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Journal of Bacteriology, June 2004, p. 3653-3655, Vol. 186, No. 11
0021-9193/04/$08.00+0     DOI: 10.1128/JB.186.11.3653-3655.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

The Global Arginine Regulator ArgR Controls Expression of argF in Pseudomonas syringae pv. phaseolicola but Is Not Required for the Synthesis of Phaseolotoxin or for the Regulated Expression of argK{dagger}

José Luis Hernández-Flores, Karina López-López, Rogelio Garcidueñas-Piña, Alba E. Jofre-Garfias, and Ariel Alvarez-Morales*

Departamento de Ingeniería Genética de Plantas, Centro de Investigación y de Estudios Avanzados I.P.N., Unidad Irapuato, Irapuato Gto., C.P. 36500, México

Received 18 September 2003/ Accepted 10 February 2004

In Pseudomonas syringae pv. phaseolicola the enzyme ornithine carbamoyltransferase (OCTase), encoded by argF, is negatively regulated by argR, similar to what has been reported for Pseudomonas aeruginosa. However, production of the phaseolotoxin-resistant OCTase encoded by argK, synthesis of phaseolotoxin, and infectivity for bean pods occur independently of the ArgR protein.

* Corresponding author. Mailing address: Departamento de Ingeniería Genética de Plantas, Centro de Investigación y de Estudios Avanzados I.P.N., Unidad Irapuato, Irapuato Gto., México. Phone: 52 462 62 39600. Fax: 52 462 62 45849. E-mail: aalvarez{at}ira.cinvestav.mx.

{dagger} This work is dedicated to the memory of our friend and colleague Esther de Ita Morales.

Journal of Bacteriology, June 2004, p. 3653-3655, Vol. 186, No. 11
0021-9193/04/$08.00+0     DOI: 10.1128/JB.186.11.3653-3655.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.





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