Application of AlphaFold models in evaluating ligandable cysteines across E3 ligases

Author:

Koldenhof Patrick1,Bemelmans Martijn P.1,Ghosh Brahma2,Damm‐Ganamet Kelly L.3,van Vlijmen Herman W. T.1,Pande Vineet1

Affiliation:

1. Computer‐Aided Drug Design Janssen Pharmaceuticals Beerse Belgium

2. Discovery Chemistry Janssen Pharmaceuticals Spring House Pennsylvania USA

3. Computer‐Aided Drug Design Janssen Pharmaceuticals San Diego California USA

Abstract

AbstractProteolysis Targeting Chimeras (PROTACs) are an emerging therapeutic modality and chemical biology tools for Targeted Protein Degradation (TPD). PROTACs contain a ligand targeting the protein of interest, a ligand recruiting an E3 ligase and a linker connecting these two ligands. There are over 600 E3 ligases known so far, but only a handful have been exploited for TPD applications. A key reason for this is the scarcity of ligands binding various E3 ligases and the paucity of structural data available, which complicates ligand design across the family. In this study, we aim to progress PROTAC discovery by proposing a shortlist of E3 ligases that can be prioritized for covalent targeting by performing systematic structural ligandability analysis on a chemoproteomic dataset of potentially reactive cysteines across hundreds of E3 ligases. One of the goals of this study is to apply AlphaFold (AF) models for ligandability evaluations, as for a vast majority of these ligases an experimental structure is not available in the protein data bank (PDB). Using a combination of pocket features, AF model quality and additional aspects, we propose a shortlist of E3 ligases and corresponding cysteines that can be prioritized to potentially discover covalent ligands and expand the PROTAC toolbox.

Publisher

Wiley

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