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FEMS Microbiol Lett. 2000 Jan 1;182(1):177-83.

An aerotaxis transducer gene from Pseudomonas putida.

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Fermentation Biochemistry Research Unit, National Center for Agricultural Utilization Research, U.S. Department of Agriculture, Agricultural Research Service, Peoria, IL 61604, USA.


An aerotaxis gene, aer, was cloned from Pseudomonas putida PRS2000. A P. putida aer mutant displayed an altered aerotactic response in a capillary assay. Wild-type P. putida clustered at the air/liquid interface. In contrast, the aer mutant did not cluster at the interface, but instead formed a diffuse band at a distance from the meniscus. Wild-type aer, provided in trans, complemented the aer mutant to an aerotactic response that was stronger than wild-type. The P. putida Aer sequence is similar over its entire length to the aerotaxis (energy taxis) signal transducer protein, Aer, of Escherichia coli. The amino-terminus is similar to redox-sensing regulatory proteins, and the carboxy-terminus contains the highly conserved domain present in chemotactic transducers.

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