GO:0015038 glutathione disulfide oxidoreductase activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0015038 describes the molecular function of catalyzing the reaction 2 glutathione + electron acceptor = glutathione disulfide + electron donor, a central redox reaction in cellular antioxidant defense.
• Enzymes with this activity, such as glutathione reductase and glutaredoxins, maintain the cellular ratio of reduced to oxidized glutathione (GSH/GSSG), which is critical for redox homeostasis.
• Glutathione disulfide oxidoreductase activity is essential in platelets, erythrocytes, kidney, and reproductive tissues, where it protects against oxidative stress [2,5,7,8].
• The activity can be modulated by electrophiles, alkylation, and changes in glutathione biosynthesis, linking it to xenobiotic responses and disease.
• Dysregulation of this activity is implicated in renal transplant injury, pregnancy complications, and metabolic disorders [5,8].
• CRISPR-based models (knockout, point mutation, knock-in, overexpression) enable precise dissection of genes encoding glutathione disulfide oxidoreductases in health and disease [1,4].
Description
Glutathione disulfide oxidoreductase activity (GO:0015038) is a molecular function that catalyzes the reversible reduction of glutathione disulfide (GSSG) to two molecules of reduced glutathione (GSH), coupled to the oxidation of an electron donor. This reaction is fundamental to maintaining the cellular redox environment, as the GSH/GSSG ratio serves as a key indicator of oxidative stress and redox signaling. Enzymes exhibiting this activity, including glutathione reductase and glutaredoxins, are found across prokaryotes and eukaryotes and are essential for protecting cells from oxidative damage [1,4]. Researchers study GO:0015038 to understand how cells counteract reactive oxygen species, regulate protein thiol status, and respond to electrophilic stress. The activity has been detected on the surface of platelets, in kidney cortex, and in erythrocytes of trained animals, highlighting its broad physiological relevance [2,3,7]. In clinical contexts, altered glutathione disulfide oxidoreductase activity has been associated with renal transplant outcomes and pregnancy complications, underscoring its potential as a biomarker and therapeutic target [5,8]. This article provides a comprehensive overview of the definition, mechanism, key genes, disease links, and research methods for GO:0015038, with a focus on how CRISPR-based models can accelerate discovery.
glutathione disulfide oxidoreductase activity At A Glance
| GO ID | GO:0015038 |
|---|---|
| GO term | glutathione disulfide oxidoreductase activity |
| Ontology | molecular_function |
| Synonym | glutaredoxin, glutathione disulphide oxidoreductase activity, glutathione oxidoreductase activity |
| Major function | Catalyzes the reduction of glutathione disulfide to reduced glutathione, maintaining cellular redox balance |
| Reaction | 2 glutathione + electron acceptor = glutathione disulfide + electron donor |
| Cofactors | NADPH (for glutathione reductase), FAD, or other electron donors depending on the enzyme |
| Subcellular location | Cytoplasm, mitochondria, and extracellular surface (e.g., platelets) |
| Related diseases | Renal transplant injury, pregnancy complications, oxidative stress-related disorders |
What Is GO:0015038?
According to the Gene Ontology, GO:0015038 glutathione disulfide oxidoreductase activity is defined as the catalysis of the reaction: 2 glutathione + electron acceptor = glutathione disulfide + electron donor. In other words, it is the enzymatic activity that interconverts reduced glutathione (GSH) and glutathione disulfide (GSSG) while transferring electrons to or from an acceptor/donor. This activity is synonymous with glutaredoxin activity, glutathione disulphide oxidoreductase activity, and glutathione oxidoreductase activity. It is a molecular function that plays a central role in redox homeostasis and antioxidant defense [1,4].
Why Is glutathione disulfide oxidoreductase activity Important in Cell Biology?
