GO:0006124 ferredoxin metabolic process: Iron-Sulfur Protein Metabolism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0006124 ferredoxin metabolic process describes the chemical reactions and pathways involving ferredoxin, a simple nonenzymatic iron-sulfur protein with equal numbers of iron and labile sulfur atoms arranged in one or two clusters.
• Ferredoxins are ancient electron carriers that function in photosynthesis, nitrogen fixation, hydrogen production, and carbon monoxide-driven bioethanol production.
• The ferredoxin/thioredoxin system is a central regulatory mechanism in oxygenic photosynthesis, controlling enzyme activity in response to light.
• FDX1 regulates cellular protein lipoylation through direct binding to LIAS, linking ferredoxin metabolism to mitochondrial metabolism and disease.
• Electron bifurcation is a long-hidden energy-coupling mechanism that involves ferredoxin and related iron-sulfur proteins.
• Plant-type ferredoxins participate in diverse ferredoxin-dependent metabolic pathways, making them attractive targets for biotechnology and synthetic biology.
Description
Ferredoxin metabolic process (GO:0006124) encompasses the chemical reactions and pathways involving ferredoxin, a simple, nonenzymatic iron-sulfur protein characterized by having equal numbers of iron and labile sulfur atoms. Iron and sulfur atoms are present in one or two clusters of two or four atoms of each, enabling ferredoxin to transfer electrons in a wide range of biological systems. Since its discovery in the 1960s, ferredoxin has been recognized as a key electron carrier in photosynthesis and other fundamental processes. Researchers study ferredoxin metabolic process to understand how cells manage electron flow, iron-sulfur cluster assembly, and redox regulation, with implications for bioenergy, plant biology, and human health. The term is annotated in the biological_process aspect of the Gene Ontology, reflecting its role in metabolic pathways rather than as a standalone molecular function or cellular component. This article integrates authoritative QuickGO data with real PubMed literature to provide a research-grade overview of ferredoxin metabolic process, its genes, functions, and experimental methods.
ferredoxin metabolic process At A Glance
| GO ID | GO:0006124 |
|---|---|
| GO term | ferredoxin metabolic process |
| Ontology | biological_process |
| Synonym | ferredoxin metabolism |
| Major function | Electron transfer and redox regulation via iron-sulfur clusters |
| Definition | The chemical reactions and pathways involving ferredoxin, any simple, nonenzymatic iron-sulfur protein that is characterized by having equal numbers of atoms of iron and labile sulfur. Iron and sulfur atoms are present in one or two clusters of two or four atoms of each. |
| Iron-sulfur cluster composition | Equal numbers of iron and labile sulfur atoms; one or two clusters of two or four atoms each |
| Key pathways | Photosynthesis, nitrogen fixation, hydrogen production, carbon monoxide-driven bioethanol production |
| Representative proteins | FDX1, ferredoxin/thioredoxin system components, plant-type ferredoxins |
What Is GO:0006124?
GO:0006124 ferredoxin metabolic process is defined as the chemical reactions and pathways involving ferredoxin, any simple, nonenzymatic iron-sulfur protein that is characterized by having equal numbers of atoms of iron and labile sulfur. Iron and sulfur atoms are present in one or two clusters of two or four atoms of each. This biological process encompasses the synthesis, assembly, electron transfer, and degradation of ferredoxin, as well as its participation in metabolic pathways such as photosynthesis, nitrogen fixation, and hydrogen production. The synonym ferredoxin metabolism is also used.
Why Is ferredoxin metabolic process Important in Cell Biology?
Ferredoxin metabolic process is fundamentally important because ferredoxins are ancient, ubiquitous electron carriers that underpin photosynthesis, nitrogen fixation, hydrogen production, and other bioenergetic pathways. The ferredoxin/thioredoxin system regulates key enzymes in oxygenic photosynthesis, linking light signals to metabolic activity. In mitochondria, FDX1 regulates protein lipoylation through direct binding to LIAS, connecting ferredoxin metabolism to cellular metabolism and disease. Electron bifurcation, a mechanism involving ferredoxin, enables energy conservation in anaerobic microbes. Plant-type ferredoxins participate in diverse metabolic pathways, making them targets for crop improvement and biotechnology. Understanding ferredoxin metabolic process is therefore essential for basic biology, bioenergy, and translational research.
