The function of ENSG00000130988 (RGN, regucalcin) is as follows. Gluconolactonase with low activity towards other sugar lactones, including gulonolactone and galactonolactone. Can also hydrolyze diisopropyl phosphorofluoridate and phenylacetate (in vitro). Calcium-binding protein. Modulates Ca(2+) signaling, and Ca(2+)- dependent cellular processes and enzyme activities (By similarity). .