Recombinant Human Ras GTPase-activating protein 4 (RASA4), Truncated

Uniprot Id

O43374

Target Species

Human

Target Name

RASA4

Target Full Name

Ras GTPase-activating protein 4

Target Function

Ca(2+)-dependent Ras GTPase-activating protein, that switches off the Ras-MAPK pathway following a stimulus that elevates intracellular calcium. Functions as an adaptor for Cdc42 and Rac1 during FcR-mediated phagocytosis.

Target Subcellular Location

Cytoplasm, cytosol. Cell membrane; Peripheral membrane protein. Note=Localized to the cytosol as a result of its lack of phosphoinositide binding activity. Upon agonist-stimulated calcium mobilization, utilizes the C2A and C2B domains to associate with the plasma membrane.

Target Tissue Specificity

Widely expressed.

Target Synonyms

RASA4; CAPRI; GAPL; KIAA0538; Ras GTPase-activating protein 4; Calcium-promoted Ras inactivator; Ras p21 protein activator 4; RasGAP-activating-like protein 2

Target Background

This gene encodes a member of the GAP1 family of GTPase-activating proteins that suppresses the Ras/mitogen-activated protein kinase pathway in response to Ca(2+). Stimuli that increase intracellular Ca(2+) levels result in the translocation of this protein to the plasma membrane, where it activates Ras GTPase activity. Consequently, Ras is converted from the active GTP-bound state to the inactive GDP-bound state and no longer activates downstream pathways that regulate gene expression, cell growth, and differentiation. Multiple transcript variants encoding different isoforms have been found for this gene.