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Infection and Immunity, December 2004, p. 7326-7329, Vol. 72, No. 12
0019-9567/04/$08.00+0     DOI: 10.1128/IAI.72.12.7326-7329.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

Two tonB Systems Function in Iron Transport in Vibrio anguillarum, but Only One Is Essential for Virulence

Michiel Stork,1 Manuela Di Lorenzo,1 Susana Mouriño,2 Carlos R. Osorio,2 Manuel L. Lemos,2 and Jorge H. Crosa1*

Department of Molecular Microbiology and Immunology, Oregon Health & Science University, Portland, Oregon,1 Departamento de Microbioloxia e Parasitoloxia, Universidade de Santiago de Compostela, Instituto de Acuicultura, Campus Sur, Santiago de Compostela, Galicia, Spain2

Received 15 July 2004/ Returned for modification 13 August 2004/ Accepted 30 August 2004

We have identified two functional tonB systems in the marine fish pathogen Vibrio anguillarum, tonB1 and tonB2. Each of the tonB genes is transcribed in an operon with the cognate exbB and exbD genes in response to iron limitation. Only tonB2 is essential for transport of ferric anguibactin and virulence.

* Corresponding author. Mailing address: Department of Molecular Microbiology and Immunology, Oregon Health & Science University, SW Sam Jackson Pk. Rd., Portland, OR 97239. Phone: (503) 494-7583. Fax: (503) 494-6862. E-mail: crosajor{at}ohsu.edu.

Editor: J. T. Barbieri

Infection and Immunity, December 2004, p. 7326-7329, Vol. 72, No. 12
0019-9567/04/$08.00+0     DOI: 10.1128/IAI.72.12.7326-7329.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.



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