FUNCTION: Functions as a RAC1 guanine nucleotide exchange factor (GEF), activating Rac proteins by exchanging bound GDP for free GTP. Its activity is synergistically activated by phosphatidylinositol 3,4,5-trisphosphate and the beta gamma subunits of heterotrimeric G protein. Mediates the activation...
                        FUNCTION: Functions as a RAC1 guanine nucleotide exchange factor (GEF), activating Rac proteins by exchanging bound GDP for free GTP. Its activity is synergistically activated by phosphatidylinositol 3,4,5-trisphosphate and the beta gamma subunits of heterotrimeric G protein. Mediates the activation of RAC1 in a PI3K-dependent manner. May be an important mediator of Rac signaling, acting directly downstream of both G protein-coupled receptors and phosphoinositide 3-kinase. {ECO:0000269|PubMed:15304342, ECO:0000269|PubMed:15304343, ECO:0000269|PubMed:15897194}.
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                        GO - Biological processes (BP): 
                        adult locomotory behavior [GO:0008344]; dendrite morphogenesis [GO:0048813]; G protein-coupled receptor signaling pathway [GO:0007186]; phosphatidylinositol 3-kinase signaling [GO:0014065]; regulation of small GTPase mediated signal transduction [GO:0051056]...
                        adult locomotory behavior [GO:0008344]; dendrite morphogenesis [GO:0048813]; G protein-coupled receptor signaling pathway [GO:0007186]; phosphatidylinositol 3-kinase signaling [GO:0014065]; regulation of small GTPase mediated signal transduction [GO:0051056]
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                        GO - Molecular function (MF): 
                        GTPase activator activity [GO:0005096]; guanyl-nucleotide exchange factor activity [GO:0005085]...
                        GTPase activator activity [GO:0005096]; guanyl-nucleotide exchange factor activity [GO:0005085]
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                        GO - Cellular component (CC): 
                        cytosol [GO:0005829]; plasma membrane [GO:0005886]...
                        cytosol [GO:0005829]; plasma membrane [GO:0005886]
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