APPL1 Antibody

3276:

Western Blotting

APPL1 Antibody detects endogenous levels of total APPL1 protein.

Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding residue surrounding Ala672 of human APPL1. Antibodies are purified by peptide affinity chromatography.

Western Blotting

Western blot analysis of extracts from HEK293, A20 and PC12 cells using APPL1 Antibody.

The APPL1 multidomain adaptor protein is a BAR-domain protein family member that is involved in membrane trafficking within a number of signal transduction pathways (1). The amino-terminal BAR domain mediates the formation of crescent-shaped APPL1 homodimers (or APPL1 and APPL2 heterodimers) important to lipid binding and membrane curvature sensing (1). The PH domain of APPL1 is required for binding of the adaptor protein to Rab5 GTPase (2). In response to extracellular stimuli, Rab5 GTP hydrolysis releases APPL1 from the endosome and allows translocation of APPL1 to the nucleus where it joins a protein complex that controls chromatin remodeling and gene expression (3). The carboxy-terminal PTB domain of APPL1 enables an interaction between APPL1 and the TrkA neurotrophin receptor. An association between these two proteins and the TrkA-interacting protein GIPC1 within endosomes is required for nerve growth factor mediated signaling (4). APPL1 also binds follicle-stimulating hormone (FSH) receptors, which may provide a relay of FSH signaling to the PI3K/Akt pathway (5). The APPL1 adaptor protein is implicated in insulin signaling, as interaction between APPL1 and Akt2 is required for insulin-stimulated translocation of GLUT4 receptor proteins. Both induced overexpression and knockdown of APPL1 inhibit insulin-stimulated GLUT4 translocation (6). APPL1 binds the adiponectin receptor and acts as a downstream effector in the adiponectin pathway to mediate NO production (7,8). APPL1 interacts with DCC (deleted in colorectal cancer) protein and may play a role in DCC-induced apoptosis (9).

1. Habermann, B. (2004) EMBO Rep 5, 250-5.
2. Zhu, G. et al. (2007) EMBO J 26, 3484-93.
3. Miaczynska, M. et al. (2004) Cell 116, 445-56.
4. Lin, D.C. et al. (2006) Mol Cell Biol 26, 8928-41.
5. Nechamen, C.A. et al. (2004) Biol Reprod 71, 629-36.
6. Saito, T. et al. (2007) J Biol Chem 282, 32280-7.
7. Mao, X. et al. (2006) Nat Cell Biol 8, 516-23.
8. Cheng, K.K. et al. (2007) Diabetes 56, 1387-94.
9. Liu, J. et al. (2002) J Biol Chem 277, 26281-5.

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For Research Use Only. Not For Use In Diagnostic Procedures.