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Expression of Pseudomonas aeruginosa aer-2, One of Two Aerotaxis Transducer Genes, Is Controlled by RpoS

Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Hiroshima,¹ Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, Osaka, Japan²

Received 8 October 2004/ Accepted 12 November 2004

Pseudomonas aeruginosa possesses two aerotaxis transducers, Aer and Aer-2. A deletion-insertion mutation of alternative sigma factor RpoS eliminated Aer-2-mediated aerotaxis but not Aer-mediated aerotaxis. Transcriptional analysis revealed that cheY2, cheA2, cheW2, and aer-2 were expressed in an RpoS-dependent manner as a single transcript.

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