Enables several functions, including frizzled binding activity; protein C-terminus binding activity; and protein homodimerization activity. Acts upstream of or within spermatid nucleus differentiation. Located in Golgi apparatus; plasma membrane; and synapse. Is expressed in genitourinary system and tongue. Used to study azoospermia. Orthologous to human GOPC (golgi associated PDZ and coiled-coil motif containing). [provided by Alliance of Genome Resources, Apr 2022]