Haem iron‐transport system in enterohaemorrhagic Escherichia coli O157:H7

In this study, we identified the iron‐transport systems of Escherichia coli O157:H7 strain EDL933. This strain synthesized and transported enterobactin and had a ferric citrate transport system but lacked the ability to produce or use aerobactin. It used haem and haemoglobin, but not transferrin or lactoferrin, as iron sources. We cloned the gene encoding an iron‐regulated haem‐transport protein and showed that this E. coli haem‐utilization gene...