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In the Src Homology 3 domain (SH3) the RT and n-Src loops form a pocket that accounts for the specificity and affinity in binding of proline rich motifs (PRMs), while the distal and diverging turns play a key role in the folding of the protein. We have solved the structure of a chimeric mutant c-Src-SH3 domain where specific residues at the RT- and n-Src-loops have been replaced by those present in...
Here we report the first crystal structure of the SH3 domain of the cellular Src tyrosine kinase (c-Src-SH3) domain on its own. In the crystal two molecules of c-Src-SH3 exchange their –RT loops generating an intertwined dimer, in which the two SH3 units, preserving the binding site configuration, are oriented to allow simultaneous binding of two ligand molecules. The dimerization of c-Src-SH3 is...
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