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Journal of Bacteriology, June 1999, p. 3849-3851, Vol. 181, No. 12
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Uptake of Pyocin S3 Occurs through the Outer Membrane Ferripyoverdine Type II Receptor of Pseudomonas aeruginosa

Christine Baysse,^1,2 Jean-Marie Meyer,³ Patrick Plesiat,¹ Valérie Geoffroy,^3, Yvon Michel-Briand,¹ and Pierre Cornelis^2,*

Laboratoire de Bactériologie, Faculté de Médecine, Université de Franche-Comté, 25030 Besançon,¹ and Laboratoire de Microbiologie et de Génétique, Université Louis Pasteur, UPRES-A 7010, F-67000 Strasbourg,³ France, and Laboratory of Microbial Interactions, Department of Immunology, Parasitology, and Ultrastructure, Flanders Interuniversity Institute of Biotechnology, Vrije Universiteit Brussel, B-1640 Sint Genesius Rode, Belgium²

Received 18 December 1998/Accepted 23 March 1999

Pyocin S3 was found to kill exclusively Pseudomonas aeruginosa isolates producing type II pyoverdine (exemplified by strain ATCC 27853). Killing was specifically inhibited by addition of type II ferripyoverdine. All Tn5 mutants resistant to pyocin S3 were defective for pyoverdine-mediated iron uptake and failed to produce an 85-kDa iron-repressed outer membrane protein. We conclude that this protein is probably the type II ferripyoverdine receptor that is used by pyocin S3 to gain entry into the cell.

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^* Corresponding author. Mailing address: Department of Immunology, Parasitology, and Ultrastructure, Flanders Interuniversity Institute of Biotechnology, Vrije Universiteit Brussel, Paardenstraat 65, B-1640 Sint Genesius Rode, Belgium. Phone: 32-2-359-0221. Fax: 32-2-359-0390. E-mail: pcornel{at}pop.vub.ac.be.

Present address: Department of Microbiology and Immunology, University of Kentucky, Lexington, KY 40536-0084.

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Journal of Bacteriology, June 1999, p. 3849-3851, Vol. 181, No. 12
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

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