Subtopic Deep Dive

Peroxiredoxin Redox Regulation
Research Guide

What is Peroxiredoxin Redox Regulation?

Peroxiredoxin redox regulation examines the hyperoxidation, oligomerization, and thioredoxin-dependent recycling of peroxiredoxins as key H2O2 scavengers and redox floodgate chaperones in cellular homeostasis.

Peroxiredoxins (Prxs) reduce H2O2 via their peroxidatic cysteine, which undergoes hyperoxidation to sulfinic acid under high ROS, triggering decamer formation and chaperone activity (Arnér and Holmgren, 2000; Lu and Holmgren, 2013). Thioredoxin systems recycle oxidized Prxs, maintaining redox balance amid mitochondrial ROS production (Murphy, 2008). Over 10 papers in provided lists link Prx mechanisms to ROS signaling and oxidative stress pathologies.

Curated Papers

Key Challenges

Why It Matters

Peroxiredoxin redox regulation determines H2O2 floodgate thresholds, preventing oxidative damage while enabling redox signaling in pathologies like aging and cancer (Murphy, 2008; Ray et al., 2012). Dysregulated Prx hyperoxidation contributes to mitochondrial stress and cell death, as seen in disease models (Ott et al., 2007). Arnér and Holmgren (2000) highlight thioredoxin-Prx interplay in antioxidant hierarchies, informing therapeutic targeting of ROS homeostasis (Sies, 2017).

Key Research Challenges

Quantifying hyperoxidation kinetics

Measuring rates of Prx sulfenylation versus sulfinic acid formation remains difficult due to transient intermediates. Ray et al. (2012) note variability across cell types. Lu and Holmgren (2013) call for improved spectroscopic assays.

Decamer chaperone function validation

Linking Prx oligomerization to protein protection under oxidative stress requires in vivo evidence. Arnér and Holmgren (2000) describe structural shifts, but functional impacts vary. Finkel (2011) emphasizes signaling context needs.

Thioredoxin recycling efficiency

Assessing Prx reduction by Trx systems under fluctuating ROS levels challenges throughput models. Murphy (2008) details mitochondrial ROS sources affecting this cycle. Sies (2017) identifies eustress thresholds as unresolved.

Essential Papers

How mitochondria produce reactive oxygen species

Michael P. Murphy · 2008 · Biochemical Journal · 7.8K citations

The production of ROS (reactive oxygen species) by mammalian mitochondria is important because it underlies oxidative damage in many pathologies and contributes to retrograde redox signalling from ...

Reactive oxygen species (ROS) homeostasis and redox regulation in cellular signaling

Paul D. Ray, Bowen Huang, Yoshiaki Tsuji · 2012 · Cellular Signalling · 4.3K citations

Physiological functions of thioredoxin and thioredoxin reductase

Elias S.J. Arnér, Arne Holmgren · 2000 · European Journal of Biochemistry · 2.5K citations

Thioredoxin, thioredoxin reductase and NADPH, the thioredoxin system, is ubiquitous from Archea to man. Thioredoxins, with a dithiol/disulfide active site (CGPC) are the major cellular protein disu...

The Chemistry of Reactive Oxygen Species (ROS) Revisited: Outlining Their Role in Biological Macromolecules (DNA, Lipids and Proteins) and Induced Pathologies

Celia Andrés, José Manuel Pérez de la Lastra, Francisco J. Plou et al. · 2021 · International Journal of Molecular Sciences · 2.3K citations

Living species are continuously subjected to all extrinsic forms of reactive oxidants and others that are produced endogenously. There is extensive literature on the generation and effects of react...

Signal transduction by reactive oxygen species

Toren Finkel · 2011 · The Journal of Cell Biology · 2.2K citations

Although historically viewed as purely harmful, recent evidence suggests that reactive oxygen species (ROS) function as important physiological regulators of intracellular signaling pathways. The s...

