phosphoribosyltransferase

== English == === Etymology === From phosphoribosyl +‎ transferase. === Noun === phosphoribosyltransferase (plural phosphoribosyltransferases) (biochemistry) An enzyme that transfers a phosphoribosyl group from a donor molecule like phosphoribosyl pyrophosphate to an acceptor molecule, typically a purine or pyrimidine base. This process is important for the salvage pathways in nucleotide metabolism, helping cells recycle bases to create nucleotides.