ID 5.4.99.18 DE 5-(carboxyamino)imidazole ribonucleotide mutase. AN N(5)-CAIR mutase. AN N(5)-carboxyaminoimidazole ribonucleotide mutase. CA 5-carboxyamino-1-(5-phospho-D-ribosyl)imidazole + H(+) = 5-amino-1- CA (5-phospho-D-ribosyl)imidazole-4-carboxylate. CC -!- In eubacteria, fungi and plants, this enzyme, along with EC 6.3.4.18, CC is required to carry out the single reaction catalyzed by EC 4.1.1.21 CC in vertebrates. CC -!- In the absence of EC 6.3.2.6, the reaction is reversible. CC -!- The substrate is readily converted into 5-amino-1-(5-phospho-D- CC ribosyl)imidazole by non-enzymic decarboxylation. DR Q5E1R4, PURE_ALIF1 ; O67239, PURE_AQUAE ; P12044, PURE_BACSU ; DR P52558, PURE_BRUME ; Q8FYW3, PURE_BRUSU ; Q44679, PURE_CORAM ; DR P0AG19, PURE_ECO57 ; P0AG18, PURE_ECOLI ; P43849, PURE_HAEIN ; DR Q58033, PURE_METJA ; P22348, PURE_METSM ; P41654, PURE_METTH ; DR P46702, PURE_MYCLE ; P9WHM0, PURE_MYCTO ; P9WHM1, PURE_MYCTU ; DR P72157, PURE_PSEAE ; Q9UY68, PURE_PYRAB ; O58058, PURE_PYRHO ; DR O06456, PURE_SACS2 ; Q55498, PURE_SYNY3 ; Q9WYS7, PURE_THEMA ; DR Q9KVT7, PURE_VIBCH ; Q87KE1, PURE_VIBPA ; Q8DDD7, PURE_VIBVU ; DR Q7MGL2, PURE_VIBVY ; //