Enables endoribonuclease activity and ribosome binding activity. Involved in RNA phosphodiester bond hydrolysis, endonucleolytic; mRNA catabolic process; and rRNA catabolic process. Located in nucleus. Human ortholog(s) of this gene implicated in platelet-type bleeding disorder 20. Orthologous to human SLFN14 (schlafen family member 14). [provided by Alliance of Genome Resources, Apr 2022]