Predicted to enable several functions, including GTP binding activity; GTPase activity; and magnesium ion binding activity. Involved in flagellated sperm motility; neuron migration; and spermatid differentiation. Acts upstream of or within brain development; sperm capacitation; and sperm mitochondrion organization. Located in several cellular components, including dendrite; perikaryon; and sperm annulus. Part of septin complex. Is expressed in several structures, including central nervous system; olfactory epithelium; and retina. Orthologous to human SEPTIN4 (septin 4). [provided by Alliance of Genome Resources, Apr 2022]