GO:0047888 fatty acid peroxidase activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0047888 fatty acid peroxidase activity catalyzes the reaction: 2 H2O2 + H+ + palmitate = CO2 + 3 H2O + pentadecanal.
• This activity is a molecular_function that converts long-chain fatty acids into aldehydes and CO2 using hydrogen peroxide.
• Enzymes with this activity include bacterial cytochrome P450 peroxygenases and plant/fungal peroxidases that act on fatty acid hydroperoxides [2,3,6].
• Fatty acid peroxidase activity is linked to fatty acid metabolism, oxidative stress responses, and the production of signaling aldehydes [3,6].
• Dysregulation of fatty acid peroxidase activity has been implicated in inflammatory diseases and metabolic disorders [4,8].
• CRISPR knockout, point mutation, and overexpression models are essential to dissect the physiological roles of genes encoding fatty acid peroxidases.
Description
Fatty acid peroxidase activity (GO:0047888) is a molecular function that catalyzes the oxidative decarboxylation of long-chain fatty acids, such as palmitate, in the presence of hydrogen peroxide, yielding carbon dioxide, water, and a fatty aldehyde [2,3]. This activity is distinct from classical glutathione peroxidases that reduce lipid hydroperoxides, because it directly converts a non-esterified fatty acid into an aldehyde product [5,6]. The reaction is of interest because it sits at the intersection of fatty acid metabolism and reactive oxygen species (ROS) homeostasis, and it generates bioactive aldehydes that can modulate cellular signaling [3,6]. Researchers study fatty acid peroxidase activity to understand how cells detoxify peroxides while simultaneously producing lipid-derived mediators. For example, bacterial cytochrome P450 enzymes exhibit peroxidase activity toward fatty acids, and this activity can be modulated by the presence of organic solvents or specific fatty acids. In photosynthetic organisms, a plastid-localized peroxidase directs the production of trans fatty acids, linking this activity to membrane lipid remodeling. In fungi, a catalase-like enzyme reacts selectively with a 13S-hydroperoxide of linoleic acid, demonstrating substrate specificity that may control oxylipin signaling. The importance of this activity extends to human health. Glutathione peroxidase activity toward fatty acid hydroperoxides is influenced by dietary essential fatty acids and vitamin E status, and altered fatty acid oxidation pathways contribute to inflammatory diseases such as MPO-ANCA-associated vasculitis. Thus, GO:0047888 represents a key enzymatic function for both basic lipid biochemistry and translational research.
fatty acid peroxidase activity At A Glance
| GO ID | GO:0047888 |
|---|---|
| GO term | fatty acid peroxidase activity |
| Ontology | molecular_function |
| Synonym | fatty-acid peroxidase activity; hexadecanoate:hydrogen-peroxide oxidoreductase activity; long chain fatty acid peroxidase activity |
| Definition | Catalysis of the reaction: 2 H2O2 + H+ + palmitate = CO2 + 3 H2O + pentadecanal. |
| Major function | Oxidative decarboxylation of long-chain fatty acids using hydrogen peroxide |
| Substrates | Long-chain fatty acids (e.g., palmitate), hydrogen peroxide |
| Products | Fatty aldehydes (e.g., pentadecanal), carbon dioxide, water |
| Related activities | Peroxidase activity, fatty acid oxidation, oxylipin biosynthesis |
What Is GO:0047888?
Fatty acid peroxidase activity (GO:0047888) is defined as the catalysis of the reaction: 2 H2O2 + H+ + palmitate = CO2 + 3 H2O + pentadecanal. In other words, it is an oxidoreductase activity that uses hydrogen peroxide to oxidize a long-chain fatty acid (e.g., palmitate) into a fatty aldehyde (pentadecanal) and carbon dioxide. This definition is based on the QuickGO entry for GO:0047888 and encompasses synonyms such as fatty-acid peroxidase activity, hexadecanoate:hydrogen-peroxide oxidoreductase activity, and long chain fatty acid peroxidase activity.
Why Is fatty acid peroxidase activity Important in Cell Biology?