Glutathione disulfide oxidoreductase activity is a cornerstone of cellular antioxidant defense and redox signaling. By maintaining a high ratio of reduced to oxidized glutathione, enzymes with this activity protect proteins, lipids, and DNA from oxidative damage, modulate immune responses, and influence cell proliferation and apoptosis [1,4]. Its presence on platelet surfaces suggests a role in thrombosis and hemostasis. In clinical settings, altered activity has been linked to renal transplant dysfunction and poor pregnancy outcomes, making it a potential biomarker and therapeutic target [5,8]. Understanding this activity is therefore essential for researchers in redox biology, pharmacology, and translational medicine.
• Maintains cellular redox homeostasis by regenerating reduced glutathione (GSH) from glutathione disulfide (GSSG).
• Protects cells from oxidative stress caused by reactive oxygen species and electrophiles.
• Modulates platelet function and thrombosis through surface-associated activity.
• Influences renal transplant outcomes and kidney function.
• Affects reproductive health and pregnancy, with changes linked to sleep quality.
• Regulates prostaglandin metabolism in kidney cortex.
• Serves as a biomarker for oxidative stress in trained animals and human diseases.
• Provides a target for CRISPR-based functional studies of redox genes [1,4].
• Plays a role in xenobiotic detoxification and drug metabolism.
• Contributes to the antioxidant defense system in erythrocytes and other blood cells.
What Happens During glutathione disulfide oxidoreductase activity?
Substrate Binding and Electron Transfer
In simple terms: The enzyme grabs glutathione disulfide and an electron donor, then passes electrons to break the disulfide bond.
The catalytic cycle begins with the binding of glutathione disulfide (GSSG) and an electron donor, such as NADPH, to the enzyme active site. For glutathione reductase, NADPH reduces a flavin adenine dinucleotide (FAD) cofactor, which then transfers electrons to a redox-active disulfide bond in the enzyme, ultimately reducing GSSG to two GSH molecules. This process involves a mixed disulfide intermediate between glutathione and the enzyme, as demonstrated for yeast glutathione reductase.
Formation of Mixed Disulfide Intermediate
In simple terms: A temporary bond forms between the enzyme and one glutathione molecule before the final product is released.
During catalysis, a mixed disulfide intermediate is formed between the enzyme's cysteine residue and one molecule of glutathione. This intermediate is a major form of the enzyme in the cell and is essential for the catalytic mechanism. The formation and resolution of this intermediate ensure efficient electron transfer and substrate turnover.
Release of Reduced Glutathione
In simple terms: The enzyme releases two molecules of reduced glutathione, ready to neutralize harmful oxidants.
Following the reduction of the disulfide bond, two molecules of reduced glutathione (GSH) are released from the active site. These GSH molecules can then participate in various cellular processes, including detoxification of reactive oxygen species and maintenance of protein thiol status. The enzyme returns to its oxidized state, ready for another catalytic cycle.
Regulation by Cellular Redox State
In simple terms: The enzyme's activity changes depending on how oxidized or reduced the cell is.
The activity of glutathione disulfide oxidoreductases is tightly regulated by the cellular redox environment. Electrophiles can modulate glutathione reductase activity via alkylation and upregulation of glutathione biosynthesis, thereby affecting the enzyme's function. Additionally, the availability of NADPH and the GSH/GSSG ratio influence the overall flux through this pathway.
