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Journal of Bacteriology, October 2004, p. 6651-6655, Vol. 186, No. 19
0021-9193/04/$08.00+0     DOI: 10.1128/JB.186.19.6651-6655.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

Importance of Rhodospirillum rubrum H+-Pyrophosphatase under Low-Energy Conditions

Rodolfo García-Contreras,1 Heliodoro Celis,2 and Irma Romero1*

Departamento de Bioquímica, Facultad de Medicina,1 Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México, D.F., Mexico2

Received 23 March 2004/ Accepted 29 June 2004

The physiological role of the membrane-bound pyrophosphatase of Rhodospirillum rubrum was investigated by the characterization of a mutant strain. Comparisons of growth levels between the wild type and the mutant under different low-potential conditions and during transitions between different metabolisms indicate that this enzyme provides R. rubrum with an alternative energy source that is important for growth in low-energy states.

* Corresponding author. Mailing address: Departamento de Bioquímica, Facultad de Medicina, Edificio D, 2° Piso, Universidad Nacional Autónoma de México, 04510 México, D.F., Mexico. Phone: (52 55) 5623 2511. Fax: (52 55) 5616 2419. E-mail: iromero{at}ifisiol.unam.mx.

Journal of Bacteriology, October 2004, p. 6651-6655, Vol. 186, No. 19
0021-9193/04/$08.00+0     DOI: 10.1128/JB.186.19.6651-6655.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Au, K. M., Barabote, R. D., Hu, K. Y., Saier, M. H. Jr (2006). Evolutionary appearance of H+-translocating pyrophosphatases.. Microbiology 152: 1243-1247 [Full Text]  


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