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Promiscuous Binding Nature of Sh3 Domains to their Target Proteins

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SH3 domains are small but important domains in cell-signaling and function through protein-protein interactions. Their promiscuous nature in binding to polyproline peptides makes them much more important because many SH3 domains from different proteins bind to different proteins having polyproline template on their surface. Very subtle changes in the sequence of SH3 domains and the binding peptides determine the specificity of the peptide binding. Recent observation that SH3 domains bind to non- proline peptides makes the scenario of peptide binding involving SH3 domains complicated. If domain swapped dimerization as observed in Eps8-SH3 domain also binds different peptides, it proves the versatility of the SH3 domains in binding to peptides in various ways. An overview of the promiscuity of SH3 domains has been discussed.

Keywords: promiscuous binding; sh3 domain; sh3 domain binding; src domain

Document Type: Review Article


Publication date: 2002-06-01

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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