The function of NT5E (5'-nucleotidase ecto, Ensembl gene identifier ENSG00000135318) is as follows. Catalyzes the hydrolysis of nucleotide monophosphates, releasing inorganic phosphate and the corresponding nucleoside, with AMP being the preferred substrate (PubMed:21933152, PubMed:22997138, PubMed:23142347, PubMed:24887587, PubMed:34403084). Shows a preference for ribonucleotide monophosphates over their equivalent deoxyribose forms (PubMed:34403084). Other substrates include IMP, UMP, GMP, CMP, dAMP, dCMP, dTMP, NAD and NMN (PubMed:21933152, PubMed:22997138, PubMed:23142347, PubMed:24887587, PubMed:34403084). {ECO:0000269|PubMed:21933152, ECO:0000269|PubMed:22997138, ECO:0000269|PubMed:23142347, ECO:0000269|PubMed:24887587, ECO:0000269|PubMed:34403084}.