Siderophores, the iron nutrition of plants, and nitrate reductase

Iron is ubiquitous in terrestrial environments. It is, however, very sparingly soluble under aerobic conditions as ferric hydroxides are formed and the solubility product approaches 10 super(-38). Microorganisms have solved the problem of iron acquisition under aerobiosis by synthesizing siderophore...

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Veröffentlicht in:FEBS Letters 1986-12, Vol.209 (2), p.147-151
Hauptverfasser: Castignetti, Domenic, Smarrelli, John
Format: Artikel
Sprache:eng
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Zusammenfassung:Iron is ubiquitous in terrestrial environments. It is, however, very sparingly soluble under aerobic conditions as ferric hydroxides are formed and the solubility product approaches 10 super(-38). Microorganisms have solved the problem of iron acquisition under aerobiosis by synthesizing siderophores, i.e. high-affinity Fe super(3+)-chelating compounds with formation constants ranging from approx. 10 super(20) to 10 super(50). Siderophores are organic compounds comprised of either hydroxamates or catecholates. A new category of siderophores, termed the "miscellaneous" class, has been recently recognized and this group differs in chemical structure from the previous classes of siderophores, most likely containing imino or amino carboxylic acids.
ISSN:0014-5793
1873-3468
DOI:10.1016/0014-5793(86)81100-0