Predicted to enable calcium ion binding activity; gluconolactonase activity; and zinc ion binding activity. Predicted to be involved in several processes, including L-ascorbic acid biosynthetic process; intracellular calcium ion homeostasis; and regulation of calcium-mediated signaling. Predicted to be located in cytoplasm and nucleus. Is expressed in intestine; kidney; and liver. Orthologous to human RGN (regucalcin).