title: Phosphotyrosine-independent binding of SHC to the NPLH sequence of murine protein-tyrosine phosphatase-PEST. Evidence for extended phosphotyrosine binding/phosphotyrosine interaction domain recognition specificity.
abstract: The phosphotyrosine binding (PTB) or phosphotyrosine interaction (PI) domain of the proto-oncoprotein p52SHC binds to an NPXpY consensus sequence found in several growth factor receptors (Kavanaugh, W. M., Turck, C. W., and Williams, L. T. (1994) Science 268, 1177-1179). The amino-terminal region of p52SHC, which includes the PTB/PI domain, has been previously shown to associate with protein-tyrosine phosphatase-PEST (PTP-PEST) in vivo (Habib, T. , Herrera, R., and Decker, S. J. (1994) J. Biol. Chem. 269, 25243-25246). We report here the detailed mapping of this interaction in a murine context using glutathione S-transferase fusion protein binding studies and peptide competition assays. We show that the interaction between murine SHC and murine PTP-PEST is mediated through the PTB/PI domain of murine SHC and an NPLH sequence found in the carboxyl terminus of murine PTP-PEST. Since this interaction is not dependent on the presence of a tyrosine-phosphorylated residue in the target sequence, this reveals that the PTB/PI domain of SHC can recognize both tyrosine-phosphorylated sequences and non-tyrosine-based recognition motifs.
authors.affiliation: Department of Biochemistry, McGill University, Montreal, Quebec H3G 1Y6, Canada.
authors.forename: A
authors.initials: A
authors.lastname: Charest
authors.forename: J
authors.initials: J
authors.lastname: Wagner
authors.forename: S
authors.initials: S
authors.lastname: Jacob
authors.forename: C J
authors.initials: CJ
authors.lastname: McGlade
authors.forename: M L
authors.initials: ML
authors.lastname: Tremblay
mesh_terms: D048868:Adaptor Proteins, Signal Transducing; D033942:Adaptor Proteins, Vesicular Transport; D000595:Amino Acid Sequence; D000818:Animals; D006639:Histidine / Q000737:chemistry; D051379:Mice; D008969:Molecular Sequence Data; D010455:Peptides / Q000737:chemistry; D019000:Phosphotyrosine / Q000737:chemistry; D011485:Protein Binding; D054594:Protein Tyrosine Phosphatase, Non-Receptor Type 12; D017027:Protein Tyrosine Phosphatases / Q000378:metabolism*; D011506:Proteins / Q000378:metabolism*; D011994:Recombinant Proteins; D055765:Shc Signaling Adaptor Proteins; D000071425:Src Homology 2 Domain-Containing, Transforming Protein 1; D013329:Structure-Activity Relationship
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D033942:Adaptor Proteins, Vesicular Transport; D010455:Peptides; D011506:Proteins; D011994:Recombinant Proteins; D055765:Shc Signaling Adaptor Proteins; C528034:Shc1 protein, mouse; D000071425:Src Homology 2 Domain-Containing, Transforming Protein 1; D019000:Phosphotyrosine; D006639:Histidine; D054594:Protein Tyrosine Phosphatase, Non-Receptor Type 12; D017027:Protein Tyrosine Phosphatases; C516739:Ptpn12 protein, mouse