates histone H3 lysine 27 (H3K27), and its activity is further enhanced by the binding of EED to trimethylated H3K27 (H3K27me3). Small-molecule inhibitors that compete with the cofactor S-adenosylmethionine (SAM) have been reported. Here we report the discovery of EED226, a potent and selective PRC2 inhibitor that directly binds to the H3K27me3 binding pocket of EED. EED226 induces a conformational change upon binding EED, leading to loss of PRC2 activity. EED226 shows similar activity to SAM-competitive inhibitors in blocking H3K27 methylation of PRC2 target genes and inducing regression of human lymphoma xenograft tumors. Interestingly, EED226 also effectively inhibits PRC2 containing a mutant EZH2 protein resistant to SAM-competitive inhibitors. Together, we show that EED226 inhibits PRC2 activity via an allosteric mechanism and offers an opportunity for treatment of PRC2-dependent cancers.


    Organizational Affiliation

    Novartis Institutes for BioMedical Research, Shanghai, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Polycomb protein EEDAB367Homo sapiensMutation(s): 0 
Gene Names: EED
Find proteins for O75530 (Homo sapiens)
Explore O75530 
Go to UniProtKB:  O75530
NIH Common Fund Data Resources
PHAROS  O75530
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Histone-lysine N-methyltransferase EZH2CD29Homo sapiensMutation(s): 0 
Gene Names: EZH2KMT6
EC: 2.1.1.43 (PDB Primary Data), 2.1.1.356 (UniProt)
Find proteins for Q15910 (Homo sapiens)
Explore Q15910 
Go to UniProtKB:  Q15910
NIH Common Fund Data Resources
PHAROS  Q15910
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
73K
Query on 73K

Download CCD File 
A, B
N-(furan-2-ylmethyl)-8-(4-methylsulfonylphenyl)-[1,2,4]triazolo[4,3-c]pyrimidin-5-amine
C17 H15 N5 O3 S
DYIRSNMPIZZNBK-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
73KKd:  82.5   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.49 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.185 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.793α = 90
b = 177.908β = 90
c = 50.532γ = 90
Software Package:
Software NamePurpose
SCALEPACKdata scaling
BUSTER-TNTrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-02-01
    Type: Initial release
  • Version 1.1: 2017-04-05
    Changes: Database references