Description
Product Characteristics:
Heterotrimeric G protein-mediated signal transduction is a dynamically regulated process with the intensity of signal decreasing over time despite the continued presence of the agonist (1,2). G protein-coupled receptor kinases (GRKs) are activated by activated G protein-coupled receptors, and they function to phosphorylate and inactivate cell surface receptors in the heterotrimeric G protein signaling cascade (3,4). GIT1 (for GRK-interactor 1) and GIT2 are GTPase-activating proteins (GAP) for members of the ADP ribosylation factor (ARF) family of small GTP-binding proteins, which are involved in vesicular trafficking (5,6). GIT1 overexpression results in reduced internalization and resensitization of b2-adrenergic receptor, thus reducing b2-adrenergic receptor signaling (5).
Subcellular location: Nucleus
Synonyms: ARF GAP GIT2, ARF GTPase activating protein GIT2, ARF GTPase-activating protein GIT2, CAT 2, CAT-2, CAT2, Cool associated tyrosine phosphorylated protein 2, Cool interacting tyrosine phosphorylated protein 2, Cool-interacting tyrosine-phosphorylated protein 2, DKFZp686G01261, G protein coupled receptor kinase interacting ArfGAP 2, G protein coupled receptor kinase interactor 2, G protein-coupled receptor kinase-interactor 2, GIT 2, GIT2, GIT2_HUMAN, GRK interacting protein 2, GRK-interacting protein 2, KIAA0148, MGC760, ARF GTPase-activating protein GIT2, Cool-interacting tyrosine-phosphorylated protein 2, G protein-coupled receptor kinase-interactor 2.
Target Information: This gene encodes a member of the GIT protein family, which interact with G protein-coupled receptor kinases and possess ADP-ribosylation factor (ARF) GTPase-activating protein (GAP) activity. GIT proteins traffic between cytoplasmic complexes, focal adhesions, and the cell periphery, and interact with Pak interacting exchange factor beta (PIX) to form large oligomeric complexes that transiently recruit other proteins. GIT proteins regulate cytoskeletal dynamics and participate in receptor internalization and membrane trafficking. This gene has been shown to repress lamellipodial extension and focal adhesion turnover, and is thought to regulate cell motility. This gene undergoes extensive alternative splicing to generate multiple isoforms, but the full-length nature of some of these variants has not been determined. The various isoforms have functional differences, with respect to ARF GAP activity and to G protein-coupled receptor kinase 2 binding. [provided by RefSeq, Sep 2008]