3U15

Structure of hDMX with Dimer Inducing Indolyl Hydantoin RO-2443


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.187 

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 U S A 109: 11788-11793

  • DOI: 10.1073/pnas.1203789109
  • Primary Citation of Related Structures:  
    3U15, 3VBG

  • 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 compounds do not inhibit the p53-MDMX interaction, and their effectiveness can be compromised in tumors overexpressing MDMX ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein Mdm4 ABCD100Homo sapiensMutation(s): 1 
Gene Names: MDM4MDMX
Find proteins for O15151 (Homo sapiens)
Explore O15151 
Go to UniProtKB:  O15151
NIH Common Fund Data Resources
PHAROS:  O15151
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
03M
Query on 03M

Download Ideal Coordinates 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
SO4
Query on SO4

Download Ideal Coordinates CCD File 
A, D
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
03MKd :  78   nM  PDBBind
03MIC50:  41   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.187 
  • Space Group: P 31
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.031α = 90
b = 73.031β = 90
c = 68.774γ = 120
Software Package:
Software NamePurpose
MAR345data collection
PHASERphasing
REFMACrefinement
CrystalCleardata reduction
CrystalCleardata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

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