Predicted to enable protein serine/threonine kinase activity. Involved in positive regulation of histone H3-K9 methylation. Predicted to be located in cytoplasm and nucleus. Expressed in germline blastomere. Human ortholog(s) of this gene implicated in several diseases, including Li-Fraumeni syndrome 2; breast cancer (multiple); and germ cell cancer (multiple). Is an ortholog of human CHEK2 (checkpoint kinase 2).