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Journal of Bacteriology, August 1998, p. 3978-3982, Vol. 180, No. 15
0021-9193/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

The Flagellar Switch Genes fliM and fliN of Rhodobacter sphaeroides Are Contained in a Large Flagellar Gene Cluster

Norma García,1 Andrés Campos,1 Aurora Osorio,1 Sebastian Poggio,1 Bertha González-Pedrajo,2 Laura Camarena,1,* and Georges Dreyfus2

Departamento de Biología Molecular, Instituto de Investigaciones Biomédicas,1 and Departamento de Genética Molecular, Instituto de Fisiología Celular,2 UNAM, México 04510 D.F., Mexico

Received 6 February 1998/Accepted 22 May 1998

In this work, the genes that encode the FliM and FliN proteins of Rhodobacter sphaeroides were characterized. These genes are part of a large flagellar gene cluster in which six additional open reading frames encoding products homologous to FliL, FliO, FliP, FliQ, FliR, and FlhB proteins from other bacteria were identified. The inactivation of the fliM gene gave a nonflagellate phenotype (Fla-), suggesting that FliM is required for flagellar assembly. Complementation analysis of this fliM mutant indicated that fliM and fliN transcription starts beyond the 5' end of fliK and terminates after fliN.

* Corresponding author. Mailing address: Departamento de Biología Molecular, Instituto de Investigaciones Biomédicas UNAM, Apdo Postal 70-228, 04510 México, D. F., Mexico. Phone: (525) 622 38 24. Fax: (525) 622 38 91. E-mail: rosal{at}servidor.unam.mx.

Journal of Bacteriology, August 1998, p. 3978-3982, Vol. 180, No. 15
0021-9193/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


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