Fatty acid peroxidase activity is important because it links peroxide detoxification to the production of lipid-derived signaling molecules. By converting fatty acids into aldehydes, this activity can generate compounds that affect membrane properties, cell signaling, and inflammatory responses [3,6]. Moreover, the activity is modulated by dietary factors such as essential fatty acids and vitamin E, which influence glutathione peroxidase activity toward fatty acid hydroperoxides. In disease contexts, altered fatty acid oxidation pathways, including those involving peroxidases, contribute to the pathogenesis of inflammatory vasculitis. Understanding this activity therefore has implications for nutrition, metabolic disease, and inflammation research.
• Provides a route for detoxifying hydrogen peroxide while oxidizing fatty acids.
• Generates fatty aldehydes that can act as signaling molecules or membrane modulators.
• Influenced by dietary essential fatty acids and vitamin E status.
• Contributes to oxylipin metabolism through peroxidase activity toward hydroperoxides.
• Exhibits substrate specificity that may control fungal oxylipin signaling.
• Can be engineered in artificial P450 peroxygenases for biotechnological applications.
• Linked to inflammatory diseases such as MPO-ANCA-associated vasculitis via fatty acid oxidation.
• Relevant to photosynthetic organisms for trans fatty acid production.
• Potential target for modulating oxidative stress in metabolic disorders [4,8].
• Useful for studying enzyme mechanisms and substrate recognition [2,7].
What Happens During fatty acid peroxidase activity?
Substrate binding and peroxide activation
In simple terms: The enzyme grabs a fatty acid and a peroxide molecule to start the reaction.
The first step involves binding of a long-chain fatty acid (e.g., palmitate) and hydrogen peroxide to the active site of the enzyme. Bacterial cytochrome P450 enzymes can exhibit peroxidase activity toward fatty acids, and this binding can be influenced by the presence of organic solvents or specific fatty acids. In some enzymes, the peroxide is activated by a heme iron or other cofactor to form a reactive intermediate that attacks the fatty acid chain.
Oxidative decarboxylation and aldehyde formation
In simple terms: The enzyme removes a carbon from the fatty acid, turning it into an aldehyde and releasing CO2.
Following activation, the enzyme catalyzes the oxidative decarboxylation of the fatty acid, resulting in the formation of a fatty aldehyde (e.g., pentadecanal) and carbon dioxide. This reaction consumes two molecules of hydrogen peroxide and produces three molecules of water, as defined by GO:0047888. In plants, a plastid-localized peroxidase directs the production of trans fatty acids, indicating that similar chemistry can occur in photosynthetic organisms. The aldehyde product can be further metabolized or act as a signaling molecule.
Product release and cellular fate
In simple terms: The aldehyde and CO2 are released, and the enzyme is ready for another round.
After the reaction, the fatty aldehyde and CO2 are released from the active site. The aldehyde may participate in oxylipin signaling or be converted to other metabolites. For instance, glutathione transferases exhibit peroxidase activity toward 13-hydroperoxyoctadecadienoic acid, leading to the formation of hydroxy fatty acids that can have signaling roles. In fungi, a catalase reacts selectively with the 13S-hydroperoxide product of a lipoxygenase, and this reaction exhibits 13S-hydroperoxide-dependent peroxidase activity, suggesting a role in oxylipin metabolism.
Regulation by redox-sensitive residues
In simple terms: The enzyme's activity can be tuned by changing specific amino acids that sense the cell's redox state.
The catalytic efficiency of fatty acid peroxidases can be modulated by redox-sensitive residues. Engineering of artificial P450 peroxygenases has shown that tuning redox-sensitive residues can alter peroxidase activity, providing insights into how these enzymes are regulated in vivo. Additionally, the presence of organic solvents or specific fatty acids can modulate the peroxidase activity of bacterial cytochrome P450 enzymes, indicating that the local environment affects catalysis.
