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Applied and Environmental Microbiology, August 2002, p. 4136-4139, Vol. 68, No. 8
0099-2240/02/$04.00+0     DOI: 10.1128/AEM.68.8.4136-4139.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.

Characterization of ISRgn1, a Novel Insertion Sequence of the IS3 Family Isolated from a Bacteriocin-Negative Mutant of Ruminococcus gnavus E1

Ana Gomez,1* Monique Ladire,2 Francoise Marcille,2 Michelle Nardi,3 and Michel Fons4

Mixis France, Faculte de Medicine Necker-Enfants Malades, 75730 Paris Cedex 15, France,1 Unité d'Ecologie et Physiologie du Système Digestif, Institut National de la Recherche Agronomique, 78352 Jouy en Josas Cedex,2 Unité de Biochimie et Structure des Protéines, Institut National de la Recherche Agronomique, 78352 Jouy-en-Josas Cedex,3 Institut Méditerranéen de Recherche en Nutrition, Faculté des Sciences et Techniques de Marseille St Jérôme, Av. Escadrille Normandie Niemen, 13397 Marseille Cedex 20, France4

Received 26 December 2001/ Accepted 18 April 2002

ISRgn1, an insertion sequence of the IS3 family, has been identified in the genome of a bacteriocin-negative mutant of Ruminococcus gnavus E1. The copy number of ISRgn1 in R. gnavus E1, as well as its distribution among phylogenetically E1-related strains, has been determined. Results obtained suggest that ISRgn1 is not indigenous to the R. gnavus phylogenetic group but that it can transpose in this bacterium.

* Corresponding author. Mailing address: Mixis France. Faculte de Medicine Necker-Enfants Malades, 6eme etage. 156, rue de Vaugirard, 75730 Paris Cedex 15, France. Phone: (33) 1 40 61 56 65. Fax: (33) 1 40 61 56 61. E-mail: ana.gomez{at}mixis.fr.

Applied and Environmental Microbiology, August 2002, p. 4136-4139, Vol. 68, No. 8
0099-2240/02/$04.00+0     DOI: 10.1128/AEM.68.8.4136-4139.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.



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