ArticleNucleic acids research2025
Cu2+ mediates the oxidation of the transcription factor MscA to regulate the antioxidant defense of mycobacteria.
Article in Nucleic acids research, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- CueO Possesses Copper Detoxification Activity Linking Bacterial Virulence and Drug Resistance in Brucella.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2026Article
- Copper tannic acid coordination nanosheet as a potent in-situ antibiotic sustained-release carrier for chronic osteomyelitis.Journal of materials science. Materials in medicine · 2025Article
- Synergistic dual chemophysical FeCu-MOF scaffold with PEMF stimulation drives angiogenic-osteogenic coupling for bone regeneration.Materials today. Bio · 2025Article
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Authors and funding
7 authors.
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Abstract
Copper (Cu), a trace element with redox activity, is both essential and toxic to living organisms. Its redox properties make it a cofactor for a variety of proteins, but it also causes oxidative stress, hence the need to maintain intracellular copper homeostasis. However, the role of copper in the regulation of antioxidant defense in bacteria remains unclear, and the involved transcription factors remain to be explored. In this study, we identified a novel transcription factor, MscA, that responded directly to Cu2+ to regulate the antioxidant defense of mycobacteria. Cu2+ directly bound to MscA to mediate oxidation and inhibit the DNA binding activity of MscA, subsequently downregulating the expression of antioxidant gene cluster to increase the accumulation of reactive oxygen species in mycobacteria, ultimately leading to oxidative damage to mycobacteria. Therefore, we firstly reported that the Cu2+ responsive transcription factor regulated the antioxidant defense in bacteria. This finding firstly and directly links the function of Cu2+ to the antioxidant defense of bacteria, and provides a new insight into bacterial antioxidant defense.
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