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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.
AA793972; AW112107; BB079060; Ca2+promoted Ras inactivator; Ca2+-promoted Ras inactivator; calcium-promoted RAS inactivator; Capri; GAPL; Kiaa0538; Ras GTPase-activating protein 4; RAS p21 protein activator 4; RASA4; RasGAP-activating-like protein 2; RGD1565457
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