Predicted to enable spermine synthase activity. Acts upstream of or within spermine metabolic process. Is expressed in several structures, including central nervous system; ganglia; limb; respiratory system; and tooth. Human ortholog(s) of this gene implicated in syndromic X-linked intellectual disability Snyder type. Orthologous to human SMS (spermine synthase). [provided by Alliance of Genome Resources, Apr 2022]