Exploration of a 14-3-3 PPI Pocket by Covalent Fragments as Stabilizers

The systematic discovery of functional fragments binding to the composite interface of protein complexes is a first critical step for the development of orthosteric stabilizers of protein-protein interactions (PPIs). We have previously shown that disulfide trapping successfully yielded covalent stab...

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Bibliographic Details
Published in:ACS medicinal chemistry letters Vol. 12; no. 6; p. 976
Main Authors: Sijbesma, Eline, Hallenbeck, Kenneth K, Andrei, Sebastian A, Rust, Reanne R, Adriaans, Joris M C, Brunsveld, Luc, Arkin, Michelle R, Ottmann, Christian
Format: Journal Article
Language:English
Published: 10.06.2021
ISSN:1948-5875, 1948-5875
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Summary:The systematic discovery of functional fragments binding to the composite interface of protein complexes is a first critical step for the development of orthosteric stabilizers of protein-protein interactions (PPIs). We have previously shown that disulfide trapping successfully yielded covalent stabilizers for the PPI of 14-3-3 with the estrogen receptor ERα. Here we provide an assessment of the composite PPI target pocket and the molecular characteristics of various fragments binding to a specific subpocket. Evaluating structure-activity relationships highlights the basic principles for PPI stabilization by these covalent fragments that engage a relatively large and exposed binding pocket at the protein/peptide interface with a "molecular glue" mode of action.The systematic discovery of functional fragments binding to the composite interface of protein complexes is a first critical step for the development of orthosteric stabilizers of protein-protein interactions (PPIs). We have previously shown that disulfide trapping successfully yielded covalent stabilizers for the PPI of 14-3-3 with the estrogen receptor ERα. Here we provide an assessment of the composite PPI target pocket and the molecular characteristics of various fragments binding to a specific subpocket. Evaluating structure-activity relationships highlights the basic principles for PPI stabilization by these covalent fragments that engage a relatively large and exposed binding pocket at the protein/peptide interface with a "molecular glue" mode of action.
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ISSN:1948-5875
1948-5875
DOI:10.1021/acsmedchemlett.1c00088