Discovery, X-ray structure and CPP-conjugation enabled uptake of p53/MDM2 macrocyclic peptide inhibitors.
RSC Chem Biol
; 2(6): 1661-1668, 2021 Dec 02.
Article
em En
| MEDLINE
| ID: mdl-34977581
ABSTRACT
Mouse double minute 2 homolog (MDM2, Hdm2) is an important negative regulator of the tumor suppressor p53. Using a mRNA based display technique to screen a library of >1012 in vitro-translated cyclic peptides, we have identified a macrocyclic ligand that shows picomolar potency on MDM2. X-Ray crystallography reveals a novel binding mode utilizing a unique pharmacophore to occupy the Phe/Trp/Leu pockets on MDM2. Conjugation of a cyclic cell-penetrating peptide (cCPP) to the initially non cell-permeable ligand enables cellular uptake and a pharmacodynamic response in SJSA-1 cells. The demonstrated enhanced intracellular availability of cyclic peptides that are identified by a display technology exemplifies a process for the application of intracellular tools for drug discovery projects.
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MEDLINE
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Ano de publicação:
2021
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Article