Bacterial defenses against oxidative stress

Storz, Gisela; Tartaglia, Louis A.; Farr, Spencer B.; Ames, Bruce N.

doi:10.1016/0168-9525(90)90278-e

Cited by 313 publications

(237 citation statements)

References 26 publications

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“…6a). This result further confirmed that catalase HPI encoded by the katG gene was H 2 O 2 inducible (Storz et al, 1990), while the catalase HPII encoded by katE was H 2 O 2 independent. For BW25113, the resistance to PEC inactivation increased after H 2 O 2 pre-incubation; higher [H 2 O 2 ] resulted in more resistant bacteria (Fig.…”

Section: H 2 O 2 Pre-incubation Elevated Bacterial Resistance To Pecsupporting

confidence: 77%

“…The expression of gene sodC is controlled by another regulator RpoS which is related with stationary phase and general stress, and to our knowledge, the regulation of sodB gene is not elucidated (Storz et al, 1990;Chiang and Schellhorn, 2012). Similarly, there are two catalases in E. coli: hydroperoxidase I (HPI) and hydroperoxidase II (HPII), and they are encoded by katG and katE, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Unveiling the photoelectrocatalytic inactivation mechanism of Escherichia coli : Convincing evidence from responses of parent and anti-oxidation single gene knockout mutants

Sun

et al. 2016

Water Research

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Section: H 2 O 2 Pre-incubation Elevated Bacterial Resistance To Pecsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Unveiling the photoelectrocatalytic inactivation mechanism of Escherichia coli : Convincing evidence from responses of parent and anti-oxidation single gene knockout mutants

Sun

et al. 2016

Water Research

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“…34 The increased ROSs, such as 28,35,36 Thus, the SOD and CAT activities during bactericidal treatment were also monitored, and the results are shown in Figures 2b and 2c. For the PEC process, the decrease of both SOD and CAT activities was observed after 10 min of inactivation and continued thereafter.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Systematic Approach to In-Depth Understanding of Photoelectrocatalytic Bacterial Inactivation Mechanisms by Tracking the Decomposed Building Blocks

Sun

Nie

et al. 2014

Environ. Sci. Technol.

184

104

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A systematic approach was developed to understand, in-depth, the mechanisms involved during the inactivation of bacterial cells using photoelectrocatalytic (PEC) processes with Escherichia coli K-12 as the model microorganism. The bacterial cells were found to be inactivated and decomposed primarily due to attack from photogenerated H 2 O 2 . Extracellular reactive oxygen species (ROSs), such as H 2 O 2 , may penetrate into the bacterial cell and cause dramatically elevated intracellular ROSs levels, which would overwhelm the antioxidative capacity of bacterial protective enzymes such as superoxide dismutase and catalase. The activities of these two enzymes were found to decrease due to the ROSs attacks during PEC inactivation. Bacterial cell wall damage was then observed, including loss of cell membrane integrity and increased permeability, followed by the decomposition of cell envelope (demonstrated by scanning electronic microscope images). One of the bacterial building blocks, protein, was found to be oxidatively damaged due to the ROSs attacks, as well. Leakage of cytoplasm and biomolecules (bacterial building blocks such as proteins and nucleic acids) were evident during prolonged PEC inactivation process. The leaked cytoplasmic substances and cell debris could be further degraded and, ultimately, mineralized with prolonged PEC treatment.

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“…The genetic response to oxidative stress has been studied intensively in bacteria [reviewed in Refs. [14][15][16]. In Escherichia coli.…”

Section: The Oxidant Stress Responsementioning

confidence: 99%

Redox signalling by transcription factors NF-κB and AP-1 in lymphocytes

Schulze‐Osthoff

Łos

Baeuerle

1995

Biochemical Pharmacology

253

146

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Bacterial defenses against oxidative stress

Cited by 313 publications

References 26 publications

Unveiling the photoelectrocatalytic inactivation mechanism of Escherichia coli : Convincing evidence from responses of parent and anti-oxidation single gene knockout mutants

Unveiling the photoelectrocatalytic inactivation mechanism of Escherichia coli : Convincing evidence from responses of parent and anti-oxidation single gene knockout mutants

Systematic Approach to In-Depth Understanding of Photoelectrocatalytic Bacterial Inactivation Mechanisms by Tracking the Decomposed Building Blocks

Redox signalling by transcription factors NF-κB and AP-1 in lymphocytes

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