Abstract
The biological functions of intracellular signaling enzymes typically depend on multiple protein-protein interactions (PPI) with substrates, scaffolding proteins, and other cytoplasmic molecules. Blocking these interactions provides an alternative means to modulate signaling activity without fully ablating the catalytic activity of the target. Several recent reports describe small-molecule antagonists that target PPI sites on signaling enzymes. These findings suggest that such sites may often be druggable. However, the hypothesis that targeting such sites might confer on the resulting inhibitors improved properties of efficacy and/or tolerability, while appealing, remains largely untested.
MeSH terms
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3-Phosphoinositide-Dependent Protein Kinases
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Adaptor Proteins, Signal Transducing / antagonists & inhibitors
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Animals
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Calcineurin Inhibitors
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Cell Cycle Proteins / antagonists & inhibitors
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Enzyme Inhibitors / pharmacology*
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Enzyme Inhibitors / therapeutic use
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HSP90 Heat-Shock Proteins / antagonists & inhibitors
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Humans
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JNK Mitogen-Activated Protein Kinases / antagonists & inhibitors
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Models, Molecular
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NFATC Transcription Factors / antagonists & inhibitors
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Polo-Like Kinase 1
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Protein Interaction Domains and Motifs / drug effects
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Protein Serine-Threonine Kinases / antagonists & inhibitors
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Proto-Oncogene Proteins / antagonists & inhibitors
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Signal Transduction / drug effects*
Substances
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Adaptor Proteins, Signal Transducing
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Calcineurin Inhibitors
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Cell Cycle Proteins
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Enzyme Inhibitors
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HSP90 Heat-Shock Proteins
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NFATC Transcription Factors
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Proto-Oncogene Proteins
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3-Phosphoinositide-Dependent Protein Kinases
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Protein Serine-Threonine Kinases
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JNK Mitogen-Activated Protein Kinases