Enables 5'-nucleotidase activity. Involved in AMP catabolic process and allantoin metabolic process. Acts upstream of or within nucleoside metabolic process. Is active in cytosol. Is expressed in several structures, including genitourinary system; gut; and skin. Orthologous to several human genes including NT5C1B-RDH14 (NT5C1B-RDH14 readthrough). [provided by Alliance of Genome Resources, Apr 2022]