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
- PubMed: 27709883
- DOI: 10.1021/acschembio.6b00596
- Primary Citation of Related Structures:
- 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 open ...
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.
Faculty of Mathematics and Natural Sciences, Department of Pharmacy, University of Groningen , 9713AV Groningen, The Netherlands.,Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University , Gronostajowa 7, 30-387 Krakow, Poland.,Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Krakow, Poland.,Malopolska Centre of Biotechnology, Jagiellonian University , Gronostajowa 7a, 30-387 Krakow, Poland.