Predicted to enable identical protein binding activity. Predicted to be involved in DNA replication initiation; mitotic G2/M transition checkpoint; and response to ionizing radiation. Predicted to act upstream of or within reciprocal meiotic recombination. Located in condensed nuclear chromosome and male germ cell nucleus. Is expressed in embryo and metanephros. Orthologous to human TOPBP1 (DNA topoisomerase II binding protein 1). [provided by Alliance of Genome Resources, Apr 2022]