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Description
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FUNCTION: Functions as a cell surface receptor and performs physiological functionson the surface of neurons relevant to neurite growth, neuronal adhesion andaxonogenesis. Involved in cell mobility and transcription regulation throughprotein-protein interactions. Can promote transcription activation through binding toAPBB1/Tip60 and inhibit Notch signaling through interaction with Numb. Couples toapoptosis-inducing pathways such as those mediated by G(O) and JIP. Inhibits G(o)alpha ATPase activity. Acts as a kinesin I membrane receptor, mediating the axonaltransport of beta-secretase and presenilin 1. May be involved in copperhomeostasis/oxidative stress through copper ion reduction. Can regulate neuriteoutgrowth through binding to components of the extracellular matrix such as heparinand collagen I and IV. FUNCTION: Beta-amyloid peptides are lipophilic metal chelatorswith metal-reducing activity. Bind transient metals such as copper, zinc and iron. Ratand mouse beta-amyloid peptides bind only weakly transient metals and have littlereducing activity due to substitutions of transient metal chelating residues. Beta-APP42may activate mononuclear phagocytes in the brain and elicit inflammatory responses.Promotes both tau aggregation and TPK II-mediated phosphorylation (By similarity).FUNCTION: The gamma-CTF peptides as well as the caspase-cleaved peptides,including C31, are potent enhancers of neuronal apoptosis. SUBUNIT: Binds, via itsC-terminus, to the PID domain of several cytoplasmic proteins, including APBB familymembers, the APBA family, MAPK8IP1, SHC1, Numb and Dab1. Binding to Dab1inhibits its serine phosphorylation. Also interacts with GPCR-like protein BPP, FPRL1,APPBP1, IB1, KNS2 (via its TPR domains), APPBP2 (via BaSS) and DDB1. In vitro, itbinds MAPT via the MT-binding domains. Associates with microtubules in the presenceof ATP and in a kinesin-dependent manner. Interacts, through a C-terminal domain, withGNAO1. Amyloid beta-42 binds CHRNA7 in hippocampal neurons. Beta-amyloidassociates with HADH2. TISSUE SPECIFICITY: different isoforms in different tissues:kidney. brain. liver. hippocampus, substania nigra pars compacta and cerebellum. In thecerebellum, all the isoforms are abundantly expressed in Purkinje cells. Alternate Names: anti-AAA antibody, anti-ABETA antibody, anti-ABPP antibody, anti-AD1 antibody,anti-APPI antibody, anti-CTFgamma antibody, anti-CVAP antibody, anti-PN2 antibody. Related Diseases: Other Neuronal
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