Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 33614.70 
• Atom Count: 2326 
• Residue Count: 255 
• Unique protein chains: 1

1RV1

CRYSTAL STRUCTURE OF HUMAN MDM2 WITH AN IMIDAZOLINE INHIBITOR

• DOI: 10.2210/pdb1RV1/pdb

• Classification: LIGASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21
• Mutation(s): 1 


• Deposited: 2003-12-12 Released: 2004-01-20 
• Deposition Author(s): Lukacs, C., Kammlott, U., Graves, B.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Free: 0.322 
• R-Value Work: 0.256 

Literature

In vivo activation of the p53 pathway by small-molecule antagonists of MDM2.

Vassilev, L.T., Vu, B.T., Graves, B., Carvajal, D., Podlaski, F., Filipovic, Z., Kong, N., Kammlott, U., Lukacs, C., Klein, C., Fotouhi, N., Liu, E.A.

(2004) Science 303: 844-848

• PubMed: 14704432 
• DOI: 10.1126/science.1092472
• Also Cited By: 4J7E, 4J7D, 4J74, 4J3E


• PubMed Abstract: 
  

MDM2 binds the p53 tumor suppressor protein with high affinity and negatively modulates its transcriptional activity and stability. Overexpression of MDM2, found in many human tumors, effectively impairs p53 function. Inhibition of MDM2-p53 interaction can stabilize p53 and may offer a novel strategy for cancer therapy. Here, we identify potent and selective small-molecule antagonists of MDM2 and confirm their mode of action through the crystal structures of complexes. These compounds bind MDM2 in the p53-binding pocket and activate the p53 pathway in cancer cells, leading to cell cycle arrest, apoptosis, and growth inhibition of human tumor xenografts in nude mice.

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Organizational Affiliation: 

Department of Discovery Oncology, Roche Research Center, Hoffmann-La Roche, Inc., Nutley, NJ 07110, USA. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Ubiquitin-protein ligase E3 Mdm2	A, B, C	85	Homo sapiens	Mutation(s): 1  Gene Names: MDM2 EC: 2.3.2.27
Find proteins for Q00987 (Homo sapiens) Go to Gene View: MDM2 Go to UniProtKB:  Q00987

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
IMZ	A, B, C	CIS-[4,5-BIS-(4-BROMOPHENYL)-2-(2-ETHOXY-4-METHOXYPHENYL)-4,5-DIHYDROIMIDAZOL-1-YL]-[4-(2-HYDROXYETHYL)PIPERAZIN-1-YL]METHANONE C31 H34 Br2 N4 O4 PVRYEWOXWGDQHA-URLMMPGGSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
IMZ	IC50: 100 - 140 nM (98) BINDINGDB
IMZ	IC50: 140 nM BINDINGMOAD
IMZ	IC50: 140 nM PDBBIND

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Free: 0.322 
• R-Value Work: 0.256 
• Space Group: C 1 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 122.264	α = 90.00
b = 39.727	β = 114.29
c = 79.362	γ = 90.00

Software Package:

Software Name	Purpose
HKL-2000	data reduction
MOLREP	phasing
HKL-2000	data collection
CNX	refinement
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-12-12 
• Released Date: 2004-01-20 
• Deposition Author(s): Lukacs, C., Kammlott, U., Graves, B.

Revision History 

• Version 1.0: 2004-01-20
  Type: Initial release
• Version 1.1: 2008-04-29
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance