Primary Citation of Related Structures: 1ABO, 1ABQ, 1FYN
PubMed Abstract:
Src-homology 3 (SH3) domains bind to proline-rich motifs in target proteins. We have determined high-resolution crystal structures of the complexes between the SH3 domains of Abl and Fyn tyrosine kinases, and two ten-residue proline-rich peptides derived from the SH3-binding proteins 3BP-1 and 3BP-2 ...
Src-homology 3 (SH3) domains bind to proline-rich motifs in target proteins. We have determined high-resolution crystal structures of the complexes between the SH3 domains of Abl and Fyn tyrosine kinases, and two ten-residue proline-rich peptides derived from the SH3-binding proteins 3BP-1 and 3BP-2. The X-ray data show that the basic mode of binding of both proline-rich peptides is the same. Peptides are bound over their entire length and interact with three major sites on the SH3 molecules by both hydrogen-bonding and van der Waals contacts. Residues 4-10 of the peptide adopt the conformation of a left-handed polyproline helix type II. Binding of the proline at position 2 requires a kink at the non-proline position 3.
Related Citations:
Crystal Structure of the SH3 Domain in Human Fyn. Comparison of the Three-Dimensional Structures of the SH3 Domain in Tyrosine Kinases and Spectrin Noble, M.E.M., Musacchio, A., Courtneidge, S., Saraste, M., Wierenga, R. (1993) EMBO J 12: 2617
Identification of a Ten-Amino Acid SH3 Binding Site Ren, R., Mayer, B., Clark, K.L., Baltimore, D. (1993) Science 259: 1157
Crystal Structure of a Src-Homology 3 (SH3) Domain Musacchio, A., Noble, M.E.M., Pauptit, R., Wierenga, R., Saraste, M. (1992) Nature 359: 851
Organizational Affiliation:
European Molecular Biology Laboratory, Heidelberg, Germany.
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