Modulation of Iron-Uptake Systems by a Mutation of luxS Encoding an Autoinducer-2 Synthase in Vibrio vulnificus

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概要

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• Vibrio vulnificus possesses multiple iron-uptake systems which are mediated by VuuA (vulnibactin receptor), IutA (aerobactin receptor) and HupA (heme receptor). In this study, we determined the effect of a mutation of luxS encoding autoinducer-2 (AI-2) synthase on the expressions of the three receptors. A mutation and an in trans complementation of luxS did not affect the growing ability of V. vulnificus in iron-deficient conditions. Nevertheless, the luxS mutation slightly decreased vuuA expression, but slightly increased iutA and hupA expressions in the transcriptional reporter assay or Western blot analysis. These changes were all recovered by the luxS complementation. These results suggest that AI-2-mediated quorum sensing system may be involved in the fine modulation of V. vulnificus iron-uptake systems, positively affecting vuuA expression but negatively affecting iutA and hupA expressions.

• 公益社団法人　日本薬学会の論文

著者

• SHIN Sung

  Research Center for Resistant Cells, Chosun University Medical School

• Kim Choon

  Research Center for Resistant Cells, Chosun University Medical School

関連論文

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• Inactivation of Vibrio vulnificus Hemolysin by Oligomerization but Not Proteolysis(Microbiology)
• Production of Catechol-Siderophore and Utilization of Transferrin-Bound Iron in Bacillus cereus(Miscellaneous)
• Modulation of Iron-Uptake Systems by a Mutation of luxS Encoding an Autoinducer-2 Synthase in Vibrio vulnificus

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