Metabolisms of Nucleosides in Bacteria

Part II. Studies on Nucleoside-N-Ribosyl Group Transfer Reaction in Bacteria (l)

抄録

The bacterial enzymes which catalyze the nucleoside-N-ribosyl group transfer reaction between pyrimidine and purine nucleoside were studied. It was found that some bacteria had the intracellular enzyme system which catalyzes the nucleoside-N-ribosyl group transfer and could produce purine nucleosides from purine bases and pyrimidine nucleosides. Using the cell-free extract of Erwinia carotovora, inosine was isolated in fine crystals from uridine and hypoxanthine through the nucleoside-N-ribosyl transfer reaction.
It seemed that the bacteria which can transfer the N-ribosyl group may be divided into two groups, based on the pH dependency of this reaction. This reaction was stimu-lated by inorganic phosphate.