Article
Cross-talk between cognate and noncognate RpoE sigma factors and Zn(2+)-binding anti-sigma factors regulates photooxidative stress response in Azospirillum brasilense.
Antioxidants & redox signaling - 1 Jan 2014
Gupta Namrata, Gupta Ankush, Kumar Santosh, Mishra Rajeev, Singh Chhaya, Tripathi Anil Kumar
Abstract excerpt
AIMS: Azospirillum brasilense harbors two redox-sensitive Zinc-binding anti-sigma (ZAS) factors (ChrR1 and ChrR2), which negatively regulate the activity of their cognate extra-cytoplasmic function (ECF) σ factors (RpoE1 and RpoE2) by occluding their binding to the core enzyme. Both pairs of RpoE-ChrR control responses to photooxidative stress. The aim of this study was to investigate whether the two RpoE-ChrR...
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