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Journal of Bacteriology, August 1998, p. 3983-3987, Vol. 180, No. 15
Institut für Mikrobiologie und
Molekularbiologie, D-35392 Giessen, Germany
Received 24 February 1998/Accepted 26 May 1998
The formation of the photosynthetic apparatus in Rhodobacter
capsulatus is regulated by oxygen tension. Previous studies
have shown a regulatory effect of oxygen on the transcription of
photosynthesis genes and on the stability of certain mRNA segments.
Here we show that oxygen affects puf and puc
gene expression posttranslationally and that this regulation
depends on the presence of bacteriochlorophyll. Our data suggest that
this posttranslational effect of oxygen on puf and
puc expression is due to the primary effect of oxygen on bacteriochlorophyll synthesis or assembly of pigment
protein complexes. Oxygen does not affect the rates of translation of puf-encoded proteins.
0021-9193/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Effect of Oxygen on Translation and Posttranslational Steps
in Expression of Photosynthesis Genes in
Rhodobacter capsulatus
*
Corresponding author. Mailing address: Institut
für Mikrobiologie und Molekularbiologie, Frankfurter Str. 107, D-35392 Giessen, Germany. Phone: (49) 641-99-35542. Fax: (49)
641-99-35549. E-mail: Gabriele.Klug{at}mikro.bio.uni-giessen.de.
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