intramolecular transferase activity 5-(carboxyamino)imidazole ribonucleotide mutase activity https://github.com/geneontology/go-ontology/issues/30193 N5-carboxyaminoimidazole ribonucleotide mutase activity Catalysis of the reaction: 5-carboxyamino-1-(5-phospho-D-ribosyl)imidazole = 5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxylate. PurE MetaCyc:RXN0-743 RHEA:13193 5-carboxyamino-1-(5-phospho-D-ribosyl)imidazole carboxymutase activity class I PurE molecular_function N5-CAIR mutase activity GO:0034023 EC:5.4.99.18