Key Genes Involved in GO:0015038 glutathione disulfide oxidoreductase activity
The following genes encode proteins that exhibit glutathione disulfide oxidoreductase activity or directly regulate it, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| GSR | Glutathione reductase; reduces GSSG to GSH using NADPH | Central enzyme for redox homeostasis; target for oxidative stress studies |
| GLRX | Glutaredoxin; catalyzes GSH-dependent reduction of disulfides | Involved in protein thiol regulation and redox signaling |
| GLRX2 | Mitochondrial glutaredoxin; protects against oxidative stress | Linked to mitochondrial function and apoptosis |
| GLRX3 | Glutaredoxin 3; iron-sulfur cluster assembly | Roles in iron metabolism and cell proliferation |
| GLRX5 | Glutaredoxin 5; iron-sulfur cluster biogenesis | Associated with sideroblastic anemia |
| TXN | Thioredoxin; reduces disulfides in proteins | Cross-talk with glutathione system |
| TXN2 | Mitochondrial thioredoxin; antioxidant defense | Protects mitochondria from oxidative damage |
| G6PD | Glucose-6-phosphate dehydrogenase; generates NADPH | Provides reducing power for glutathione reductase |
| GCLM | Glutamate-cysteine ligase modifier subunit; GSH synthesis | Regulates glutathione biosynthesis |
| GCLC | Glutamate-cysteine ligase catalytic subunit; GSH synthesis | Rate-limiting enzyme for GSH production |
| SLC7A11 | Cystine/glutamate antiporter; cysteine uptake for GSH synthesis | Modulates glutathione levels and ferroptosis |
| NFE2L2 | Nrf2; transcription factor regulating antioxidant genes | Master regulator of oxidative stress response |
| PRDX1 | Peroxiredoxin 1; reduces peroxides using thioredoxin | Interacts with glutathione system |
| GPX1 | Glutathione peroxidase 1; reduces H2O2 using GSH | Consumes GSH, affecting GSH/GSSG ratio |
| GSTP1 | Glutathione S-transferase pi; detoxifies electrophiles | Uses GSH for xenobiotic metabolism |
| SOD1 | Superoxide dismutase 1; converts superoxide to H2O2 | Upstream of glutathione system |
| CAT | Catalase; decomposes H2O2 | Complementary antioxidant enzyme |
How Is glutathione disulfide oxidoreductase activity Regulated?
Glutathione disulfide oxidoreductase activity is regulated at multiple levels. Electrophiles can directly alkylate glutathione reductase, modulating its activity, and also induce the upregulation of glutathione biosynthesis genes via the Nrf2/ARE pathway. The availability of NADPH, primarily generated by the pentose phosphate pathway enzyme G6PD, controls the reducing capacity of glutathione reductase. Additionally, the expression of glutaredoxins and thioredoxins is influenced by oxidative stress and inflammatory signals. In erythrocytes, training status affects the activity of glutathione-metabolizing enzymes, indicating physiological regulation. Sleep quality has also been associated with changes in the glutathione system in pregnant women.
glutathione disulfide oxidoreductase activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| GSR | Renal transplant injury; oxidative stress | Knockout or point mutation in renal cell lines |
| GLRX | Neurodegeneration; redox imbalance | Overexpression or knockout in neuronal cells |
| G6PD | Hemolytic anemia; NADPH deficiency | Knock-in of deficiency mutations in erythroid cells |
| NFE2L2 | Cancer; chemoresistance | Knockout in cancer cell lines to study antioxidant response |
| GPX1 | Cardiovascular disease; oxidative stress | Overexpression in endothelial cells |
Renal Transplant Injury
Glutathione peroxidase, glutathione transferase, and glutathione reductase activities were studied in renal transplants, revealing changes that may contribute to graft dysfunction and oxidative stress. Monitoring these activities could help assess transplant outcomes.
Pregnancy Complications and Sleep Quality
In pregnant women, the activity of the glutathione unit of the antioxidant system varies with sleep quality, suggesting that redox imbalance may contribute to pregnancy-related disorders. This highlights the importance of glutathione disulfide oxidoreductase activity in reproductive health.
Prostaglandin Metabolism in Kidney
Glutathione disulfide inhibits prostaglandin delta 13 reductase activity in rabbit kidney cortex, linking glutathione disulfide oxidoreductase activity to inflammatory mediator regulation.
Oxidative Stress in Metabolic and Cardiovascular Disease
Electrophiles modulate glutathione reductase activity via alkylation and upregulation of glutathione biosynthesis, implicating this activity in xenobiotic responses and diseases associated with oxidative stress.
