This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrowReprints and Permissions
Right arrow Copyright Information
Right arrow Books from ASM Press
Right arrow MicrobeWorld
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Yakunin, A. F.
Right arrow Articles by Hallenbeck, P. C.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Yakunin, A. F.
Right arrow Articles by Hallenbeck, P. C.

 Previous Article  |  Next Article 

Journal of Bacteriology, December 1998, p. 6392-6395, Vol. 180, No. 23
0021-9193/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Short-Term Regulation of Nitrogenase Activity by NH4+ in Rhodobacter capsulatus: Multiple In Vivo Nitrogenase Responses to NH4+ Addition

Alexander F. Yakunin and Patrick C. Hallenbeck*

Département de Microbiologie et Immunologie, Université de Montréal, Montréal, Québec H3C 3J7, Canada

Received 30 July 1998/Accepted 28 September 1998

The photosynthetic bacterium Rhodobacter capsulatus has been shown to carry out nitrogenase "switch-off," a rapid, reversible inhibition of in vivo activity. Here, we demonstrate that highly nitrogen-limited cultures of both the wild-type strain and a draT draG mutant are capable of nitrogenase switch-off while moderately nitrogen-limited cultures show instead a "magnitude" response, with a decrease in in vivo nitrogenase activity that is proportional to the amount of added NH4+.

* Corresponding author. Mailing address: Département de Microbiologie et Immunologie, Université de Montréal, C.P. 6128, succursale Centre-ville, Montréal, Québec H3C 3J7, Canada. Phone: (514) 343-6278. Fax: (514) 343-5701. E-mail: patrick.hallenbeck{at}umontreal.ca.

Journal of Bacteriology, December 1998, p. 6392-6395, Vol. 180, No. 23
0021-9193/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


This article has been cited by other articles:

  • Tremblay, P.-L., Hallenbeck, P. C. (2008). Ammonia-Induced Formation of an AmtB-GlnK Complex Is Not Sufficient for Nitrogenase Regulation in the Photosynthetic Bacterium Rhodobacter capsulatus. J. Bacteriol. 190: 1588-1594 [Abstract] [Full Text]  
  • Tremblay, P.-L., Drepper, T., Masepohl, B., Hallenbeck, P. C. (2007). Membrane Sequestration of PII Proteins and Nitrogenase Regulation in the Photosynthetic Bacterium Rhodobacter capsulatus. J. Bacteriol. 189: 5850-5859 [Abstract] [Full Text]  
  • Drepper, T., Gross, S., Yakunin, A. F., Hallenbeck, P. C., Masepohl, B., Klipp, W. (2003). Role of GlnB and GlnK in ammonium control of both nitrogenase systems in the phototrophic bacterium Rhodobacter capsulatus. Microbiology 149: 2203-2212 [Abstract] [Full Text]  
  • Yakunin, A. F., Hallenbeck, P. C. (2002). AmtB Is Necessary for NH4+-Induced Nitrogenase Switch-Off and ADP-Ribosylation in Rhodobacter capsulatus. J. Bacteriol. 184: 4081-4088 [Abstract] [Full Text]  
  • Martin, D. E., Reinhold-Hurek, B. (2002). Distinct Roles of PII-Like Signal Transmitter Proteins and amtB in Regulation of nif Gene Expression, Nitrogenase Activity, and Posttranslational Modification of NifH in Azoarcus sp. Strain BH72. J. Bacteriol. 184: 2251-2259 [Abstract] [Full Text]  
  • Pan, B., Vessey, J. K. (2001). Response of the Endophytic Diazotroph Gluconacetobacter diazotrophicus on Solid Media to Changes in Atmospheric Partial O2 Pressure. Appl. Environ. Microbiol. 67: 4694-4700 [Abstract] [Full Text]  
  • Egener, T., Martin, D. E., Sarkar, A., Reinhold-Hurek, B. (2001). Role of a Ferredoxin Gene Cotranscribed with the nifHDK Operon in N2 Fixation and Nitrogenase "Switch-Off" of Azoarcus sp. Strain BH72. J. Bacteriol. 183: 3752-3760 [Abstract] [Full Text]  
  • Arcondeguy, T., Jack, R., Merrick, M. (2001). PII Signal Transduction Proteins, Pivotal Players in Microbial Nitrogen Control. Microbiol. Mol. Biol. Rev. 65: 80-105 [Abstract] [Full Text]  
  • Jeong, H.-S., Jouanneau, Y. (2000). Enhanced Nitrogenase Activity in Strains of Rhodobacter capsulatus That Overexpress the rnf Genes. J. Bacteriol. 182: 1208-1214 [Abstract] [Full Text]  
  • Yakunin, A. F., Laurinavichene, T. V., Tsygankov, A. A., Hallenbeck, P. C. (1999). The Presence of ADP-Ribosylated Fe Protein of Nitrogenase in Rhodobacter capsulatus Is Correlated with Cellular Nitrogen Status. J. Bacteriol. 181: 1994-2000 [Abstract] [Full Text]  


Copyright © 2009 by the American Society for Microbiology.   For an alternate route to Journals.ASM.org, visit: http://intl-journals.asm.org | More Info»