Solution structures of the YAP65 WW domain and the variant L30 K in complex with the peptides GTPPPPYTVG, N-(n-octyl)-GPPPY and PLPPY and the application of peptide libraries reveal a minimal binding epitope.
Pires, J.R., Taha-Nejad, F., Toepert, F., Ast, T., Hoffmuller, U., Schneider-Mergener, J., Kuhne, R., Macias, M.J., Oschkinat, H.(2001) J Mol Biol 314: 1147-1156
- PubMed: 11743730 
- DOI: 10.1006/jmbi.2000.5199
- Primary Citation of Related Structures:  
1JMQ, 1K9Q, 1K9R - PubMed Abstract: 
The single mutation L30 K in the Hu-Yap65 WW domain increased the stability of the complex with the peptide GTPPPPYTVG (K(d)=40(+/-5) microM). Here we report the refined solution structure of this complex by NMR spectroscopy and further derived structure-activity relationships by using ligand peptide libraries with truncated sequences and a substitution analysis that yielded acetyl-PPPPY as the smallest high-affinity binding peptide (K(d)=60 microM) ...