• Ferredoxin is a key electron carrier in photosynthesis, enabling light-driven electron transport.
• The ferredoxin/thioredoxin system regulates enzyme activity in response to light in oxygenic photosynthesis.
• FDX1 regulates cellular protein lipoylation through direct binding to LIAS, linking ferredoxin metabolism to mitochondrial function.
• Electron bifurcation involving ferredoxin is a long-hidden energy-coupling mechanism in anaerobic microbes.
• Ferredoxin-based catalysts are being explored for hydrogen production, relevant to clean energy.
• Carbon-monoxide-driven bioethanol production operates through a tungsten-dependent catalyst that may involve ferredoxin-like electron transfer.
• Plant-type ferredoxins are involved in diverse ferredoxin-dependent metabolic pathways, affecting plant growth and stress responses.
• Ferredoxin metabolic process is relevant to human health through its role in iron-sulfur cluster biology and lipoylation.
• Dysregulation of ferredoxin metabolism may contribute to metabolic disorders and cancer.
• Ferredoxin pathways are attractive targets for synthetic biology and metabolic engineering.
What Happens During ferredoxin metabolic process?
Ferredoxin synthesis and iron-sulfur cluster assembly
In simple terms: Cells build ferredoxin by inserting iron and sulfur atoms into a protein scaffold.
Ferredoxin is a simple iron-sulfur protein that requires the assembly of one or two clusters of two or four iron and labile sulfur atoms. The synthesis of ferredoxin involves the coordinated insertion of iron and sulfur into the apoprotein, a process that is essential for its electron transfer function. In plants, ferredoxin is synthesized in chloroplasts and participates in photosynthetic electron transport. The assembly of iron-sulfur clusters in ferredoxin is a fundamental step in its metabolic process, ensuring that the protein can accept and donate electrons.
Electron transfer and redox reactions
In simple terms: Ferredoxin shuttles electrons between molecules in metabolic pathways.
Ferredoxin functions as an electron carrier, transferring electrons in a variety of metabolic reactions. In photosynthesis, ferredoxin receives electrons from photosystem I and donates them to NADP+ reductase and other enzymes. The ferredoxin/thioredoxin system uses these electrons to reduce thioredoxin, which then regulates the activity of key enzymes in the Calvin cycle and other pathways. Ferredoxin also participates in nitrogen fixation, hydrogen production, and carbon monoxide-driven bioethanol production, where it mediates electron transfer to metalloenzymes. Electron bifurcation, a mechanism that couples exergonic and endergonic reactions, involves ferredoxin and related iron-sulfur proteins.
Ferredoxin-dependent metabolic pathways
In simple terms: Ferredoxin helps many different metabolic pathways run by supplying electrons.
Ferredoxin is involved in diverse metabolic pathways, including photosynthesis, nitrogen assimilation, sulfur metabolism, and hormone biosynthesis. Plant-type ferredoxins are particularly versatile, participating in ferredoxin-dependent metabolism in chloroplasts and other organelles. In anaerobic bacteria, ferredoxin is central to energy conservation through electron bifurcation. Ferredoxin-based catalysts are also being engineered for hydrogen production, highlighting the biotechnological potential of these pathways. The carbon-monoxide-driven bioethanol production pathway in some microbes operates through a tungsten-dependent catalyst that may interact with ferredoxin-like electron carriers.
Regulation of ferredoxin metabolic process
In simple terms: Cells control ferredoxin activity to match metabolic needs.
The ferredoxin/thioredoxin system is a major regulatory mechanism in oxygenic photosynthesis, where light-dependent reduction of thioredoxin modulates enzyme activity. FDX1 regulates cellular protein lipoylation through direct binding to LIAS, linking ferredoxin metabolism to mitochondrial function and metabolic regulation. In plants, ferredoxin gene expression is regulated by light and developmental cues, ensuring appropriate electron transfer capacity. Electron bifurcation provides a thermodynamic mechanism for energy conservation that is regulated by the cellular redox state. These regulatory layers ensure that ferredoxin metabolic process is tightly coupled to cellular energy demands.
