Enables IMP cyclohydrolase activity and phosphoribosylaminoimidazolecarboxamide formyltransferase activity. Involved in several processes, including animal organ development; folic acid-containing compound metabolic process; and nucleobase-containing small molecule metabolic process. Predicted to be located in plasma membrane. Predicted to be active in cytosol. Human ortholog(s) of this gene implicated in purine-pyrimidine metabolic disorder. Orthologous to human ATIC (5-aminoimidazole-4-carboxamide ribonucleotide formyltransferase/IMP cyclohydrolase). [provided by Alliance of Genome Resources, Apr 2022]