1-(5-phosphoribosyl)-5-[(5-phosphoribosylamino)methylideneamino]imidazole-4-carboxamide isomerase activity https://github.com/geneontology/go-ontology/issues/30193 GO:0003949 phosphoribosylformimino-5-aminoimidazole carboxamide ribotide isomerase activity EC:5.3.1.16 N-(5'-phospho-D-ribosylformimino)-5-amino-1-(5''-phosphoribosyl)-4-imidazolecarboxamide isomerase activity N-(phosphoribosylformimino) aminophosphoribosylimidazolecarboxamide isomerase activity RHEA:15469 MetaCyc:PRIBFAICARPISOM-RXN 1-(5-phosphoribosyl)-5-[(5-phosphoribosylamino)methylideneamino]imidazole-4-carboxamide aldose-ketose-isomerase activity molecular_function phosphoribosylformiminoaminophosphoribosylimidazolecarboxamide isomerase activity 1-(5-phosphoribosyl)-5-[(5-phosphoribosylamino)methylideneamino]imidazole-4-carboxamide ketol-isomerase activity KEGG_REACTION:R04640 Catalysis of the reaction: 1-(5-phosphoribosyl)-5-[(5-phosphoribosylamino)methylideneamino]imidazole-4-carboxamide = 5-[(5-phospho-1-deoxy-D-ribulos-1-ylimino)methylamino]-1-(5-phospho-D-ribosyl)imidazole-4-carboxamide. intramolecular oxidoreductase activity, interconverting aldoses and ketoses