Adenylosuccinate lyase

An enzyme that, in the course of purine ribonucleotide biosynthesis, catalyzes the conversion of 5′-phosphoribosyl-4-(N-succinocarboxamide)-5-aminoimidazole to 5′-phosphoribosyl-4-carboxamide-5-aminoimidazole and the conversion of adenylosuccinic acid to AMP. EC 4.3.2.2.