PMID: 17239860 , Related PDB id: 2DWV

Authors:

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

Title:

Solution structure of an atypical WW domain in a novel beta-clam-like dimeric form.

Journal:

FEBS Lett. 2007 Feb 6;581(3):462-8. Epub 2007 Jan 16.

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.