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- W842049648 abstract "This chapter highlights some of the advances on both the molecular mechanisms of oxygen (O2) sensing and the biological responses to O2 limitation. In the first part of the chapter, the major regulators that control expression of anaerobic respiratory pathways are described, with focus on the well studied examples from Escherichia coli K-12. Many facultative bacteria have anaerobic lifestyles that depend on pathways not found in enteric bacteria. A section reviews the master regulators of these anaerobic lifestyles, describing how their activity responds to O2 deprivation, highlighting commonalities and differences to the responses described for enterobacteria, and placing them into a metabolic context of the systems they control. A recurring theme in the review is that multiple transcription factors collaborate in a given organism to control gene expression in response to changes in O2. In E. coli, decreased expression of the genes encoding aerobic respiratory functions under anaerobic growth conditions is largely mediated by the aerobic respiration control (Arc) A and ArcB two-component system. Regulation of anaerobic respiration in the γ-proteobacterium Shewanella oneidensis has attracted great interest because of the broad diversity of electron acceptors (>14) that these bacteria can respire, including metal oxides. The use of cofactors such as flavins, heme, and [Fe-S] clusters generally sense O2 directly, using chemistry reflecting their well-described roles in biological reactions." @default.
- W842049648 created "2016-06-24" @default.
- W842049648 creator A5045417376 @default.
- W842049648 creator A5085149040 @default.
- W842049648 date "2014-04-09" @default.
- W842049648 modified "2023-09-24" @default.
- W842049648 title "Global Responses of Bacteria to Oxygen Deprivation" @default.
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