Predicted to enable nucleoside diphosphate kinase activity. Predicted to be involved in several processes, including nucleoside phosphate metabolic process; regulation of ATP biosynthetic process; and regulation of oxidative phosphorylation. Predicted to act upstream of or within phosphorylation. Located in mitochondrial matrix. Is expressed in several structures, including alimentary system; genitourinary system; nervous system; respiratory system; and sensory organ. Orthologous to human AK4 (adenylate kinase 4). [provided by Alliance of Genome Resources, Apr 2022]