Key Genes Involved in GO:0047888 fatty acid peroxidase activity
The following genes and proteins are directly associated with fatty acid peroxidase activity or related peroxidase functions toward fatty acids, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CYP152A1 | Bacterial cytochrome P450 peroxygenase with peroxidase activity toward fatty acids | Model for studying substrate specificity and solvent effects |
| CYP152A2 | Bacterial cytochrome P450 peroxygenase | Used to engineer redox-sensitive residues for altered peroxidase activity |
| LOX1 | Lipoxygenase producing 13S-hydroperoxide in fungi | Provides substrate for fungal catalase peroxidase activity |
| CAT | Fungal catalase with 13S-hydroperoxide-dependent peroxidase activity | Studied for selective oxylipin metabolism |
| GST | Glutathione transferase with peroxidase activity toward fatty acid hydroperoxides | Involved in detoxification of oxidized linoleic acid |
| GPX | Glutathione peroxidase acting on fatty acid hydroperoxides | Activity influenced by vitamin E and essential fatty acids |
| LCD1 | Low Carbon Inducible1 in Chlamydomonas reinhardtii | Directs plastid peroxidase location and trans fatty acid production |
| FAD4 | Fatty Acid Desaturase4 in Chlamydomonas reinhardtii | Part of locus affecting peroxidase location and trans fatty acid production |
| MPO | Myeloperoxidase, involved in neutrophil function | Linked to fatty acid oxidation in MPO-ANCA vasculitis |
| PPARα | Nuclear receptor regulating fatty acid oxidation | Modulates neutrophil fatty acid oxidation in vasculitis |
| CPT1a | Carnitine palmitoyltransferase 1a, rate-limiting for fatty acid oxidation | Target of PPARα pathway in neutrophils |
| CYP4A | Cytochrome P450 family involved in fatty acid oxidation | Potential peroxidase activity, though not directly cited in provided references |
| CYP2E1 | Cytochrome P450 involved in fatty acid metabolism | May exhibit peroxidase activity, but not directly cited in provided references |
| COX | Cyclooxygenase, peroxidase activity in prostaglandin synthesis | Related peroxidase function, but not directly cited in provided references |
| LOX | Lipoxygenase, produces fatty acid hydroperoxides | Substrates for peroxidases |
| PXG | Peroxygenase, artificial P450 variant | Engineered for tuned peroxidase activity |
| GPX4 | Glutathione peroxidase 4, reduces lipid peroxides | Related activity, but not directly cited in provided references |
| ALOX | Arachidonate lipoxygenase | Produces hydroperoxides for peroxidase action |
How Is fatty acid peroxidase activity Regulated?
Fatty acid peroxidase activity is regulated at multiple levels. The presence of organic solvents or specific fatty acids can modulate the peroxidase activity of bacterial cytochrome P450 enzymes, suggesting that the local lipid environment influences catalysis. Redox-sensitive residues within the enzyme can tune activity, as demonstrated by engineering artificial P450 peroxygenases. In mammals, dietary essential fatty acids and vitamin E status affect glutathione peroxidase activity toward fatty acid hydroperoxides, indicating nutritional regulation. Additionally, in inflammatory conditions, the PPARα-CPT1a pathway regulates fatty acid oxidation in neutrophils, which may indirectly influence peroxidase activity.
fatty acid peroxidase activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| MPO | MPO-ANCA-associated vasculitis | Knockout mouse or human neutrophil cell line with MPO KO |
| PPARα | Inflammatory vasculitis, fatty acid oxidation | PPARα knockout mouse or overexpression in neutrophils |
| CPT1a | Fatty acid oxidation in neutrophils | CPT1a knockout or point mutation cell lines |
| GPX | Oxidative stress, vitamin E deficiency | GPX knockout cells treated with fatty acid hydroperoxides |
| GST | Detoxification of oxidized linoleic acid | GST knockout or overexpression in mammalian cells |
Inflammatory and autoimmune diseases
Fatty acid peroxidase activity may contribute to inflammatory diseases through the generation of lipid aldehydes and modulation of oxidative stress. In MPO-ANCA-associated vasculitis, FTY720 ameliorates experimental disease by regulating fatty acid oxidation via the neutrophil PPARα-CPT1a pathway. This suggests that enzymes involved in fatty acid oxidation, including peroxidases, could be therapeutic targets. Additionally, glutathione peroxidase activity toward fatty acid hydroperoxides is influenced by vitamin E and essential fatty acid status, which may affect inflammatory responses.
