Enables histone methyltransferase activity (H3-K4 specific). Involved in several processes, including histone H3-K4 methylation; positive regulation of cytokine production; and regulation of cell proliferation in bone marrow. Predicted to be located in cytosol and nucleus. Is expressed in several structures, including alimentary system; genitourinary system; heart; nervous system; and sensory organ. Orthologous to human SETD4 (SET domain containing 4). [provided by Alliance of Genome Resources, Apr 2022]