GRB2 Associated Binding Protein 1 (GAB1) Antibody – Rabbit Polyclonal

The protein encoded by this gene is a member of the IRS1-like multisubstrate docking protein family. It is an important mediator of branching tubulogenesis and plays a central role in cellular growth response, transformation and apoptosis. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2008]

GAB1: Adapter protein that plays a role in intracellular signaling cascades triggered by activated receptor-type kinases. Plays a role in FGFR1 signaling. Probably involved in signaling by the epidermal growth factor receptor (EGFR) and the insulin receptor (INSR). Interacts with GRB2 and with other SH2-containing proteins. Interacts with phosphorylated LAT2. Interacts with PTPRJ. Identified in a complex containing FRS2, GRB2, GAB1, PIK3R1 and SOS1. Interacts (phosphorylated) with PTPN11. Interacts with HCK. Belongs to the GAB family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Adaptor/scaffold; Motility/polarity/chemotaxis

Chromosomal Location of Human Ortholog: 4q31.21

Cellular Component: cytosol

Molecular Function: 1-phosphatidylinositol-3-kinase activity; phosphatidylinositol-4,5-bisphosphate 3-kinase activity; protein binding; SH3/SH2 adaptor activity

Biological Process: cell proliferation; epidermal growth factor receptor signaling pathway; insulin receptor signaling pathway; phosphoinositide-mediated signaling; regulation of phosphoinositide 3-kinase cascade