Enables chromatin binding activity and ubiquitin protein ligase activity. Involved in germ cell development and histone H2A-K119 monoubiquitination. Acts upstream of or within with a negative effect on gene expression. Acts upstream of or within several processes, including gastrulation with mouth forming second; histone ubiquitination; and negative regulation of transcription by RNA polymerase II. Located in euchromatin; nuclear body; and sex chromatin. Part of PcG protein complex and ubiquitin ligase complex. Is expressed in several structures, including central nervous system; limb; ovary; retina; and urinary system. Orthologous to human RNF2 (ring finger protein 2). [provided by Alliance of Genome Resources, Apr 2022]