Enables hypoxanthine phosphoribosyltransferase activity. Involved in several processes, including cellular response to insulin stimulus; hypoxanthine metabolic process; and spermatogenesis. Predicted to be located in cytoplasm. Predicted to be active in cytosol. Biomarker of hepatocellular carcinoma. Human ortholog(s) of this gene implicated in HRPT-related hyperuricemia and Lesch-Nyhan syndrome. Orthologous to human HPRT1 (hypoxanthine phosphoribosyltransferase 1). [provided by Alliance of Genome Resources, Apr 2022]