Predicted to enable identical protein binding activity and ribose phosphate diphosphokinase activity. Predicted to be involved in 5-phosphoribose 1-diphosphate biosynthetic process and purine nucleotide biosynthetic process. Predicted to act upstream of or within bone development. Part of ribose phosphate diphosphokinase complex. Orthologous to human PRPSAP2 (phosphoribosyl pyrophosphate synthetase associated protein 2). [provided by Alliance of Genome Resources, Apr 2022]