In enzymology, an imidazoleacetate—phosphoribosyldiphosphate ligase (EC 6.3.4.8) is an enzyme that catalyzes a chemical reaction
ATP + imidazole-4-acetate + 5-phosphoribosyl diphosphate ⇌ {\displaystyle \rightleftharpoons } ADP + phosphate + 1-(5-phosphoribosyl)imidazole-4-acetate + diphosphate The 3 substrates of this enzyme are ATP, imidazole-4-acetate, and 5-phosphoribosyl diphosphate, whereas its 4 products are ADP, phosphate, 1-(5-phosphoribosyl)imidazole-4-acetate, and diphosphate. This enzyme belongs to the family of ligases, specifically those forming generic carbon-nitrogen bonds. The systematic name of this enzyme class is imidazoleacetate:5-phosphoribosyl-diphosphate ligase (ADP- and diphosphate-forming). This enzyme is also called 5-phosphoribosylimidazoleacetate synthetase. This enzyme participates in histidine metabolism.
References
Crowley GM (August 1964). "The enzymatic synthesis of 5'-phosphoribosylimidazoleacetic acid". The Journal of Biological Chemistry. 239 (8): 2593–601. doi:10.1016/S0021-9258(18)93892-5. PMID 14235540.
