Journal article
Specificity of siderophore-mediated transport of iron in rhizobia
Archives of Microbiology, Vol.161(4), pp.333-339
1994
Abstract
The trihydroxamate siderophore, hydroxamate K, has been purified from culture filtrates of iron-deficient Rhizobium leguminosarum biovar viciae MNF710. The iron complex has a molecular weight of 828 and an absorption maximum at 443 nm (εM=1510). 55Fe complexed to purified hydroxamate K was taken up by MNF710, its hydroxamate-negative mutant MNF7102 and Rhizobium leguminosarum biovar trifolii WU95 via an iron-regulated transport system, but Rhizobium meliloti U45 failed to take up the iron-siderophore complex under any conditions. A similar pattern of iron uptake was observed with ferrioxamine B. MNF710, MNF7102, U45 and WU95 all transported 55Fe-ferrichrome but only the first three strains took up 55Fe-ferrichrome A. All these 55Fe-trihydroxamate uptake systems were ironregulated in MNF710, MNF7102 and WU95. In contrast, uptake of 55Fe-rhodotorulate, a dihydroxamate, was essentially constitutive in all four organisms. Similarly, uptake of 55Fe-citrate and 55Fe-nitrilotriacetic acid was constitutive. None of the strains took up 55Fe complexed with enterobactin or with pyoverdins from Pseudomonas aeruginosa ATCC15692 (PAO1) and Pseudomonas fluorescens ATCC17400.
Details
- Title
- Specificity of siderophore-mediated transport of iron in rhizobia
- Authors/Creators
- K.C. Carson (Author/Creator) - Murdoch UniversityA.R. Glenn (Author/Creator) - Murdoch UniversityM.J. Dilworth (Author/Creator) - Murdoch University
- Publication Details
- Archives of Microbiology, Vol.161(4), pp.333-339
- Publisher
- Springer Verlag
- Identifiers
- 991005541794107891
- Murdoch Affiliation
- School of Biological and Environmental Sciences
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 1 Clinical & Life Sciences
- 1.42 Bacteriology
- 1.42.839 Outer Membrane
- Web Of Science research areas
- Microbiology
- ESI research areas
- Microbiology