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SH2scan: Mapping SH2 domain-ligand binding selectivity for inhibitors and degraders
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SH2scan: Mapping SH2 domain-ligand binding selectivity for inhibitors and degraders
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Paper
SH2scan: Mapping SH2 domain-ligand binding selectivity for inhibitors and degraders
2025
Overview
Drug discovery targeting SH2 domains (key protein-protein interaction modules) has been hampered by a lack of assay systems evaluating synthetic ligand binding selectivity toward SH2 domains, to reduce potential off-target effects. In addition, the molecular determinants for synthetic ligand engagement to SH2 domains across the target class have yet to be defined. Here, we developed SH2scan, a high-throughput competition binding assay platform to quantify ligand-SH2 domain interactions, covering >80% of the target class. We uncovered unique binding selectivity profiles and quantified a broad range of dissociation constants (KDs) for 9 synthetic ligands of SH2 domains from the scientific literature with a range of reported primary targets. These results demonstrate that SH2scan can be used to design more selective compounds targeting SH2 domains. The platform can be further leveraged for the discovery of new molecular probes for the dissection of cellular protein-protein interaction networks.
Publisher
Cold Spring Harbor Laboratory
Subject
