Download MendeleyStructural Basis for Specific Binding of the Gads SH3 Domain to an Rxxk Motif-Containing Slp-76 Peptide: A Novel Mode of Peptide Recognition
Liu, Q., Berry, D., Nash, P., Pawson, T., Mcglade, C.J., Li, S.S.(2003) Mol Cell 11: 471
- PubMed: 12620234
- DOI: https://doi.org/10.1016/s1097-2765(03)00046-7
- Primary Citation of Related Structures:
1H3H - PubMed Abstract:
The SH3 domain, which normally recognizes proline-rich sequences, has the potential to bind motifs with an RxxK consensus. To explore this novel specificity, we have determined the solution structure of the Gads T cell adaptor C-terminal SH3 domain in complex with an RSTK-containing peptide, representing its physiological binding site on the SLP-76 docking protein. The SLP-76 peptide engages four distinct binding pockets on the surface of the Gads SH3 domain and upon binding adopts a unique structure characterized by a right-handed 3(10) helix at the RSTK locus, in contrast to the left-handed polyproline type II helix formed by canonical proline-rich SH3 ligands. The structure, and supporting mutagenesis and peptide binding data, reveal a novel mode of ligand recognition by SH3 domains.
Organizational Affiliation:
Department of Biochemistry, Faculty of Medicine and Dentistry, University of Western Ontario, N6A 5C1, London, Ontario, Canada.
