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. 1992 Jul;174(14):4847–4849. doi: 10.1128/jb.174.14.4847-4849.1992

The pyocin Sa receptor of Pseudomonas aeruginosa is associated with ferripyoverdin uptake.

A W Smith 1, P H Hirst 1, K Hughes 1, K Gensberg 1, J R Govan 1
PMCID: PMC206286  PMID: 1320617

Abstract

We have used Tn5 mutagenesis to obtain a mutant resistant to pyocin Sa. When grown in iron-deficient succinate medium this mutant lacked an 85-kDa iron-regulated outer membrane protein (IROMP), and expression of a 75-kDa IROMP was increased compared with that in the parent strain. The mutant was deficient in pyoverdin biosynthesis and showed a 95% decrease in transport of ferripyoverdin purified from the parent strain, suggesting that the 85-kDa IROMP is the specific receptor for ferripyoverdin and pyocin Sa. The mutant compensated for the deficiency in pyoverdin biosynthesis and transport by exhibiting a fourfold increase in ferripyochelin transport. The low-level transport of ferripyoverdin in the Sa-resistant mutant, which extended to heterologous pyoverdins from other strains, suggests that Pseudomonas aeruginosa has a second ferripyoverdin uptake system of lower affinity and broader specificity.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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