Highly expressed in spleen, lymph nodes, lung and placenta. Expressed at moderate level in thymus, kidney, heart and digestive tract. Weakly expressed in other lymphoid tissues. Detected in T-cells. Belongs to the TRAFAC class TrmE-Era-EngA-EngB-Septin-like GTPase superfamily. AIG1/Toc34/Toc159-like paraseptin GTPase family. IAN subfamily.