β-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 (Y682ENPTY687) that, when phosphorylated on Tyr682, 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.
Tyrosine Phosphorylation of the β-Amyloid Precursor Protein Cytoplasmic Tail Promotes Interaction with Shc*
P. Tarr,R. Roncarati,G. Pelicci,P. Pelicci,L. D’Adamio
Published 2002 in Journal of Biological Chemistry
ABSTRACT
PUBLICATION RECORD
- Publication year
2002
- Venue
Journal of Biological Chemistry
- Publication date
2002-05-10
- Fields of study
Biology, Medicine
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
CITATION MAP
EXTRACTION MAP
CLAIMS
CONCEPTS
- app cytoplasmic tail
The intracellular C-terminal region of APP that contains the binding site tested for PTB-domain interactions.
Aliases: cytoplasmic tail of APP
- shc a
An Shc family adapter protein isoform with a PTB domain that participates in signaling to differentiation and survival pathways.
Aliases: ShcA
- shc c
An Shc family adapter protein isoform with a PTB domain that participates in signaling to differentiation and survival pathways.
Aliases: ShcC
- tyrosine phosphorylation of app
Phosphorylation of APP on tyrosine residues, especially Tyr682, that is evaluated as a binding-relevant state.
Aliases: phosphorylated APP, APP phosphorylation on Tyr682
- y682enpty687 ptb-binding motif
A tyrosine-centered sequence in the APP cytoplasmic tail that serves as a PTB-domain binding site.
Aliases: Y682ENPTY687, ENPTY motif, Tyr682-containing motif
- β-amyloid precursor protein (app)
A widely expressed transmembrane precursor protein whose cytoplasmic tail is examined here for interactions with PTB-domain adapter proteins.
Aliases: APP, beta-amyloid precursor protein
REFERENCES
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