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- W2034138121 abstract "Pseudomonas aeruginosa has two siderophore-based high-affinity iron-uptake systems utilizing pyoverdin and pyochelin. Using strain IA1, a mutant deficient in production of both siderophores, we have shown that addition of purified siderophore to the growth medium induces expression of specific iron-regulated outer-membrane proteins and increases 55Fe-siderophore transport. Addition of pyoverdin from the parent strain PAO1 or from a clinical strain 0:12 induced expression of an 85 kDa IROMP and increased the rate of 55Fe-pyoverdin transport. Transport rates for 55Fe-PAO1 pyoverdin increased from 1.27 to 3.57 pmol Fe min-1 per 109 cells. Addition of purified pyochelin induced expression of a 75 kDa IROMP accompanied with increased 55Fe-pyochelin uptake without affecting 55Fe-pyoverdin transport. 55Fe-pyochelin transport increased from 0.3 to 10.6 pmol min-1 per 109 cells. Addition of pyoverdin from the parent strain or a chromatographically distinct pyoverdin caused increased reactivity with an anti-85 kDa mAb in Western blotting, indicating that the same receptor is being induced. These results suggest that P. aeruginosa can respond specifically to the presence of siderophore and moreover that not only can the pyoverdin receptor transport its cognate ferri-pyoverdin but also different ferri-pyoverdins, albeit at a reduced rate." @default.
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- W2034138121 date "1992-11-01" @default.
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- W2034138121 title "Siderophore-specific induction of iron uptake in Pseudomonas aeruginosa" @default.
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- W2034138121 doi "https://doi.org/10.1099/00221287-138-11-2381" @default.
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