8GCG

MDM2 bound to inhibitor

This is a non-PDB format compatible entry.

Summary for 8GCG

• Entry DOI: 10.2210/pdb8gcg/pdb
• Descriptor: E3 ubiquitin-protein ligase Mdm2, macrocyclic peptide inhibitor (3 entities in total)
• Functional Keywords: e3 ubiquitin-protein ligase, transferase, ligase, transferase-inhibitor complex, transferase/inhibitor
• Biological source: Homo sapiens (human); More
• Total number of polymer chains: 2
• Total formula weight: 13781.67

Authors

Silvestri, A.P.,Muir, E.W.,Chakka, S.K.,Tripathi, S.M.,Rubin, S.M.,Pye, C.R.,Schwochert, J.A. (deposition date: 2023-03-01, release date: 2024-10-23)

Primary citation

Silvestri, A.P.,Zhang, Q.,Ping, Y.,Muir, E.W.,Zhao, J.,Chakka, S.K.,Wang, G.,Bray, W.M.,Chen, W.,Fribourgh, J.L.,Tripathi, S.,He, Y.,Rubin, S.M.,Satz, A.L.,Pye, C.R.,Kuai, L.,Su, W.,Schwochert, J.A.
DNA-Encoded Macrocyclic Peptide Libraries Enable the Discovery of a Neutral MDM2-p53 Inhibitor.
Acs Med.Chem.Lett., 14:820-826, 2023

PubMed Abstract: Synthetic macrocyclic peptides are an emerging molecular class for both targeting intracellular protein-protein interactions (PPIs) and providing an oral modality for drug targets typically addressed by biologics. Display technologies, such as mRNA and phage display, often yield peptides that are too large and too polar to achieve passive permeability or oral bioavailability without substantial off-platform medicinal chemistry. Herein, we use DNA-encoded cyclic peptide libraries to discover a neutral nonapeptide, UNP-6457, that inhibits MDM2-p53 interaction with an IC of 8.9 nM. X-ray structural analysis of the MDM2-UNP-6457 complex revealed mutual binding interactions and identified key ligand modification points which may be tuned to enhance its pharmacokinetic profile. These studies showcase how tailored DEL libraries can directly yield macrocyclic peptides benefiting from low MW, TPSA, and HBD/HBA counts that are capable of potently inhibiting therapeutically relevant protein-protein interactions.

PubMed: 37312849
DOI: 10.1021/acsmedchemlett.3c00117

Experimental method

X-RAY DIFFRACTION (1.47 Å)