ROS in cancer therapy: the bright side of the moon

Bruno Perillo, Marzia Di Donato, Antonio Pezone et al. · 2020 · Experimental & Molecular Medicine · 2.0K citations

Mitochondria, oxidative stress and cell death

Martin Ott, Vladimir Gogvadze, Sten Orrenius et al. · 2007 · APOPTOSIS · 1.9K citations

Reading Guide

Foundational Papers

Start with Arnér and Holmgren (2000) for Trx-Prx basics (2502 cites), then Murphy (2008) for ROS sources (7798 cites), and Ray et al. (2012) for signaling homeostasis (4257 cites).

Recent Advances

Study Lu and Holmgren (2013) for Trx systems (1947 cites) and Sies (2017) for H2O2 eustress (1945 cites) to grasp modern floodgate concepts.

Core Methods

Core techniques: peroxide assays for kinetics, thiol-trapping for intermediates, oligomer gels for structures, and flux models for recycling (Finkel, 2011; Ott et al., 2007).

How PapersFlow Helps You Research Peroxiredoxin Redox Regulation

Discover & Search

Research Agent uses searchPapers and exaSearch to find Prx regulation papers like 'The thioredoxin antioxidant system' by Lu and Holmgren (2013), then citationGraph reveals connections to Arnér and Holmgren (2000) and Murphy (2008) for thioredoxin-Prx networks.

Analyze & Verify

Analysis Agent applies readPaperContent to extract hyperoxidation mechanisms from Ray et al. (2012), verifies claims via verifyResponse (CoVe) against Lu and Holmgren (2013), and runs PythonAnalysis for kinetic modeling of ROS thresholds with GRADE scoring on evidence strength.

Synthesize & Write

Synthesis Agent detects gaps in Prx oligomerization signaling between Finkel (2011) and Sies (2017), while Writing Agent uses latexEditText, latexSyncCitations, and latexCompile to generate review sections with exportMermaid diagrams of redox cycles.

Use Cases

"Model Prx hyperoxidation rates from thioredoxin papers"

Research Agent → searchPapers → Analysis Agent → runPythonAnalysis (NumPy/pandas simulation of sulfenylation kinetics from Lu and Holmgren 2013 data) → matplotlib plot of ROS thresholds.

"Draft LaTeX review on Prx redox floodgates"

Synthesis Agent → gap detection (Murphy 2008 + Sies 2017) → Writing Agent → latexEditText → latexSyncCitations → latexCompile → PDF with Prx cycle diagram.

"Find code for Prx oligomerization simulations"

Research Agent → citationGraph (Arnér 2000) → Code Discovery → paperExtractUrls → paperFindGithubRepo → githubRepoInspect → Python scripts for decamer dynamics.

Automated Workflows

Deep Research workflow scans 50+ papers via searchPapers on Prx hyperoxidation, structures reports with GRADE-verified hierarchies from Murphy (2008) to Sies (2017). DeepScan applies 7-step CoVe analysis to validate Trx-Prx kinetics in Ray et al. (2012). Theorizer generates hypotheses on floodgate failures linking Ott et al. (2007) cell death to aging.

Try Doxa for Peroxiredoxin Redox Regulation Research

Frequently Asked Questions

What defines peroxiredoxin redox regulation?

It covers Prx H2O2 reduction, hyperoxidation to sulfinic acid, oligomerization into chaperones, and thioredoxin recycling (Arnér and Holmgren, 2000; Lu and Holmgren, 2013).

What methods study Prx mechanisms?

Kinetic assays track cysteine oxidation, MS proteomics detect sulfinic acids, and structural cryo-EM reveals decamers; Trx systems use NADPH reduction assays (Murphy, 2008; Ray et al., 2012).

What are key papers on this topic?

Foundational: Arnér and Holmgren (2000, 2502 cites) on Trx functions; Lu and Holmgren (2013, 1947 cites) on antioxidant systems; Murphy (2008, 7798 cites) on mitochondrial ROS sources.

What open problems exist?

Unresolved: tissue-specific Prx thresholds, in vivo chaperone roles under eustress, and therapeutic modulation of hyperoxidation (Sies, 2017; Finkel, 2011).