Ferredoxin degradation and turnover
In simple terms: Ferredoxin is eventually broken down and recycled.
Like other proteins, ferredoxin undergoes turnover and degradation, releasing iron and sulfur for reuse. The degradation of iron-sulfur proteins is important for maintaining cellular iron homeostasis and preventing oxidative stress. In mitochondria, FDX1 is involved in iron-sulfur cluster metabolism and lipoylation, and its dysregulation can affect cellular health. The turnover of ferredoxin ensures that damaged or obsolete protein is removed, contributing to the dynamic nature of ferredoxin metabolic process.
Key Genes Involved in GO:0006124 ferredoxin metabolic process
The following genes and proteins are central to ferredoxin metabolic process, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| FDX1 | Ferredoxin 1, regulates protein lipoylation via LIAS binding | Mitochondrial metabolism, cancer, lipoylation disorders |
| FDX2 | Ferredoxin 2, involved in iron-sulfur cluster biosynthesis | Mitochondrial iron-sulfur cluster assembly |
| LIAS | Lipoyl synthase, binds FDX1 | Protein lipoylation, metabolic regulation |
| FTR | Ferredoxin-thioredoxin reductase | Photosynthetic regulation |
| TRX | Thioredoxin, reduced by ferredoxin | Redox regulation in photosynthesis |
| PETF | Plant-type ferredoxin | Photosynthetic electron transport |
| FNR | Ferredoxin-NADP+ reductase | Electron transfer to NADP+ |
| NifH | Nitrogenase reductase | Nitrogen fixation, electron transfer from ferredoxin |
| HydA | Hydrogenase | Hydrogen production, ferredoxin-based catalysis |
| CODH | Carbon monoxide dehydrogenase | Carbon monoxide-driven bioethanol production |
| Fdx | Bacterial ferredoxin | Electron bifurcation |
| FdR | Ferredoxin reductase | Electron transfer |
| SufU | Iron-sulfur cluster assembly | Ferredoxin maturation |
| IscU | Iron-sulfur cluster scaffold | Ferredoxin assembly |
| Grx | Glutaredoxin | Redox regulation linked to ferredoxin |
| PGR5 | Proton gradient regulation 5 | Photosynthetic electron transport |
| FdC1 | Ferredoxin C1 | Plant ferredoxin variant |
| FdC2 | Ferredoxin C2 | Plant ferredoxin variant |
How Is ferredoxin metabolic process Regulated?
Ferredoxin metabolic process is regulated at multiple levels. The ferredoxin/thioredoxin system is controlled by light, which reduces thioredoxin and modulates enzyme activity in photosynthesis. FDX1 regulates protein lipoylation through direct binding to LIAS, linking ferredoxin metabolism to mitochondrial metabolic regulation. In plants, ferredoxin gene expression is influenced by light and developmental signals. Electron bifurcation provides a redox-sensitive mechanism for energy conservation. These regulatory mechanisms ensure that ferredoxin metabolic process is responsive to cellular energy status and environmental cues.
ferredoxin metabolic process and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| FDX1 | Cancer, metabolic disorders, lipoylation defects | FDX1 knockout cell lines, point mutations |
| LIAS | Lipoic acid biosynthesis disorders | LIAS knockout and knock-in models |
| FDX2 | Iron-sulfur cluster diseases | FDX2 knockout cells |
| FTR | Photosynthetic dysfunction | Plant ferredoxin/thioredoxin mutants |
| HydA | Bioenergy production | Hydrogenase overexpression in microbial hosts |
Ferredoxin metabolism in cancer and metabolic disorders
FDX1 regulates cellular protein lipoylation through direct binding to LIAS, and dysregulation of this pathway has been implicated in cancer and metabolic disorders. Ferredoxin-dependent lipoylation is essential for the function of mitochondrial enzyme complexes, and its disruption can affect cellular metabolism. Understanding ferredoxin metabolic process may reveal therapeutic targets for diseases linked to mitochondrial dysfunction.
