Enables chromatin binding activity and methylated histone binding activity. Involved in regulatory ncRNA-mediated post-transcriptional gene silencing. Located in condensed chromosome and nucleus. Expressed in several structures, including germ line; intestine; oocyte; pharynx; and seam cell. Human ortholog(s) of this gene implicated in acute monocytic leukemia and acute myeloid leukemia. Is an ortholog of human MLLT10 (MLLT10 histone lysine methyltransferase DOT1L cofactor) and MLLT6 (MLLT6, PHD finger containing).