Enables identical protein binding activity and ubiquitin protein ligase binding activity. Acts upstream of or within several processes, including double-strand break repair; embryo implantation; and gamete generation. Located in nucleolus and perinuclear region of cytoplasm. Is expressed in brain; early conceptus; eye; gonad; and metanephros. Orthologous to human GGN (gametogenetin). [provided by Alliance of Genome Resources, Apr 2022]