From glutathione disulfide oxidoreductase activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of GSR affect cellular redox balance? | GSR knockout cell line (e.g., HeLa, HEK293) |
| How do point mutations in GLRX alter catalytic activity? | Point mutation knock-in of GLRX active-site cysteines |
| Can overexpression of G6PD rescue GSR deficiency? | Overexpression of G6PD in GSR knockout cells |
| What is the role of NFE2L2 in regulating glutathione genes? | NFE2L2 knockout with RNA-seq and ChIP-seq |
| Does platelet surface glutathione reductase activity require GSR? | Platelet-specific GSR knockout mouse |
| How does sleep quality affect glutathione system in pregnancy? | Patient-derived cells with sleep intervention |
How to Study the glutathione disulfide oxidoreductase activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| NADPH oxidation assay | Glutathione reductase activity | Kinetic studies of purified enzymes |
| Intracellular activity assay | Glutathione-dependent oxidoreductase activity in live cells | Screening of inhibitors/activators |
| CRISPR knockout screen | Genes required for redox homeostasis | Discovery of novel regulators |
| Redox proteomics | Thiol oxidation states of proteins | Identifying targets of glutathionylation |
| RNA-seq | Transcriptional changes in antioxidant genes | Response to oxidative stress |
| Immunofluorescence | Subcellular localization of enzymes | Platelet surface expression |
| Clinical enzyme activity assays | Glutathione peroxidase, transferase, reductase in biopsies | Renal transplant monitoring |
| Glutathione status measurement | GSH/GSSG ratio in erythrocytes | Training and sleep studies [7,8] |
Enzymatic Activity Assays
Direct measurement of glutathione disulfide oxidoreductase activity using spectrophotometric assays that monitor NADPH oxidation at 340 nm or GSSG reduction. An intracellular assay for activity screening and characterization of glutathione-dependent oxidoreductases has been developed.
CRISPR Screening and Functional Genomics
Genome-wide CRISPR knockout screens can identify genes required for glutathione disulfide oxidoreductase activity and resistance to oxidative stress. This approach is powerful for discovering novel regulators [1,6].
Proteomics and Redox Proteomics
Mass spectrometry-based redox proteomics can identify proteins with altered thiol oxidation states upon modulation of glutathione disulfide oxidoreductase activity. Mixed disulfide intermediates can be detected as described for yeast glutathione reductase.
Clinical and Translational Studies
Measuring glutathione status and enzyme activities in patient samples (blood, tissue) can reveal associations with diseases such as renal transplant injury and pregnancy complications [5,7,8].
How CRISPR Can Be Used to Study GO:0015038 glutathione disulfide oxidoreductase activity
Knockout
CRISPR knockout of genes encoding glutathione disulfide oxidoreductases (e.g., GSR, GLRX) can reveal their essential roles in redox homeostasis and cell survival. Knockout cell lines are valuable for testing compensatory pathways and drug sensitivity [1,4].
Point Mutation
Introducing point mutations in catalytic cysteines or cofactor-binding residues of glutathione reductase or glutaredoxins allows precise dissection of the catalytic mechanism and the role of specific residues in electron transfer.
Knock-in
Knock-in of tagged versions (e.g., GFP, HA) of glutathione disulfide oxidoreductases enables live-cell imaging, immunoprecipitation, and proteomic analysis of interacting partners. Knock-in of disease-associated mutations can model human disorders.
Overexpression
Overexpression of glutathione disulfide oxidoreductases or their regulators (e.g., G6PD, NFE2L2) can protect cells from oxidative stress and serve as a gain-of-function model to study redox signaling and drug resistance.
How EDITGENE Supports glutathione disulfide oxidoreductase activity Research
Researchers studying glutathione disulfide oxidoreductase activity-related genes often need to determine whether a candidate gene is causally involved in redox regulation, disease susceptibility, or drug response. EDITGENE provides comprehensive CRISPR-based services to accelerate this discovery process.
Contact EDITGENE today to design your custom CRISPR model for glutathione disulfide oxidoreductase activity research.
Frequently Asked Questions About glutathione disulfide oxidoreductase activity
What is glutathione disulfide oxidoreductase activity?
