Enables histone methyltransferase binding activity. Involved in negative regulation of single stranded viral RNA replication via double stranded DNA intermediate and positive regulation of DNA methylation-dependent heterochromatin assembly. Acts upstream of or within response to bacterium. Located in nucleus. Part of gamma-tubulin complex. Is expressed in limb; reproductive system; somite; and urinary system. Orthologous to human RESF1 (retroelement silencing factor 1). [provided by Alliance of Genome Resources, Apr 2022]