Utilizing Natural and Engineered Peroxiredoxins As Intracellular Peroxide Reporters

Molecules and Cells
Koen Van Laer, Tobias P Dick

Abstract

It is increasingly apparent that nature evolved peroxiredoxins not only as H2O2 scavengers but also as highly sensitive H2O2 sensors and signal transducers. Here we ask whether the H2O2 sensing role of Prx can be exploited to develop probes that allow to monitor intracellular H2O2 levels with unprecedented sensitivity. Indeed, simple gel shift assays visualizing the oxidation of endogenous 2-Cys peroxiredoxins have already been used to detect subtle changes in intracellular H2O2 concentration. The challenge however is to create a genetically encoded probe that offers real-time measurements of H2O2 levels in intact cells via the Prx oxidation state. We discuss potential design strategies for Prx-based probes based on either the redox-sensitive fluorophore roGFP or the conformation-sensitive fluorophore cpYFP. Furthermore, we outline the structural and chemical complexities which need to be addressed when using Prx as a sensing moiety for H2O2 probes. We suggest experimental strategies to investigate the influence of these complexities on probe behavior. In doing so, we hope to stimulate the development of Prx-based probes which may spearhead the further study of cellular H2O2 homeostasis and Prx signaling.

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Citations

Feb 3, 2016·Molecules and Cells·Sue Goo Rhee
Mar 16, 2017·IUBMB Life·Yuta HatoriReiko Akagi
Jun 8, 2017·Antioxidants & Redox Signaling·Sue Goo RheeDongmin Kang
Aug 7, 2020·Antioxidants·Emilia PedoneDanila Limauro

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Methods Mentioned

BETA
biosensors
FRET
acetylation
transfection

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