High-resolution structure of an alpha-spectrin SH3-domain mutant with a redesigned hydrophobic core.
Camara-Artigas, A., Andujar-Sanchez, M., Ortiz-Salmeron, E., Cuadri, C., Cobos, E.S., Martin-Garcia, J.M.(2010) Acta Crystallogr Sect F Struct Biol Cryst Commun 66: 1023-1027
- PubMed: 20823517 
- DOI: https://doi.org/10.1107/S1744309110030095
- Primary Citation of Related Structures:  
3NGP - PubMed Abstract: 
The alpha-spectrin SH3 domain (Spc-SH3) is a small modular domain which has been broadly used as a model protein in folding studies and these studies have sometimes been supported by structural information obtained from the coordinates of Spc-SH3 mutants. The structure of B5/D48G, a multiple mutant designed to improve the hydrophobic core and as a consequence the protein stability, has been solved at 1 A resolution. The crystals belonged to the orthorhombic space group P2(1)2(1)2(1), with unit-cell parameters a=24.79, b=37.23, c=62.95 A. This mutant also bears a D48G substitution in the distal loop and this mutation has also been reported to increase the stability of the protein by itself. The structure of the B5/D48G mutant shows a highly packed hydrophobic core and a more ordered distal loop compared with previous Spc-SH3 structures.
Organizational Affiliation: 
Departamento de Química-Física, Bioquímica y Química Inorgánica, Universidad de Almería, Carretera Sacramento, Almería 04120, Spain. acamara@ual.es