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| Content Provider | PubMed Central |
|---|---|
| Author | Tichi, Mary A. Tabita, F. Robert |
| Copyright Year | 2001 |
| Abstract | In nonsulfur purple bacteria, redox homeostasis is achieved by the coordinate control of various oxidation-reduction balancing mechanisms during phototrophic anaerobic respiration. In this study, the ability of Rhodobacter capsulatus to maintain a balanced intracellular oxidation-reduction potential was considered; in addition, interrelationships between the control of known redox-balancing systems, the Calvin-Benson-Bassham, dinitrogenase and dimethyl sulfoxide reductase systems, were probed in strains grown under both photoheterotrophic and photoautotrophic growth conditions. By using cbb I (cbb form I operon)-, cbb II-, nifH-, and dorC-reporter gene fusions, it was demonstrated that each redox-balancing system responds to specific metabolic circumstances under phototrophic growth conditions. In specific mutant strains of R. capsulatus, expression of both the Calvin-Benson-Bassham and dinitrogenase systems was influenced by dimethyl sulfoxide respiration. Under photoheterotrophic growth conditions, coordinate control of redox-balancing systems was further manifested in ribulose 1,5-bisphosphate carboxylase/oxygenase and phosphoribulokinase deletion strains. These findings demonstrated the existence of interactive control mechanisms that govern the diverse means by which R. capsulatus maintains redox poise during photoheterotrophic and photoautotrophic growth. |
| Related Links | http://dx.doi.org/10.1128/jb.183.21.6344-6354.2001 |
| Ending Page | 6354 |
| Page Count | 11 |
| Starting Page | 6344 |
| File Format | |
| ISSN | 00219193 |
| e-ISSN | 10985530 |
| Journal | Journal of Bacteriology |
| Issue Number | 21 |
| Volume Number | 183 |
| Language | English |
| Publisher | American Society for Microbiology |
| Publisher Date | 2001-11-01 |
| Access Restriction | Open |
| Rights Holder | American Society for Microbiology |
| Subject Keyword | Molecular Biology Microbiology Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Molecular Biology Microbiology |
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