Expressed in pollen grains. Expressed at the late stage of silique development. Down-regulated by aphid infection, 2-aminoethoxyvinylglycine (AVG), high CO(2), isoxaben, and propiconazole treatments. Up-regulated by brassinolides. Belongs to the TRAFAC class TrmE-Era-EngA-EngB-Septin-like GTPase superfamily. AIG1/Toc34/Toc159-like paraseptin GTPase family. IAN subfamily.