title: High resolution crystal structures of the p120 RasGAP SH3 domain.
abstract: X-ray structures of two crystal forms of the Src homology 3 domain (SH3) of the Ras GTPase activating protein (RasGAP) were determined at 1.5 and 1.8A resolution. The overall structure comprises a single domain with two tightly packed beta-sheets linked by a short helical segment. An important motif for peptide binding in other SH3 domains is not conserved in RasGAP. The RasGAP SH3 domain forms dimers in the crystal structures, which may provide new functional insight. The dimer interface involves residues also present in a peptide previously identified as an apoptotic sensitizer of tumor cells.
authors.affiliation: Biostructural Research, Department of Medicinal Chemistry, The Danish University of Pharmaceutical Sciences, Universitetsparken 2, DK-2100 Copenhagen, Denmark.
authors.forename: Birthe
authors.initials: B
authors.lastname: Ross
authors.forename: Ole
authors.initials: O
authors.lastname: Kristensen
authors.forename: Dimitri
authors.initials: D
authors.lastname: Favre
authors.forename: Joël
authors.initials: J
authors.lastname: Walicki
authors.forename: Jette S
authors.initials: JS
authors.lastname: Kastrup
authors.forename: Christian
authors.initials: C
authors.lastname: Widmann
authors.forename: Michael
authors.initials: M
authors.lastname: Gajhede
mesh_terms: D000595:Amino Acid Sequence; D001665:Binding Sites; D003198:Computer Simulation; D003461:Crystallography; D019281:Dimerization; D008956:Models, Chemical; D008958:Models, Molecular; D008969:Molecular Sequence Data; D011485:Protein Binding; D011487:Protein Conformation; D020729:p120 GTPase Activating Protein / Q000737:chemistry* / Q000648:ultrastructure*; D018909:src Homology Domains
chemical_list: D020729:p120 GTPase Activating Protein