Fragment-based library generation for the discovery of a peptidomimetic p53-Mdm4 inhibitor

ACS Comb Sci. 2014 Aug 11;16(8):393-6. doi: 10.1021/co500026b. Epub 2014 Jul 11.


On the basis of our recently resolved first cocrystal structure of Mdm4 in complex with a small molecule inhibitor (PDB ID 3LBJ ), we devised an approach for the generation of potential Mdm4 selective ligands. We performed the Ugi four-component reaction (Ugi-4CR) in 96-well plates with an indole fragment, which is specially designed to mimic Trp23, a key amino acid for the interaction between p53 and Mdm4. Generally the reaction yielded mostly precipitates collected by 96-well filter plates. The best hit compound was found to be active and selective for Mdm4 (Ki=5 μM, 10-fold stronger than Mdm2). This initial hit may serve as the starting point for designing selective p53-Mdm4 inhibitor with higher affinity.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Drug Discovery
  • Humans
  • Ligands
  • Models, Molecular
  • Molecular Docking Simulation
  • Peptidomimetics / chemistry*
  • Peptidomimetics / pharmacology*
  • Protein Interaction Maps / drug effects*
  • Proto-Oncogene Proteins c-mdm2 / antagonists & inhibitors*
  • Proto-Oncogene Proteins c-mdm2 / metabolism
  • Tumor Suppressor Protein p53 / antagonists & inhibitors*
  • Tumor Suppressor Protein p53 / metabolism


  • Ligands
  • Peptidomimetics
  • Tumor Suppressor Protein p53
  • MDM2 protein, human
  • Proto-Oncogene Proteins c-mdm2