The function of ENSG00000154027 (AK5, adenylate kinase 5) is as follows. Nucleoside monophosphate (NMP) kinase that catalyzes the reversible transfer of the terminal phosphate group between nucleoside triphosphates and monophosphates. Active on AMP and dAMP with ATP as a donor. When GTP is used as phosphate donor, the enzyme phosphorylates AMP, CMP, and to a small extent dCMP. Also displays broad nucleoside diphosphate kinase activity. {ECO:0000269|PubMed:19647735, ECO:0000269|PubMed:23416111}.