English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Shewanella  species are facultative anaerobic bacteria that colonize redox-stratified habitats where O 2  and nutrient concentrations fluctuate. The model species  Shewanella oneidensis  MR-1 possesses genes coding for three terminal oxidases that can perform O 2  respiration: a  bd -type quinol oxidase and cytochrome  c  oxidases of the  cbb  3 -type and the A-type. Whereas the  bd - and  cbb  3 -type oxidases are routinely detected, evidence for the expression of the A-type enzyme has so far been lacking. Here, we investigated the effect of nutrient starvation on the expression of these terminal oxidases under different O 2  tensions. Our results reveal that the  bd -type oxidase plays a significant role under nutrient starvation in aerobic conditions. The expression of the  cbb  3 -type oxidase is also modulated by the nutrient composition of the medium and increases especially under iron-deficiency in exponentially growing cells. Most importantly, under conditions of carbon depletion, high O 2  and stationary-growth, we report for the first time the expression of the A-type oxidase in  S. oneidensis,  indicating that this terminal oxidase is not functionally lost. The physiological role of the A-type oxidase in energy conservation and in the adaptation of  S. oneidensis  to redox-stratified environments is discussed.

Expression of terminal oxidases under nutrient-starved conditions in Shewanella oneidensis: detection of the A-type cytochrome c oxidase