Predicted to enable orotate phosphoribosyltransferase activity and orotidine-5'-phosphate decarboxylase activity. Predicted to be involved in 'de novo' UMP biosynthetic process and 'de novo' pyrimidine nucleobase biosynthetic process. Is an ortholog of C. elegans umps-1. In C. elegans, umps-1 is involved in several processes, including determination of adult lifespan; pyrimidine-containing compound biosynthetic process; and response to radiation.