Structure of Mdm2 with low molecular weight inhibitor

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 

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A Unique Mdm2-Binding Mode of the 3-Pyrrolin-2-one- and 2-Furanone-Based Antagonists of the p53-Mdm2 Interaction.

Surmiak, E.Twarda-Clapa, A.Zak, K.M.Musielak, B.Tomala, M.D.Kubica, K.Grudnik, P.Madej, M.Jablonski, M.Potempa, J.Kalinowska-Tluscik, J.Domling, A.Dubin, G.Holak, T.A.

(2016) ACS Chem Biol 11: 3310-3318

  • DOI: https://doi.org/10.1021/acschembio.6b00596
  • Primary Citation of Related Structures:  
    4ZFI, 4ZGK

  • PubMed Abstract: 

    The p53 pathway is inactivated in almost all types of cancer by mutations in the p53 encoding gene or overexpression of the p53 negative regulators, Mdm2 and/or Mdmx. Restoration of the p53 function by inhibition of the p53-Mdm2/Mdmx interaction opens up a prospect for a nongenotoxic anticancer therapy. Here, we present the syntheses, activities, and crystal structures of two novel classes of Mdm2-p53 inhibitors that are based on the 3-pyrrolin-2-one and 2-furanone scaffolds. The structures of the complexes formed by these inhibitors and Mdm2 reveal the dimeric protein molecular organization that has not been observed in the small-molecule/Mdm2 complexes described until now. In particular, the 6-chloroindole group does not occupy the usual Trp-23 pocket of Mdm2 but instead is engaged in dimerization. This entirely unique binding mode of the compounds opens new possibilities for optimization of the Mdm2-p53 interaction inhibitors.

  • Organizational Affiliation

    Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Krakow, Poland.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
E3 ubiquitin-protein ligase Mdm2
A, B, C, D
97Homo sapiensMutation(s): 0 
Gene Names: MDM2
EC: 6.3.2
UniProt & NIH Common Fund Data Resources
Find proteins for Q00987 (Homo sapiens)
Explore Q00987 
Go to UniProtKB:  Q00987
GTEx:  ENSG00000135679 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ00987
Sequence Annotations
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
4NJ BindingDB:  4ZFI Kd: min: 500, max: 1000 (nM) from 2 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.36α = 90
b = 70.25β = 90
c = 96.44γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PDB_EXTRACTdata extraction

Structure Validation

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Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
the Foundation for Polish SciencePolandTEAM Programme
the polish National Centre of SciencePolandUMO-2011/01/D/NZ1/01169

Revision History  (Full details and data files)

  • Version 1.0: 2016-10-19
    Type: Initial release
  • Version 1.1: 2016-12-28
    Changes: Database references
  • Version 1.2: 2024-01-10
    Changes: Data collection, Database references, Refinement description