Metabolic disorders
Altered fatty acid peroxidase activity could impact metabolic disorders by affecting lipid signaling and peroxide detoxification. The fungal catalase with 13S-hydroperoxide-dependent peroxidase activity demonstrates how selective metabolism of fatty acid hydroperoxides can control oxylipin signaling. In humans, glutathione transferases metabolize oxidized linoleic acid through peroxidase activity, linking this activity to the detoxification of dietary and endogenous lipid peroxides. Dysregulation of these pathways may contribute to metabolic syndrome and related conditions.
Photosynthetic organisms and biotechnology
In Chlamydomonas reinhardtii, the Low Carbon Inducible2/Fatty Acid Desaturase4 locus directs plastid peroxidase location and trans fatty acid production. This highlights the role of fatty acid peroxidase activity in membrane lipid remodeling and potential biotechnological applications for producing trans fatty acids. Understanding this pathway could inform strategies for engineering lipid composition in crops or algae.
From fatty acid peroxidase activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of a candidate fatty acid peroxidase gene affect lipid metabolism? | CRISPR knockout cell line (e.g., HEK293, HepG2) |
| Does a specific point mutation alter substrate specificity? | Point mutation knock-in via CRISPR in a cell line |
| Does overexpression of the enzyme increase aldehyde production? | Overexpression cell line with inducible promoter |
| Where is the enzyme localized in the cell? | Tagged knock-in with fluorescent protein (e.g., GFP) |
| What is the impact of the enzyme on oxidative stress resistance? | Knockout and overexpression cells treated with H2O2 |
| Can the enzyme be engineered for improved activity? | Directed evolution or rational design in bacterial or yeast models |
How to Study the fatty acid peroxidase activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Spectrophotometric peroxidase assay | H2O2 consumption or chromogen oxidation | Measuring enzyme activity in vitro |
| GC-MS lipidomics | Fatty acid and aldehyde profiles | Quantifying substrate and product levels |
| LC-MS oxylipin profiling | Hydroperoxide and hydroxy fatty acid levels | Assessing peroxidase activity in cells [5,6] |
| CRISPR knockout screen | Gene essentiality under oxidative stress | Identifying regulators of fatty acid peroxidase activity |
| Site-directed mutagenesis | Effect of point mutations on activity | Engineering improved enzymes |
| Fluorescence microscopy | Subcellular localization of tagged enzyme | Determining organelle targeting |
| Enzyme kinetics | Km, Vmax, kcat | Characterizing substrate specificity [2,7] |
| RNA-seq | Transcriptional changes upon knockout | Identifying compensatory pathways |
Enzymatic activity assays
Fatty acid peroxidase activity can be measured using spectrophotometric or chromatographic methods that detect the consumption of hydrogen peroxide or the formation of aldehyde products. For example, the peroxidase activity of bacterial cytochrome P450 enzymes toward fatty acids can be monitored by following the oxidation of a substrate in the presence of H2O2. Similarly, glutathione peroxidase activity toward fatty acid hydroperoxides can be assayed using coupled enzyme systems [4,5].
Lipidomics and metabolomics
Mass spectrometry-based lipidomics can quantify fatty acid substrates and aldehyde products to assess peroxidase activity in cells or tissues. This approach has been used to study the metabolism of oxidized linoleic acid by glutathione transferases and the production of trans fatty acids in Chlamydomonas. Metabolomics can also reveal downstream effects on oxylipin signaling.
Genetic and CRISPR screens
CRISPR knockout or activation screens can identify genes that regulate fatty acid peroxidase activity or that depend on it for growth under oxidative stress. Such screens have been valuable in understanding the genetic basis of fatty acid oxidation pathways. Combining screens with lipidomics can uncover novel regulators.
Protein engineering and structural studies
Engineering redox-sensitive residues in artificial P450 peroxygenases has provided insights into the catalytic mechanism and regulation of fatty acid peroxidase activity. Structural biology techniques, such as X-ray crystallography and cryo-EM, can reveal substrate binding and catalytic intermediates, guiding further engineering efforts.
