Tandem virtual screening targeting the SRA domain of UHRF1 identifies a novel chemical tool modulating DNA methylation.
Fiche publication
Date publication
mai 2016
Journal
European journal of medicinal chemistry
Auteurs
Membres identifiés du Cancéropôle Est :
Dr BRONNER Christian
Tous les auteurs :
Myrianthopoulos V, Cartron PF, Liutkevičiūtė Z, Klimašauskas S, Matulis D, Bronner C, Martinet N, Mikros E
Lien Pubmed
Résumé
Ubiquitin-like protein UHRF1 that contains PHD and RING finger domain 1 is a key epigenetic protein enabling maintenance of the DNA methylation status through replication. A tandem virtual screening approach was implemented for identifying small molecules able to bind the 5-methylcytosine pocket of UHRF1 and inhibit its functionality. The NCI/DTP small molecules Repository was screened in silico by a combined protocol implementing structure-based and ligand-based methodologies. Consensus ranking was utilized to select a set of 27 top-ranked compounds that were subsequently evaluated experimentally in a stepwise manner for their ability to demethylate DNA in cellulo using PCR-MS and HPLC-MS/MS. The most active molecules were further assessed in a cell-based setting by the Proximity Ligation In Situ Assay and the ApoTome technology. Both evaluations confirmed that the DNMT1/UHRF1 interactions were significantly reduced after 4 h of incubation of U251 glioma cells with the most potent compound NSC232003, showing a 50% interaction inhibition at 15 μM as well as induction of global DNA cytosine demethylation as measured by ELISA. This is the first report of a chemical tool that targets UHRF1 and modulates DNA methylation in a cell context by potentially disrupting DNMT1/UHRF1 interactions. Compound NSC232003, a uracil derivative freely available by the NCI/DTP Repository, provides a versatile lead for developing highly potent and cell-permeable UHRF1 inhibitors that will enable dissection of DNA methylation inheritance.
Mots clés
CCAAT-Enhancer-Binding Proteins, antagonists & inhibitors, DNA Methylation, drug effects, Dose-Response Relationship, Drug, Drug Evaluation, Preclinical, Humans, MCF-7 Cells, Models, Molecular, Molecular Structure, Protein Domains, drug effects, Small Molecule Libraries, chemistry, Structure-Activity Relationship
Référence
Eur J Med Chem. 2016 May;114:390-6