Protein-protein interaction domain

Protein-protein interaction domains are modular regions, typically 35–150 amino acids in length, within proteins that enable them to bind specifically to other proteins or protein motifs through recognition of short linear or post-translationally modified sequences (such as phosphotyrosine for SH2 domains or proline-rich motifs for SH3 domains)[2][7]. These domains serve as “plug-and-play” elements in multidomain proteins, controlling the assembly of signal transduction complexes, cytoskeletal dynamics, protein localization, and the integration of complex cellular responses[2][6][7]. Each domain type recognizes a consensus sequence or structural motif, and their ability to form transient, regulated interactions is crucial for nearly all aspects of cell biology and disease. While they are not themselves drug targets in the sense of a canonical receptor or enzyme, individual protein-protein interaction domains (such as SH2, SH3, or PDZ domains) within specific proteins can serve as the focus of therapeutic intervention in diseases like cancer or viral infection, via the disruption of critical protein interactions[5][7].

Other names

Protein interaction domainsPIDsinteraction domains

Inhibition or stabilization of specific protein-protein interactions through direct binding to interaction domains (e.g., blocking SH2 or SH3 domain recognition) Modulation of signaling complexes via disruption or stabilization of domain-peptide or domain-domain interactions