Exploration of a 14-3-3 PPI Pocket by Covalent Fragments as Stabilizers.
ACS Med Chem Lett 2021;
12:976-982. [PMID:
34136078 PMCID:
PMC8201753 DOI:
10.1021/acsmedchemlett.1c00088]
[Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 05/04/2021] [Indexed: 12/20/2022] Open
Abstract
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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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