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Journal of Bacteriology, April 2001, p. 2682-2685, Vol. 183, No. 8
0021-9193/01/$04.00+0   DOI: 10.1128/JB.183.8.2682-2685.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

glnD and mviN Are Genes of an Essential Operon in Sinorhizobium meliloti

Paul A. Rudnick,1,2,dagger Tania Arcondéguy,1,Dagger Christina K. Kennedy,2 and Daniel Kahn1,*

Laboratoire de Biologie Moléculaire des Relations Plantes-Microorganismes, INRA/CNRS, 31326 Castanet-Tolosan Cedex, France,1 and Department of Plant Pathology, The University of Arizona, Tucson, Arizona 857212

Received 6 October 2000/Accepted 11 January 2001

To evaluate the role of uridylyl-transferase, the Sinorhizobium meliloti glnD gene was isolated by heterologous complementation in Azotobacter vinelandii. The glnD gene is cotranscribed with a gene homologous to Salmonella mviN. glnD1::Omega or mviN1::Omega mutants could not be isolated by a powerful sucrose counterselection procedure unless a complementing cosmid was provided, indicating that glnD and mviN are members of an indispensable operon in S. meliloti.

* Corresponding author. Mailing address: Laboratoire de Biologie Moléculaire des Relations Plantes-Microorganismes, INRA/CNRS, BP 27, 31326 Castanet-Tolosan Cedex, France. Phone: 33(05)61.28.53.29. Fax: 33(05)61.28.50.61. E-mail: dkahn{at}toulouse.inra.fr.

dagger Present address: Department of Plant Pathology, The University of Arizona, Tucson, AZ 85721.

Dagger Present address: Facultad de Quimica, Dept. de Bioquimica, 41080 Seville, Spain.

Journal of Bacteriology, April 2001, p. 2682-2685, Vol. 183, No. 8
0021-9193/01/$04.00+0   DOI: 10.1128/JB.183.8.2682-2685.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


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