1. From Tethered to Freestanding Stabilizers of 14-3-3 Protein-Protein Interactions through Fragment Linking.
- Author
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Visser, Emira, Jaishankar, Priyadarshini, Sijbesma, Eline, Pennings, Marloes, Vandenboorn, Edmee, Guillory, Xavier, Neitz, R, Morrow, John, Dutta, Shubhankar, Renslo, Adam, Brunsveld, Luc, Arkin, Michelle, and Ottmann, Christian
- Subjects
Drug Discovery ,Fragment Linking ,Fragment-Based Drug Discovery ,Molecular Glues ,Proteins ,14-3-3 Proteins ,Estrogen Receptor alpha ,Protein Binding ,Drug Discovery - Abstract
Small-molecule stabilization of protein-protein interactions (PPIs) is a promising strategy in chemical biology and drug discovery. However, the systematic discovery of PPI stabilizers remains a largely unmet challenge. Herein we report a fragment-linking approach targeting the interface of 14-3-3 and a peptide derived from the estrogen receptor alpha (ERα) protein. Two classes of fragments-a covalent and a noncovalent fragment-were co-crystallized and subsequently linked, resulting in a noncovalent hybrid molecule in which the original fragment interactions were largely conserved. Supported by 20 crystal structures, this initial hybrid molecule was further optimized, resulting in selective, 25-fold stabilization of the 14-3-3/ERα interaction. The high-resolution structures of both the single fragments, their co-crystal structures and those of the linked fragments document a feasible strategy to develop orthosteric PPI stabilizers by linking to an initial tethered fragment.
- Published
- 2023