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- W2020804980 abstract "Protein-protein interactions between sigma factor σ(R) and its corresponding zinc-binding anti-sigma (ZAS) protein RsrA trigger the thioredoxin system for maintaining cellular redox homeostasis in S. coelicolor. RsrA bound to zinc associates with σ(R), inhibiting its transcriptional activity in a reducing environment. During disulfide stress it forms intramolecular disulfide bonds, leading to zinc release and dissociation from σ(R), which initiates transcription to produce reductase and thioredoxin. We designed a fluorescence resonance energy transfer (FRET) based system for monitoring protein-protein interactions between σ(R) and RsrA to further understand how this redox switch regulates the thioredoxin system in S. coelicolor in response to its redox environment, especially various reactive oxygen species (ROS) derived from different metabolic pathways, and clarify the different response mechanisms between Zn-RsrA and apo-RsrA. By the use of the FRET approach described here, we showed that zinc protected thiols in RsrA and causes the σ(R)-RsrA complex to form a more compact structure. This system was also utilized to detect changes in redox status induced by ROS and diamide in real time in E. coli cells." @default.
- W2020804980 created "2016-06-24" @default.
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- W2020804980 date "2014-03-20" @default.
- W2020804980 modified "2023-09-27" @default.
- W2020804980 title "FRET-Based System for Probing Protein-Protein Interactions between σR and RsrA from Streptomyces Coelicolor in Response to the Redox Environment" @default.
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- W2020804980 doi "https://doi.org/10.1371/journal.pone.0092330" @default.
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