DAB2 Antibody – Mouse Monoclonal

This gene encodes a mitogen-responsive phosphoprotein. It is expressed in normal ovarian epithelial cells, but is down-regulated or absent from ovarian carcinoma cell lines, suggesting its role as a tumor suppressor. This protein binds to the SH3 domains of GRB2, an adaptor protein that couples tyrosine kinase receptors to SOS (a guanine nucleotide exchange factor for Ras), via its C-terminal proline-rich sequences, and may thus modulate growth factor/Ras pathways by competing with SOS for binding to GRB2. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2011]

DAB2: an adaptor protein that interacts with Grb2, myosin VI, SMAD2/3, DIP1/2, Dvl-3, the integrin betasubunit, and c-Src. Negatively regulates canonical Wnt signaling by stabilizing the beta-catenin degradation complex. A component of the CSF-1 signal transduction pathway. Phosphorylated DAB2 inhibits adhesion and integrin signaling. Two alternatively spliced isoforms are described.

Protein type: Adaptor/scaffold; Tumor suppressor

Chromosomal Location of Human Ortholog: 5p13.1

Cellular Component: focal adhesion; clathrin-coated vesicle; intracellular membrane-bound organelle; lysosomal membrane; apical plasma membrane; nucleolus; plasma membrane; clathrin coated vesicle membrane; coated pit; clathrin coat of coated pit

Molecular Function: protein C-terminus binding; integrin binding; protein binding; phosphatidylinositol-4,5-bisphosphate binding; SMAD binding

Biological Process: cellular morphogenesis during differentiation; pinocytosis; apoptosis; positive regulation of transcription, DNA-dependent; positive regulation of endocytosis; excretion; activation of JNK activity; clathrin cage assembly; protein transport; positive regulation of RNA elongation from RNA polymerase II promoter; negative regulation of protein binding; positive regulation of receptor recycling; integrin-mediated signaling pathway; receptor-mediated endocytosis; Wnt receptor signaling pathway; in utero embryonic development; leading edge cell differentiation; positive regulation of transforming growth factor beta receptor signaling pathway; cell proliferation; positive regulation of proteasomal ubiquitin-dependent protein catabolic process; myeloid cell differentiation; positive regulation of protein amino acid phosphorylation; negative regulation of transcription, DNA-dependent; positive regulation of cell migration; endoderm development; negative regulation of apoptosis