Pyoverdine-Mediated Regulation of FpvA Synthesis in Pseudomonas aeruginosa : Involvement of a Probable Extracytoplasmic-Function Sigma Factor, FpvI
Open Access
- 15 February 2003
- journal article
- Published by American Society for Microbiology in Journal of Bacteriology
- Vol. 185 (4) , 1261-1265
- https://doi.org/10.1128/jb.185.4.1261-1265.2003
Abstract
A search of the pvd pyoverdine biosynthesis locus of Pseudomonas aeruginosa identified an open reading frame, PA2387, whose product exhibited a sequence similar to those of a number of so-called extracytoplasmic- function sigma factors responsible for siderophore-dependent expression of iron-siderophore receptors in Escherichia coli and Pseudomonas putida . Deletion of this gene, dubbed fpvI , compromised pyoverdine-dependent FpvA ferric pyoverdine receptor production and fpvA gene expression, while the cloned gene stimulated fpvA expression. A Fur-binding site was identified immediately upstream of fpvI , consistent with the observed iron-regulated expression of fpvI and fpvA .Keywords
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