Enables protein N-terminus binding activity. Predicted to be involved in several processes, including gamete generation; lens development in camera-type eye; and piRNA metabolic process. Predicted to act upstream of or within germ cell development. Located in mitochondrial matrix. Human ortholog(s) of this gene implicated in cataract 36. Orthologous to human TDRD7 (tudor domain containing 7). [provided by Alliance of Genome Resources, Apr 2022]