title: Tyrosine phosphorylation of the beta-amyloid precursor protein cytoplasmic tail promotes interaction with Shc.
abstract: beta-Amyloid precursor protein (APP) is a widely expressed transmembrane protein of unknown function that is involved in the pathogenesis of Alzheimer's disease. The cytoplasmic tail of APP interacts with phosphotyrosine binding (PTB) domain containing proteins (Fe65, X11, mDab-1, and JIP-1) and may modulate gene expression and apoptosis. We now identify Shc A and Shc C, PTB-containing adapter proteins that signal to cellular differentiation and survival pathways, as novel APP-interacting proteins. The APP cytoplasmic tail contains a PTB-binding motif (Y(682)ENPTY(687)) that, when phosphorylated on Tyr(682), precipitated the PTB domain of Shc A and Shc C, as well as endogenous full-length Shc A. APP and Shc C were physically associated in adult mouse brain homogenates. Increase in phosphorylation of APP by overexpression of the nerve growth factor receptor Trk A in 293T cells promoted the interaction of transfected APP and endogenous Shc A. Pervanadate treatment of N2a neuroblastoma cells resulted in tyrosine phosphorylation and association of endogenous APP and Shc A. Thus, APP and Shc proteins interact in vitro, in cells, and in the mouse brain. Tyrosine phosphorylation of APP may promote the interaction with Shc proteins.
authors.affiliation: Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, New York 10461, USA.
authors.forename: Philip E
authors.initials: PE
authors.lastname: Tarr
authors.forename: Roberta
authors.initials: R
authors.lastname: Roncarati
authors.forename: Giuliana
authors.initials: G
authors.lastname: Pelicci
authors.forename: Pier Giuseppe
authors.initials: PG
authors.lastname: Pelicci
authors.forename: Luciano
authors.initials: L
authors.lastname: D'Adamio
mesh_terms: D048868:Adaptor Proteins, Signal Transducing; D033942:Adaptor Proteins, Vesicular Transport; D020816:Amino Acid Motifs; D016564:Amyloid beta-Protein Precursor / Q000378:metabolism*; D000818:Animals; D017209:Apoptosis; D001665:Binding Sites; D001921:Brain / Q000378:metabolism; D019556:COS Cells; D002454:Cell Differentiation; D002460:Cell Line; D002462:Cell Membrane / Q000378:metabolism; D003593:Cytoplasm / Q000378:metabolism; D004791:Enzyme Inhibitors / Q000494:pharmacology; D005982:Glutathione Transferase / Q000378:metabolism; D006801:Humans; D015151:Immunoblotting; D051379:Mice; D008807:Mice, Inbred BALB C; D008954:Models, Biological; D009419:Nerve Tissue Proteins / Q000378:metabolism; D009447:Neuroblastoma / Q000378:metabolism; D009479:Neuropeptides; D010766:Phosphorylation; D011233:Precipitin Tests; D011485:Protein Binding; D014176:Protein Biosynthesis; D017434:Protein Structure, Tertiary; D011506:Proteins / Q000378:metabolism*; D020917:Receptor, trkA; D011993:Recombinant Fusion Proteins / Q000378:metabolism; D055765:Shc Signaling Adaptor Proteins; D000071425:Src Homology 2 Domain-Containing, Transforming Protein 1; D000071427:Src Homology 2 Domain-Containing, Transforming Protein 3; D014158:Transcription, Genetic; D014443:Tyrosine / Q000378:metabolism*; D014638:Vanadates / Q000494:pharmacology
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D033942:Adaptor Proteins, Vesicular Transport; D016564:Amyloid beta-Protein Precursor; D004791:Enzyme Inhibitors; D009419:Nerve Tissue Proteins; D009479:Neuropeptides; D011506:Proteins; D011993:Recombinant Fusion Proteins; C528024:SHC1 protein, human; C122029:SHC3 protein, human; D055765:Shc Signaling Adaptor Proteins; C528034:Shc1 protein, mouse; C485682:Shc3 protein, mouse; D000071425:Src Homology 2 Domain-Containing, Transforming Protein 1; D000071427:Src Homology 2 Domain-Containing, Transforming Protein 3; C076715:pervanadate; D014638:Vanadates; D014443:Tyrosine; D005982:Glutathione Transferase; D020917:Receptor, trkA