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- W2097099571 endingPage "5503" @default.
- W2097099571 startingPage "5495" @default.
- W2097099571 abstract "ABSTRACT The ability to maintain intracellular concentrations of toxic reactive oxygen species (ROS) within safe limits is essential for all aerobic life forms. In bacteria, as well as other organisms, ROS are produced during the normal course of aerobic metabolism, necessitating the constitutive expression of ROS scavenging systems. However, bacteria can also experience transient high-level exposure to ROS derived either from external sources, such as the host defense response, or as a secondary effect of other seemingly unrelated environmental stresses. Consequently, transcriptional regulators have evolved to sense the levels of ROS and coordinate the appropriate oxidative stress response. Three well-studied examples of these are the peroxide responsive regulators OxyR, PerR, and OhrR. OxyR and PerR are sensors of primarily H 2 O 2 , while OhrR senses organic peroxide (ROOH) and sodium hypochlorite (NaOCl). OxyR and OhrR sense oxidants by means of the reversible oxidation of specific cysteine residues. In contrast, PerR senses H 2 O 2 via the Fe-catalyzed oxidation of histidine residues. These transcription regulators also influence complex biological phenomena, such as biofilm formation, the evasion of host immune responses, and antibiotic resistance via the direct regulation of specific proteins." @default.
- W2097099571 created "2016-06-24" @default.
- W2097099571 creator A5020798725 @default.
- W2097099571 creator A5041173447 @default.
- W2097099571 date "2012-10-15" @default.
- W2097099571 modified "2023-10-16" @default.
- W2097099571 title "Peroxide-Sensing Transcriptional Regulators in Bacteria" @default.
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