Enables diphosphoinositol-pentakisphosphate kinase activity and inositol hexakisphosphate kinase activity. Predicted to be involved in inositol metabolic process and inositol phosphate biosynthetic process. Predicted to act upstream of or within sensory perception of sound. Predicted to be located in cytoplasm. Predicted to be active in cytosol. Is expressed in several structures, including alimentary system; genitourinary system; nervous system; sensory organ; and skin. Used to study nonsyndromic deafness. Human ortholog(s) of this gene implicated in autosomal recessive nonsyndromic deafness 100. Orthologous to human PPIP5K2 (diphosphoinositol pentakisphosphate kinase 2). [provided by Alliance of Genome Resources, Apr 2022]