Ferredoxin and iron-sulfur cluster disorders
Ferredoxin is an iron-sulfur protein, and defects in iron-sulfur cluster assembly can affect ferredoxin function. Mutations in genes involved in iron-sulfur cluster biosynthesis, such as FDX2 and LIAS, can lead to rare metabolic diseases. Research into ferredoxin metabolic process helps elucidate the molecular basis of these disorders.
Ferredoxin in infectious disease and microbial pathogenesis
Ferredoxin is essential for many anaerobic microbes, including pathogens that rely on electron bifurcation for energy conservation. Carbon-monoxide-driven bioethanol production in some microbes involves ferredoxin-like electron carriers, which could be targeted for industrial or therapeutic purposes. Ferredoxin pathways are therefore relevant to microbial pathogenesis and biotechnology.
From ferredoxin metabolic process-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does FDX1 regulate lipoylation? | FDX1 knockout and point-mutation cell lines |
| How does ferredoxin/thioredoxin system regulate photosynthesis? | Plant mutants with altered FTR or TRX |
| Can ferredoxin-based catalysts improve hydrogen production? | Overexpression of ferredoxin scaffolds in bacteria |
| What is the role of electron bifurcation in energy conservation? | Knockout of ferredoxin genes in anaerobic microbes |
| How does carbon monoxide drive bioethanol production? | Knock-in of tungsten-dependent catalyst genes |
| What are the metabolic consequences of ferredoxin dysfunction? | CRISPR knockout of FDX1 in human cell lines |
How to Study the ferredoxin metabolic process Process
| Method | What It Measures | Typical Application |
|---|---|---|
| CRISPR knockout | Gene function loss | FDX1 knockout in human cells |
| Site-directed mutagenesis | Point mutations in ferredoxin | Structure-function studies |
| RNA-seq | Transcriptional changes | Ferredoxin gene expression |
| Proteomics | Protein abundance and modifications | Lipoylation analysis |
| EPR spectroscopy | Iron-sulfur cluster oxidation states | Electron transfer studies |
| Enzyme assays | Electron transfer activity | Ferredoxin-NADP+ reductase activity |
| Metabolomics | Metabolic flux | Bioethanol production |
| Crystallography | Three-dimensional structure | Ferredoxin fold |
Genetic and biochemical approaches
Researchers study ferredoxin metabolic process using genetic knockouts, point mutations, and overexpression of ferredoxin genes in model organisms. Biochemical assays measure electron transfer activity and iron-sulfur cluster content. These methods help define the roles of ferredoxin in photosynthesis, respiration, and other pathways.
Omics and systems biology
Transcriptomics, proteomics, and metabolomics can reveal how ferredoxin metabolic process is regulated and integrated with cellular metabolism. For example, proteomic analysis of FDX1 knockout cells identifies changes in lipoylation and mitochondrial proteins. Systems biology approaches model electron flow and redox balance.
Structural and spectroscopic methods
X-ray crystallography, NMR, and EPR spectroscopy provide insights into ferredoxin structure and iron-sulfur cluster geometry. These techniques are essential for understanding how ferredoxin transfers electrons. Spectroscopic methods also detect cluster oxidation states during catalysis.
Synthetic biology and engineering
Ferredoxin pathways are engineered for bioenergy applications, such as hydrogen production and bioethanol synthesis. Researchers use CRISPR to modify ferredoxin genes in microbial hosts, optimizing electron flux. These approaches demonstrate the biotechnological potential of ferredoxin metabolic process.
How CRISPR Can Be Used to Study GO:0006124 ferredoxin metabolic process
Knockout
CRISPR knockout of ferredoxin genes such as FDX1 enables researchers to study loss-of-function phenotypes, including defects in lipoylation and mitochondrial metabolism. Knockout models are essential for determining the causal role of ferredoxin in metabolic pathways.
