Searching for Enyzme Commission number 6.3.4.18 (5-(carboxyamino)imidazole ribonucleotide synthase.) by Reannotation, by TIGRFam, by KEGG ortholog group, by SEED annotation, or by best hit in MetaCyc

Match by KEGG's EC number for 6.3.4.18

Gene ID	Gene Name	KO	KO Description	Genome	Fitness
b0522	purK	K01589	5-(carboxyamino)imidazole ribonucleotide synthase	Escherichia coli BW25113	strong

Or search for '6.3.4.18' in Escherichia coli BW25113 using Curated BLAST