Distinct H(2)O(2)-Scavenging System in Yersinia pseudotuberculosis: KatG and AhpC Act Together to Scavenge Endogenous Hydrogen Peroxide.
Distinct H(2)O(2)-Scavenging System in Yersinia pseudotuberculosis: KatG and AhpC Act Together to Scavenge Endogenous Hydrogen Peroxide.
复制标题
假结核耶尔森菌独特的 H2O2 清除系统:KatG 和 AhpC 共同清除内源性过氧化氢
DOI:
10.3389/fmicb.2021.626874
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发表时间:
2021
影响因子:
5.2
通讯作者:
Gao H
中科院分区:
文献类型:
--
作者:
Wan F;Feng X;Yin J;Gao H
To colonize in the digestive tract of animals and humans, Yersinia pseudotuberculosis has to deal with reactive oxygen species (ROS) produced by host cells and microbiota. However, an understanding of the ROS-scavenging systems and their regulation in this bacterium remains largely elusive. In this study, we identified OxyR as the master transcriptional regulator mediating cellular responses to hydrogen peroxide (H2O2) in Y. pseudotuberculosis through genomics and transcriptomics analyses. OxyR activates transcription of diverse genes, especially the core members of its regulon, including those encoding catalases, peroxidases, and thiol reductases. The data also suggest that sulfur species and manganese may play a particular role in the oxidative stress response of Y. pseudotuberculosis. Among the three H2O2-scavenging systems in Y. pseudotuberculosis, catalase/peroxidase KatE functions as the primary scavenger for high levels of H2O2; NADH peroxidase alkyl hydroperoxide reductase (AhpR) and catalase KatG together are responsible for removing low levels of H2O2. The simultaneous loss of both AhpC (the peroxidatic component of AhpR) and KatG results in activation of OxyR. Moreover, we found that AhpC, unlike its well-characterized Escherichia coli counterpart, has little effect on protecting cells against toxicity of organic peroxides. These findings provide not only novel insights into the structural and functional diversity of bacterial H2O2-scavenging systems but also a basic understanding of how Y. pseudotuberculosis copes with oxidative stress.
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影响因子:
3.6
作者:
Anjem A;Varghese S;Imlay JA
通讯作者:
Imlay JA
影响因子:
4.4
作者:
Feng, Xue;Sun, Weining;Gao, Haichun
通讯作者:
Gao, Haichun
DOI:
10.1073/pnas.91.15.7017
发表时间:
1994-07-19
影响因子:
11.1
作者:
CHAE, HZ;ROBISON, K;RHEE, SG
通讯作者:
RHEE, SG
影响因子:
3.2
作者:
Antelmann, H;Engelmann, S;Hecker, M
通讯作者:
Hecker, M
影响因子:
10.5
作者:
Imlay JA
通讯作者:
Imlay JA