The high-resolution NMR structure of the R21A Spc-SH3:P41 complex: Understanding the determinants of binding affinity by comparison with Abl-SH3
Casares, S., Ab, E., Eshuis, H., Lopez-Mayorga, O., van Nuland, N.A.J., Conejero-Lara, F.(2007) BMC Struct Biol 7: 22-22
- PubMed: 17407569 
- DOI: https://doi.org/10.1186/1472-6807-7-22
- Primary Citation of Related Structures:  
2JM8, 2JM9, 2JMA - PubMed Abstract: 
SH3 domains are small protein modules of 60-85 amino acids that bind to short proline-rich sequences with moderate-to-low affinity and specificity. Interactions with SH3 domains play a crucial role in regulation of many cellular processes (some are related to cancer and AIDS) and have thus been interesting targets in drug design. The decapeptide APSYSPPPPP (p41) binds with relatively high affinity to the SH3 domain of the Abl tyrosine kinase (Abl-SH3), while it has a 100 times lower affinity for the alpha-spectrin SH3 domain (Spc-SH3).
Organizational Affiliation: 
Departamento de Química Física e Instituto de Biotecnología, Facultad de Ciencias, Universidad de Granada, Granada, Spain. scasares@ugr.es