TABLE 1.

Iron sources and relevant uptake systems in E. coli, C. jejuni, and H. pylori

Organism and iron sourceUptake systemReference(s)
E. coli
    Ferri-enterochelinFep, Cir, Fiu386, 449
    Ferri-hydroxamatesaFhuA172, 303, 343
    Rhodotorulic acidFhuE519
    Heme/hemoglobinChuA, Hbp466, 603
    Ferrous ironFeo243, 306
    Ferric citrateFec493
C. jejuni
    Ferri-enterochelinCfrA, CfrB, Ceu37, 233, 467, 502, 655
    FerrichromeCfuA195
    Rhodotorulic acidP19, Cj1588-Cj1663283, 574
    HemeChu503
    TransferrinCj0173c-Cj0178 (Cfbp/Ctu)419, 611
    LactoferrinCj0173c-Cj0178 (Cfbp/Ctu)419, 611
    OvotransferrinCj0173c-Cj0178 (Cfbp/Ctu)419, 611
    Ferrous ironFeo439
H. pylori
    Ferrous ironFeo599, 614
    HemoglobinFrpB2212, 533
    TransferrinUnknown533
    LactoferrinUnknown274, 533
    HemeUnknown134, 649
    Ferric citrateFecb117, 599, 614
  • a Hydroxamates include both aerobactin and ferrichrome.

  • b The function of the Fec system in H. pylori has not been fully verified.