Distinct Roles of Shewanella oneidensis Thioredoxin in Regulation of Cellular Responses to Hydrogen and Organic Peroxides

Authors:
Open Access
Publisher website
Google Scholar
Abstract
The Trx and Grx systems are deeply involved in bacterial responses to H 2 O 2 -induced oxidative stress. However, little is known about their roles in response to other ROS, such as organic peroxides (OPs). In this study, we used S. oneidensis as a research model to investigate the interplay between Trx/Grx and OxyR/OhrR. We show that Trxs mediate the redox status of transcriptional OP-responding regulator OhrR. Although none of the trx or grx genes are directly controlled by OxyR or OhrR, expression of trxA and trxC is induced by tert -butyl hydroperoxide ( t -BHP). We further show that the trxA and trxC genes respond to effects of glutathione (GSH) depletion rather than oxidation. These findings underscore the particular importance of Trx in the bacterial OP stress response.
Funding Information
  • Natural Science Foundation of Zhejiang Province (LZ17C010001)

This publication has 52 references indexed in Scilit: