A glutathione redox effect on photosynthetic membrane expression in Rhodospirillum rubrum.

ABSTRACT: The formation of intracytoplasmic photosynthetic membranes by facultative anoxygenic photosynthetic bacteria has become a prime example for exploring redox control of gene expression in response to oxygen and light. Although a number of redox-responsive sensor proteins and transcription factors have been characterized in several species during the last several years in some detail, the overall understanding of the metabolic events that determine the cellular redox environment and initiate redox signaling is still poor. In the present study we demonstrate that in Rhodospirillum rubrum, the amount of photosynthetic membranes can be drastically elevated by external supplementation of the growth medium with the low-molecular-weight thiol glutathione. Neither the widely used reductant dithiothr

SUBMITTER: Carius AB 

PROVIDER: S-EPMC3133034 | biostudies-literature | 2011 Apr

REPOSITORIES: biostudies-literature