Abstract
Based on the prevalence of modular protein domains, such as Src homology domain 3 and 2 (SH3 and SH2), among important signaling molecules, we have sought to identify new SH3 domain-containing proteins. However, modest sequence similarity among these domains restricts the use of DNA-based methods for this purpose. To circumvent this limitation, we have developed a functional screen that permits the rapid cloning of modular domains based on their ligand-binding activity. Using operationally defined SH3 ligands from combinatorial peptide libraries, we screened a series of mouse and human cDNA expression libraries. We found that 69 of the 74 clones isolated encode at least one SH3 domain. These clones encode 18 different SH3-containing proteins, 10 of which have not been described previously. The isolation of entire repertoires of modular domain-containing proteins will prove invaluable in genome analysis and in bringing new targets into drug discovery programs.
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Sparks, A., Hoffman, N., McConnell, S. et al. Cloning of ligand targets: Systematic isolation of SH3 domain-containing proteins. Nat Biotechnol 14, 741–744 (1996). https://doi.org/10.1038/nbt0696-741
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DOI: https://doi.org/10.1038/nbt0696-741