Predicted to enable ribosylnicotinamide kinase activity and ribosylnicotinate kinase activity. Predicted to act upstream of or within phosphorylation and pyridine nucleotide biosynthetic process. Predicted to be active in cytoplasm. Is expressed in cochlea; ear; inner ear; nervous system; and vestibulo-cochlear ganglion. Orthologous to human NMRK1 (nicotinamide riboside kinase 1). [provided by Alliance of Genome Resources, Apr 2022]