Enables protein-lysine N-methyltransferase activity. Involved in protein methylation. Acts upstream of or within heterochromatin organization; peptidyl-lysine methylation; and regulation of histone H3-K9 methylation. Predicted to be located in chromosome and nucleolus. Is expressed in several structures, including alimentary system; genitourinary system; integumental system; musculature; and nervous system. Orthologous to human SETD7 (SET domain containing 7, histone lysine methyltransferase). [provided by Alliance of Genome Resources, Apr 2022]