Seems to play a role in the regulation of RhoA GTPase by guanine nucleotide-binding alpha-12 (GNA12) and alpha-13 (GNA13) subunits. Acts as GTPase-activating protein (GAP) for GNA12 and GNA13, and as guanine nucleotide exchange factor (GEF) for RhoA GTPase. Activated G alpha 13/GNA13 stimulates the RhoGEF activity through interaction with the RGS-like domain. This GEF activity is inhibited by binding to activated GNA12. Mediates angiotensin-2-induced RhoA activation. Isoform 3 and isoform 4 do not homooligomerize and show an enhanced RhoGEF activity.
Specificity
Natural and recombinant Mouse Rho guanine nucleotide exchange factor 1
Subcellular Location
Cytoplasm Membrane Translocated to the membrane by activated GNA13 or LPA stimulation.
Interacts with RHOA, GNA12 and GNA13 (By similarity). Homooligomerizes through the coiled coil region. Interacts with CTNNAL1 (By similarity). May interact with CCPG1.