Oxygen intervention in the regulation of gene expression: the photosynthetic bacterial paradigm

The means by which oxygen intervenes in gene expression has been examined in considerable detail in the metabolically versatile bacterium Rhodobacter sphaeroides. Three regulatory systems are now known in this organism, which are used singly and in combination to modulate genes in response to changi...

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Bibliographic Details
Published in:Cellular and molecular life sciences : CMLS 2004-02, Vol.61 (4), p.417-436
Main Authors: Zeilstra-Ryalls, J H, Kaplan, S
Format: Article
Language:English
Subjects:
Bacteria
Cell Membrane - physiology
Energy
Gene expression
Gene Expression Regulation, Bacterial - physiology
Oxygen
Oxygen - metabolism
Photosynthesis - physiology
Photosystem I Protein Complex - physiology
Photosystem II Protein Complex - physiology
Review
Rhodobacter sphaeroides
Rhodobacter sphaeroides - physiology
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Summary:The means by which oxygen intervenes in gene expression has been examined in considerable detail in the metabolically versatile bacterium Rhodobacter sphaeroides. Three regulatory systems are now known in this organism, which are used singly and in combination to modulate genes in response to changing oxygen availability. The outcome of these regulatory events is that the molecular machinery is present for the cell to obtain energy by means that are best suited to prevailing conditions, while at the same time maintaining cellular redox balance. Here, we explore the dangers associated with molecular oxygen relative to the various metabolisms used by R. sphaeroides, and then present the most recent findings regarding the features and operation of each of the three regulatory systems which collectively mediate oxygen control in this organism.
ISSN:1420-682X
1420-9071
DOI:10.1007/s00018-003-3242-1