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| ATP Phosphoribosyltransferase Phosphoribosyl-ATP Pyrophosphorylase | Phosphoribosyl ATP Pyrophosphorylase | Phosphoribosyltransferase, ATP | Pyrophosphorylase, Phosphoribosyl-ATP An enzyme that catalyzes the first step of the pathway for histidine biosynthesis in Salmonella typhimurium. ATP reacts reversibly with 5-phosphoribosyl-1-pyrophosphate to yield N-1-(5'-phosphoribosyl)-ATP and pyrophosphate. EC 2.4.2.17. |