The dimer has GTPase activity; the active site contains residues from both subunits.
Subcellular locations: Lipid droplet, Cytoplasm, Endoplasmic reticulum, Golgi apparatus
Colocalizes with GIMAP2 on the surface of cytoplasmic lipid droplets.
Most abundantly expressed in spleen, lymph nodes, and fetal kidney, but also present in the heart and the small intestine. Lower expression levels are found in lung, kidney, liver, and thyroid, salivary, and mammary glands. Also detected in the thymus . Detected in T-cells .