title: Structure of the WW domain of a kinase-associated protein complexed with a proline-rich peptide.
abstract: The WW domain is a new protein module with two highly conserved tryptophans that binds proline-rich peptide motifs in vitro. It is present in a number of signalling and regulatory proteins, often in several copies. Here we investigate the solution structure of the WW domain of human YAP65 (for Yes kinase-associated protein) in complex with proline-rich peptides containing the core motif PPxY. The structure of the domain with the bound peptide GTPPPPYTVG is a slightly curved, three-stranded, antiparallel beta-sheet. Two prolines pack against the first tryptophan, forming a hydrophobic buckle on the convex side of the sheet. The concave side has three exposed hydrophobic residues (tyrosine, tryptophan and leucine) which form the binding site for the ligand. A non-conserved isoleucine in the amino-terminal flanking region covers a hydrophobic patch and stabilizes the WW domain of human YAP65 in vitro. The structure of the WW domain differs from that of the SH3 domain and reveals a new design for a protein module that uses stacked aromatic surface residues to arrange a binding site for proline-rich peptides.
authors: European Molecular Biology Laboratory, Heidelberg, Germany.
authors: M J
authors: MJ
authors: Macias
authors: M
authors: M
authors: Hyvönen
authors: E
authors: E
authors: Baraldi
authors: J
authors: J
authors: Schultz
authors: M
authors: M
authors: Sudol
authors: M
authors: M
authors: Saraste
authors: H
authors: H
authors: Oschkinat
mesh_terms: D048868:Adaptor Proteins, Signal Transducing; D000595:Amino Acid Sequence; D000818:Animals; D001665:Binding Sites; D002352:Carrier Proteins / Q000737:chemistry* / Q000378:metabolism; D018797:Cell Cycle Proteins; D016384:Consensus Sequence; D006801:Humans; D051379:Mice; D008958:Models, Molecular; D008969:Molecular Sequence Data; D010455:Peptides / Q000737:chemistry* / Q000378:metabolism; D010750:Phosphoproteins / Q000737:chemistry* / Q000378:metabolism; D011392:Proline / Q000737:chemistry* / Q000378:metabolism; D055232:Proline-Rich Protein Domains; D011485:Protein Binding; D011487:Protein Conformation; D017433:Protein Structure, Secondary; D017386:Sequence Homology, Amino Acid; D014157:Transcription Factors; D000091102:YAP-Signaling Proteins
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D002352:Carrier Proteins; D018797:Cell Cycle Proteins; D010455:Peptides; D010750:Phosphoproteins; D014157:Transcription Factors; D000091102:YAP-Signaling Proteins; C088374:YAP1 protein, human; C486223:Yap1 protein, mouse; D011392:Proline