Solution structure of an atypical WW domain in a novel beta-clam-like dimeric form
Ohnishi, S., Guntert, P., Koshiba, S., Tomizawa, T., Akasaka, R., Tochio, N., Sato, M., Inoue, M., Harada, T., Watanabe, S., Tanaka, A., Shirouzu, M., Kigawa, T., Yokoyama, S.(2007) FEBS Lett 581: 462-468
- PubMed: 17239860 
- DOI: https://doi.org/10.1016/j.febslet.2007.01.008
- Primary Citation of Related Structures:  
2DWV - PubMed Abstract: 
The WW domain is known as one of the smallest protein modules with a triple-stranded beta-sheet fold. Here, we present the solution structure of the second WW domain from the mouse salvador homolog 1 protein. This WW domain forms a homodimer with a beta-clam-like motif, as evidenced by size exclusion chromatography, analytical ultracentrifugation and NMR spectroscopy. While typical WW domains are believed to function as monomeric modules that recognize proline-rich sequences, by using conserved aromatic and hydrophobic residues that are solvent-exposed on the surface of the beta-sheet, this WW domain buries these residues in the dimer interface.
Organizational Affiliation: 
Genomic Sciences Center, RIKEN, 1-7-22 Suehiro-cho, Tsurumi, Yokohama 230-0045, Japan.