, Volume 6, Issue 4, pp 234–238

The nutritional selectivity of a siderophore-catabolizing bacterium


  • Rosemary DeAngelis
    • Department of BiologyLoyola University of Chicago
    • Department of Internal MedicineThe University of Chicago Medical Center
  • Michelle Forsyth
    • Department of BiologyLoyola University of Chicago
  • Domenic Castignetti
    • Department of BiologyLoyola University of Chicago
Research Papers

DOI: 10.1007/BF00187761

Cite this article as:
DeAngelis, R., Forsyth, M. & Castignetti, D. Biometals (1993) 6: 234. doi:10.1007/BF00187761


The ability of a siderophore-catabolizing bacterium to assimilate ferric ion was examined. While the bacterium utilizes the siderophore deferrioxamine B (DFB) as a carbon source, it was incapable of using the ferricion analogue (ferrioxamine B) as an iron source. It did, however, assimilate the ferric ion of the chelator ferric nitrilotriacetic acid and of the siderophore ferrirhodotorulic acid (ferriRA). Neither ferriRA nor its deferrated analog (RA), however, were capable of functioning as carbon sources for the bacterium. The microbe thus employs a ‘nutritional selectivity’ with respect to these two siderophores. That is, it does not use the siderophore it employs as a carbon source (DFB) as an iron source nor does the siderophore utilized as an iron source, i.e. ferriRA, nor its deferrated analog (RA), serve as carbon sources for the organism.


deferrioxamine Bnutritional selectivityrhodotorulic acidsiderophore catabolism
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© Rapid Communications of Oxford Ltd 1993