Enables identical protein binding activity. Predicted to be involved in double-strand break repair. Predicted to be located in PML body and cytoplasm. Expressed in embryonic cell; somatic cell; and spermatheca. Human ortholog(s) of this gene implicated in autosomal recessive spinocerebellar ataxia 23. Is an ortholog of human TDP2 (tyrosyl-DNA phosphodiesterase 2).