Predicted to enable histone H4K20 methyltransferase activity. Predicted to be involved in negative regulation of gene expression, epigenetic. Predicted to be located in chromatin. Is expressed in anterior midgut primordium; embryonic/larval midgut; larval muscle system; organism; and posterior midgut primordium. Orthologous to human SMYD5 (SMYD family member 5).