It is a molecular function (GO:0015038) that catalyzes the reaction 2 glutathione + electron acceptor = glutathione disulfide + electron donor, maintaining cellular redox balance.
What genes are involved in glutathione disulfide oxidoreductase activity?
Key genes include GSR (glutathione reductase), GLRX (glutaredoxin), G6PD, and NFE2L2, among others [1,4,6].
How is glutathione disulfide oxidoreductase activity measured?
It is typically measured by spectrophotometric assays monitoring NADPH oxidation or GSSG reduction, or by intracellular activity assays [1,4].
What diseases are associated with glutathione disulfide oxidoreductase activity?
It has been linked to renal transplant injury, pregnancy complications, and oxidative stress-related disorders [5,8].
Can CRISPR be used to study glutathione disulfide oxidoreductase activity?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models enable precise functional studies of genes encoding these enzymes [1,4].
What is the role of glutathione reductase in the cell?
Glutathione reductase reduces glutathione disulfide to reduced glutathione, which is essential for antioxidant defense and redox signaling.
How does sleep quality affect glutathione disulfide oxidoreductase activity?
In pregnant women, sleep quality has been associated with changes in the glutathione unit of the antioxidant system.
Is glutathione disulfide oxidoreductase activity present on platelets?
Yes, platelet surface glutathione reductase-like activity has been detected, suggesting a role in thrombosis.
What is the reaction catalyzed by glutathione disulfide oxidoreductase?
The reaction is: 2 glutathione + electron acceptor = glutathione disulfide + electron donor.
How do electrophiles affect glutathione disulfide oxidoreductase activity?
Electrophiles can modulate glutathione reductase activity via alkylation and upregulation of glutathione biosynthesis.
Conclusion
Glutathione disulfide oxidoreductase activity (GO:0015038) is a fundamental molecular function that maintains cellular redox homeostasis and protects against oxidative stress. Its dysregulation is implicated in diverse pathologies, from renal transplant injury to pregnancy complications. Advances in CRISPR-based models and functional genomics are poised to uncover new therapeutic opportunities targeting this activity. EDITGENE offers a comprehensive suite of services to support researchers in dissecting the genes and pathways involved.
References
- 1. Zimmermann J et al.. 2021. An intracellular assay for activity screening and characterization of glutathione-dependent oxidoreductases.. Free Radic Biol Med 172:340-349 PMID: 34146665
- 2. Essex DW et al.. 2004. Platelet surface glutathione reductase-like activity.. Blood 104(5):1383-5 PMID: 15142878
- 3. Sakuma S et al.. 1992. Inhibition of prostaglandin delta 13 reductase activity in rabbit kidney cortex by glutathione disulfide.. Prostaglandins 43(5):435-43 PMID: 1316624
- 4. Arscott LD et al.. 2000. Mixed disulfide with glutathione as an intermediate in the reaction catalyzed by glutathione reductase from yeast and as a major form of the enzyme in the cell.. Biochemistry 39(16):4711-21 PMID: 10769127
- 5. De Vega L et al.. 2003. Study of the activity of glutathione-peroxidase, glutathione-transferase, and glutathione-reductase in renal transplants.. Transplant Proc 35(4):1346-50 PMID: 12826156
- 6. Jobbagy S et al.. 2019. Electrophiles modulate glutathione reductase activity via alkylation and upregulation of glutathione biosynthesis.. Redox Biol 21:101050 PMID: 30654300
- 7. Janiak M et al.. 2010. Blood glutathione status and activity of glutathione-metabolizing antioxidant enzymes in erythrocytes of young trotters in basic training.. J Anim Physiol Anim Nutr (Berl) 94(2):137-45 PMID: 19364380
- 8. Semenova NV et al.. 2023. [Glutathione unit of the antioxidant system activity in pregnant women depending on the sleep quality].. Zh Nevrol Psikhiatr Im S S Korsakova 123(10):101-105 PMID: 37966447
