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Dynamic subcellular localization of a respiratory complex controls bacterial respiration.

ABSTRACT: Respiration, an essential process for most organisms, has to optimally respond to changes in the metabolic demand or the environmental conditions. The branched character of their respiratory chains allows bacteria to do so by providing a great metabolic and regulatory flexibility. Here, we show that the native localization of the nitrate reductase, a major respiratory complex under anaerobiosis in Escherichia coli, is submitted to tight spatiotemporal regulation in response to metabolic conditions via a mechanism using the transmembrane proton gradient as a cue for polar localization. These dynamics are critical for controlling the activity of nitrate reductase, as the formation of polar assemblies potentiates the electron flux through the complex. Thus, dynamic subcellular localization emerges as a critical factor in the control of respiration in bacteria.

SUBMITTER: Alberge F

PROVIDER: S-EPMC4466248 | biostudies-literature | 2015 Jun

REPOSITORIES: biostudies-literature

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Dynamic subcellular localization of a respiratory complex controls bacterial respiration.

Alberge François F Espinosa Leon L Seduk Farida F Sylvi Léa L Toci René R Walburger Anne A Magalon Axel A

eLife 20150616

Respiration, an essential process for most organisms, has to optimally respond to changes in the metabolic demand or the environmental conditions. The branched character of their respiratory chains allows bacteria to do so by providing a great metabolic and regulatory flexibility. Here, we show that the native localization of the nitrate reductase, a major respiratory complex under anaerobiosis in Escherichia coli, is submitted to tight spatiotemporal regulation in response to metabolic conditio ...[more]

PMID: 26077726

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