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The photoreaction center of Rhodospirillum rubrum mutant strain F24.1

AutorPicorel Castaño, Rafael ; Campo, Francisca F. del; Ramírez, Juan Manuel ; Gingras, Gabriel
Palabras claveGenetics
Mutation
Photosynthesis
Polyacrylamide gel electrophoresis
Drug effect
Bacterial chromatophore
Rhodospirillum rubrum
Fecha de publicación1980
EditorElsevier
CitaciónBiochimica et Biophysica Acta (BBA) - Bioenergetics 593 (1): 76-84 (1980)
ResumenRhodospirillum rubrum strain F24.1 is a spontaneous revertant of nonphototrophic mutant F24 derived from wild-type strain S1. Strain F24 shows no detectable photochemical activity and contains, at most, traces of the photoreaction center polypeptides. Strain F24.1 has a phototrophic growth rate close to that of the wild-type strain (Picorel, R., del Valle-Tascón, S. and Ramírez, J.M. (1977) Arch. Biophys. Biochem. 181, 665-670) but shows little photochemical activity. Light-induced absorbance changes in the near-infrared, photoinduced EPR signals and ferricyanide-elicited absorbance changes indicate that strain F24.1 has a photoreaction center content of 7-8% as compared to strain S1. Polyacrylamide gel electrophoresis of isolated F24.1 chromatophores shows the photoreaction center polypeptides to be present in amounts compatible with this value. Photoreaction center was prepared from strain F24.1 and showed no detectable difference with that of strain S1. It is concluded that strain F24.1 photosynthesis is due entirely to its residual 7-8% of typical photoreaction center.
Versión del editorhttp://dx.doi.org/10.1016/0005-2728(80)90009-2
URIhttp://hdl.handle.net/10261/96047
DOI10.1016/0005-2728(80)90009-2
Identificadoresissn: 0005-2728
issn: 0006-3002
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