title: Importance of Rhodospirillum rubrum H(+)-pyrophosphatase under low-energy conditions.
abstract: 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.
authors.affiliation: Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, México, D.F., Mexico.
authors.forename: Rodolfo
authors.initials: R
authors.lastname: García-Contreras
authors.forename: Heliodoro
authors.initials: H
authors.lastname: Celis
authors.forename: Irma
authors.initials: I
authors.lastname: Romero
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D000332:Aerobiosis; D004734:Energy Metabolism; D043564:Inorganic Pyrophosphatase / Q000502:physiology*; D008027:Light; D010788:Photosynthesis; D012247:Rhodospirillum rubrum / Q000201:enzymology* / Q000254:growth & development
chemical_list: D000255:Adenosine Triphosphate; D043564:Inorganic Pyrophosphatase