Point Mutation
Point mutations in ferredoxin genes can mimic disease-associated variants or alter iron-sulfur cluster coordination, allowing precise structure-function analysis. CRISPR-mediated point mutations are valuable for studying electron transfer mechanisms.
Knock-in
Knock-in of tagged or variant ferredoxin genes enables visualization and biochemical purification of ferredoxin complexes. This approach is useful for tracking ferredoxin localization and interactions.
Overexpression
Overexpression of ferredoxin or ferredoxin-based catalysts can enhance electron transfer pathways, such as hydrogen production or bioethanol synthesis. CRISPR activation or cDNA overexpression is used to study gain-of-function effects.
How EDITGENE Supports ferredoxin metabolic process Research
Researchers studying ferredoxin metabolic process-related genes often need to determine whether a candidate gene is causally involved in electron transfer, iron-sulfur cluster assembly, or metabolic regulation. EDITGENE provides CRISPR-based cell models and screening services to accelerate this research.
Contact EDITGENE today to design your custom CRISPR model for ferredoxin metabolic process research.
Frequently Asked Questions About ferredoxin metabolic process
What is ferredoxin metabolic process?
Ferredoxin metabolic process (GO:0006124) is the set of chemical reactions and pathways involving ferredoxin, a simple nonenzymatic iron-sulfur protein with equal numbers of iron and labile sulfur atoms.
What genes are involved in ferredoxin metabolic process?
Key genes include FDX1, FDX2, LIAS, FTR, TRX, PETF, FNR, NifH, HydA, and CODH, among others.
What is the function of ferredoxin?
Ferredoxin functions as an electron carrier in photosynthesis, nitrogen fixation, hydrogen production, and other metabolic pathways.
How is ferredoxin metabolic process regulated?
It is regulated by light via the ferredoxin/thioredoxin system, by FDX1 binding to LIAS, and by redox-sensitive mechanisms such as electron bifurcation.
What diseases are linked to ferredoxin metabolism?
Dysregulation of FDX1 and LIAS is linked to cancer, metabolic disorders, and lipoylation defects.
What is the ferredoxin/thioredoxin system?
It is a regulatory system in oxygenic photosynthesis where ferredoxin reduces thioredoxin, which then modulates enzyme activity.
How can I study ferredoxin metabolic process in the lab?
CRISPR knockout, point mutation, knock-in, overexpression, proteomics, and spectroscopic methods are commonly used.
What is electron bifurcation in ferredoxin metabolism?
Electron bifurcation is a mechanism that couples exergonic and endergonic reactions, often involving ferredoxin, to conserve energy.
Can ferredoxin be used for bioenergy?
Yes, ferredoxin-based catalysts are being explored for hydrogen production and bioethanol synthesis.
What model systems are used to study ferredoxin metabolic process?
Common models include human cell lines, plants, and anaerobic microbes, using CRISPR and biochemical assays.
Conclusion
Ferredoxin metabolic process (GO:0006124) is a fundamental biological process centered on iron-sulfur electron carriers that drive photosynthesis, nitrogen fixation, hydrogen production, and other key pathways. The integration of QuickGO annotations with real PubMed literature highlights the importance of ferredoxin in cellular metabolism and disease. Researchers can leverage CRISPR-based models and multi-omics approaches to dissect ferredoxin function and develop biotechnological applications.
References
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- 3. Lemaire ON et al.. 2026. Carbon-monoxide-driven bioethanol production operates through a tungsten-dependent catalyst.. Nat Chem Biol 22(1):28-36 PMID: 41162695
- 4. Arnon DI. 1965. Ferredoxin and photosynthesis.. Science 149(3691):1460-70 PMID: 5318334
- 5. She Y et al.. 2025. Hydrogen-Producing Catalysts Based on Ferredoxin Scaffolds.. Adv Sci (Weinh) 12(33):e01897 PMID: 40525644
- 6. Schürmann P et al.. 2008. The ferredoxin/thioredoxin system of oxygenic photosynthesis.. Antioxid Redox Signal 10(7):1235-74 PMID: 18377232
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