Predicted to enable several functions, including Y-form DNA binding activity; identical protein binding activity; and ubiquitin protein ligase binding activity. Acts upstream of or within several processes, including negative regulation of DNA recombination; response to UV; and spermatogenesis. Located in XY body; chromatin; and nucleus. Is expressed in adrenal medulla; dorsal root ganglion; testis; trunk mesenchyme derived from neural crest; and urinary system. Orthologous to human RAD18 (RAD18 E3 ubiquitin protein ligase). [provided by Alliance of Genome Resources, Apr 2022]