Predicted to enable several functions, including identical protein binding activity; kinase binding activity; and ribose phosphate diphosphokinase activity. Predicted to be involved in 5-phosphoribose 1-diphosphate biosynthetic process; negative regulation of kinase activity; and purine nucleotide biosynthetic process. Predicted to act upstream of or within nucleotide biosynthetic process. Predicted to be part of ribose phosphate diphosphokinase complex. Predicted to be active in cytoplasm. Orthologous to human PRPSAP1 (phosphoribosyl pyrophosphate synthetase associated protein 1). [provided by Alliance of Genome Resources, Apr 2022]