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Journal of Bacteriology, November 2001, p. 6710-6713, Vol. 183, No. 22
0021-9193/01/$04.00+0   DOI: 10.1128/JB.183.22.6710-6713.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Control of Nitrogenase Reactivation by the GlnZ Protein in Azospirillum brasilense

Giseli Klassen,1,2 Emanuel M. de Souza,1 M. Geoffrey Yates,1 Liu Un Rigo,1 Juliana Inaba,1 and Fábio de Oliveira Pedrosa1,*

Departamento de Bioquímica e Biologia Molecular1 and Departamento de Patologia Básica,2 Universidade Federal do Paraná, 81531-970, Curitiba, Paraná, Brazil

Received 22 May 2001/Accepted 29 August 2001

The glnZ mutant of Azospirillum brasilense (strain 7611) showed only partial recovery (20 to 40%) after 80 min of ammonia-induced nitrogenase switch-off, whereas the wild type recovered totally within 10 min. In contrast, the two strains showed identical anoxic-induced switch-on/switch-off, indicating no cross talk between the two reactivation mechanisms.

* Corresponding author. Mailing address: Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Caixa Postal 19046, CEP-81531-970, Curitiba, Paraná, Brazil. Phone: 55 41 366 4398. Fax: 55 41 266 2042. E-mail: fpedrosa{at}bio.ufpr.br.

Journal of Bacteriology, November 2001, p. 6710-6713, Vol. 183, No. 22
0021-9193/01/$04.00+0   DOI: 10.1128/JB.183.22.6710-6713.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


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