3U15

Structure of hDMX with Dimer Inducing Indolyl Hydantoin RO-2443


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.184 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Activation of the p53 pathway by small-molecule-induced MDM2 and MDMX dimerization.

Graves, B.Thompson, T.Xia, M.Janson, C.Lukacs, C.Deo, D.Di Lello, P.Fry, D.Garvie, C.Huang, K.S.Gao, L.Tovar, C.Lovey, A.Wanner, J.Vassilev, L.T.

(2012) Proc.Natl.Acad.Sci.USA 109: 11788-11793

  • DOI: 10.1073/pnas.1203789109
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Activation of p53 tumor suppressor by antagonizing its negative regulator murine double minute (MDM)2 has been considered an attractive strategy for cancer therapy and several classes of p53-MDM2 binding inhibitors have been developed. However, these ...

    Activation of p53 tumor suppressor by antagonizing its negative regulator murine double minute (MDM)2 has been considered an attractive strategy for cancer therapy and several classes of p53-MDM2 binding inhibitors have been developed. However, these compounds do not inhibit the p53-MDMX interaction, and their effectiveness can be compromised in tumors overexpressing MDMX. Here, we identify small molecules that potently block p53 binding with both MDM2 and MDMX by inhibitor-driven homo- and/or heterodimerization of MDM2 and MDMX proteins. Structural studies revealed that the inhibitors bind into and occlude the p53 pockets of MDM2 and MDMX by inducing the formation of dimeric protein complexes kept together by a dimeric small-molecule core. This mode of action effectively stabilized p53 and activated p53 signaling in cancer cells, leading to cell cycle arrest and apoptosis. Dual MDM2/MDMX antagonists restored p53 apoptotic activity in the presence of high levels of MDMX and may offer a more effective therapeutic modality for MDMX-overexpressing cancers.


    Organizational Affiliation

    Roche Research Center, Hoffmann-La Roche Inc., Nutley, NJ 07110, USA. bradford.graves@roche.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein Mdm4
A, B, C, D
100Homo sapiensMutation(s): 1 
Gene Names: MDM4 (MDMX)
Find proteins for O15151 (Homo sapiens)
Go to Gene View: MDM4
Go to UniProtKB:  O15151
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, D
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
03M
Query on 03M

Download SDF File 
Download CCD File 
A, B, C, D
(5Z)-5-[(6-chloro-7-methyl-1H-indol-3-yl)methylidene]-3-(3,4-difluorobenzyl)imidazolidine-2,4-dione
C20 H14 Cl F2 N3 O2
OEXMEVPQEPHTAQ-IDUWFGFVSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
03MIC50: 41 nM BINDINGMOAD
03MKd: 78 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.184 
  • Space Group: P 31
Unit Cell:
Length (Å)Angle (°)
a = 73.031α = 90.00
b = 73.031β = 90.00
c = 68.774γ = 120.00
Software Package:
Software NamePurpose
MAR345data collection
REFMACrefinement
PHASERphasing
CrystalCleardata scaling
CrystalCleardata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-06-27
    Type: Initial release
  • Version 1.1: 2012-07-25
    Type: Database references
  • Version 1.2: 2012-08-01
    Type: Database references
  • Version 1.3: 2017-11-08
    Type: Refinement description