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• W2976302290 abstract "Abstract In γ-proteobacterial species, such as Escherichia coli , the Arc (anoxic redox control) two-component system plays a major role in mediating the metabolic transition from aerobiosis to anaerobiosis, and thus is crucial for anaerobic growth but dispensable for aerobic growth. In Shewanella oneidensis , a bacterium renowned for respiratory versatility, Arc ( So Arc) primarily affects aerobic growth. To date, how this occurs has remained largely unknown although the growth defect resulting from the loss of DNA-binding response regulator So ArcA is tryptone-dependent. In this study, we demonstrated that the growth defect is in part linked to utilization of oligopeptides and di-tripeptides, and peptide uptake but not peptide degradation is significantly affected by the So ArcA loss. A systematic characterization of major small peptide uptake systems manifests that ABC peptide transporter Sap and four proton-dependent oligopeptide transporters (POTs) are responsible for transport of oligopeptides and di-tripeptides respectively. Among them, Sap and DtpA (one of POTs) are responsive to the SoarcA mutation but only dtpA is under the direct control of So ArcA. We further showed that both Sap and DtpA, when overproduced, improve growth of the SoarcA mutant. While the data firmly establish a link between transport of oligopeptides and di-tripeptides and the SoarcA mutation, other yet-unidentified factors are implicated in the growth defect resulting from the So ArcA loss." @default.
• W2976302290 created "2019-10-03" @default.
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• W2976302290 date "2019-09-25" @default.
• W2976302290 modified "2023-09-24" @default.
• W2976302290 title "Transcriptional regulator ArcA mediates expression of oligopeptide transport systems both directly and indirectly in Shewanella oneidensis" @default.
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• W2976302290 doi "https://doi.org/10.1038/s41598-019-50201-4" @default.
• W2976302290 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6761289" @default.
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