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The regulatory role of ferric uptake regulator (Fur) during anaerobic respiration of Shewanella piezotolerans WP3

ABSTRACT: Purpose: The goal is to study the regulatory role of ferric uptake regulator (Fur) during anaerobic respiration in Shewanella piezotolerans WP3

ORGANISM(S): Shewanella piezotolerans WP3

PROVIDER: GSE47773 | GEO | 2016/06/10

SECONDARY ACCESSION(S): PRJNA207774

REPOSITORIES: GEO

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The regulatory role of ferric uptake regulator (Fur) during anaerobic respiration of Shewanella piezotolerans WP3

Project description:Purpose: The goal is to study the regulatory role of ferric uptake regulator (Fur) during anaerobic respiration in Shewanella piezotolerans WP3 mRNA profiles of WP3 wild type (WP3) and the fur mutant (Fur) were generated by deep sequencing using Illumina HiSeq 2000.

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Shewanella piezotolerans WP3

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The regulatory role of ferric uptake regulator (Fur) during anaerobic respiration of Shewanella piezotolerans WP3.

Project description:Ferric uptake regulator (Fur) is a global regulator that controls bacterial iron homeostasis. In this study, a fur deletion mutant of the deep-sea bacterium Shewanella piezotolerans WP3 was constructed. Physiological studies revealed that the growth rate of this mutant under aerobic conditions was only slightly lower than that of wild type (WT), but severe growth defects were observed under anaerobic conditions when different electron acceptors (EAs) were provided. Comparative transcriptomic analysis demonstrated that Fur is involved not only in classical iron homeostasis but also in anaerobic respiration. Fur exerted pleiotropic effects on the regulation of anaerobic respiration by controlling anaerobic electron transport, the heme biosynthesis system, and the cytochrome c maturation system. Biochemical assays demonstrated that levels of c-type cytochromes were lower in the fur mutant, consistent with the transcriptional profiling. Transcriptomic analysis and electrophoretic mobility shift assays revealed a primary regulation network for Fur in WP3. These results suggest that Fur may act as a sensor for anoxic conditions to trigger and influence the anaerobic respiratory system.

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