Enables calcium ion binding activity and gluconolactonase activity. Involved in several processes, including negative regulation of nitrogen compound metabolic process; positive regulation of hydrolase activity; and positive regulation of lipid biosynthetic process. Located in cytosol and nucleus. Used to study familial hyperlipidemia. Biomarker of hepatocellular carcinoma. Orthologous to human RGN (regucalcin). [provided by Alliance of Genome Resources, Apr 2022]