How CRISPR Can Be Used to Study GO:0047888 fatty acid peroxidase activity
Knockout
CRISPR knockout of genes encoding fatty acid peroxidases can reveal their physiological roles. For example, knocking out MPO or PPARα in cell models can help dissect their contribution to fatty acid oxidation and inflammation. Knockout of glutathione peroxidase genes can sensitize cells to fatty acid hydroperoxide-induced oxidative stress.
Point Mutation
Point mutations can be introduced to alter catalytic residues or redox-sensitive sites, thereby modulating fatty acid peroxidase activity. This approach has been used to tune the activity of artificial P450 peroxygenases. In cells, point mutations can mimic disease-associated variants or test the importance of specific amino acids for substrate binding.
Knock-in
Knock-in of tagged versions of fatty acid peroxidase genes (e.g., GFP or FLAG) allows for localization and interaction studies. For instance, tagging the Chlamydomonas LCD1/FAD4 locus could clarify its role in plastid peroxidase location. Knock-in of reporter genes can also be used to monitor promoter activity.
Overexpression
Overexpression of fatty acid peroxidase genes can increase enzymatic activity and aldehyde production, enabling studies of downstream effects. Overexpressing glutathione transferases or peroxidases in mammalian cells can protect against lipid peroxide-induced toxicity. In biotechnology, overexpression in microbial hosts can be used for producing fatty aldehydes or trans fatty acids.
How EDITGENE Supports fatty acid peroxidase activity Research
Researchers studying fatty acid peroxidase activity-related genes often need to determine whether a candidate gene is causally involved in lipid metabolism, oxidative stress responses, or disease. EDITGENE provides comprehensive CRISPR-based services to create precise cell models for such investigations.
Contact EDITGENE today to design your custom CRISPR model for fatty acid peroxidase activity research.
Frequently Asked Questions About fatty acid peroxidase activity
What is fatty acid peroxidase activity?
Fatty acid peroxidase activity (GO:0047888) is a molecular function that catalyzes the reaction: 2 H2O2 + H+ + palmitate = CO2 + 3 H2O + pentadecanal. It uses hydrogen peroxide to oxidize long-chain fatty acids into fatty aldehydes and carbon dioxide [2,3].
What genes are involved in fatty acid peroxidase activity?
Genes encoding cytochrome P450 peroxygenases (e.g., CYP152A1, CYP152A2), glutathione peroxidases, glutathione transferases, and fungal catalases have been associated with this activity [2,5,6,7].
What is the GO ID for fatty acid peroxidase activity?
The Gene Ontology ID for fatty acid peroxidase activity is GO:0047888.
How is fatty acid peroxidase activity measured?
It can be measured using spectrophotometric peroxidase assays, GC-MS lipidomics, or LC-MS oxylipin profiling to detect substrate consumption or product formation [2,3,5].
What diseases are linked to fatty acid peroxidase activity?
Altered activity has been implicated in inflammatory diseases such as MPO-ANCA-associated vasculitis, and in metabolic disorders related to oxidative stress [4,8].
Can CRISPR be used to study fatty acid peroxidase activity?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models allow precise manipulation of genes encoding fatty acid peroxidases to study their function [7,8].
What are the substrates of fatty acid peroxidase?
Long-chain fatty acids such as palmitate and fatty acid hydroperoxides (e.g., 13-hydroperoxyoctadecadienoic acid) serve as substrates [5,6].
What products are generated by fatty acid peroxidase activity?
The reaction produces fatty aldehydes (e.g., pentadecanal), carbon dioxide, and water [2,3].
Is fatty acid peroxidase activity the same as glutathione peroxidase?
No, glutathione peroxidase typically reduces lipid hydroperoxides using glutathione, while fatty acid peroxidase activity directly oxidizes fatty acids to aldehydes using hydrogen peroxide [4,5].
How is fatty acid peroxidase activity regulated?
It can be regulated by redox-sensitive residues, the presence of organic solvents or specific fatty acids, and nutritional factors such as vitamin E and essential fatty acids [2,4,7].
Conclusion
Fatty acid peroxidase activity (GO:0047888) is a distinct molecular function that couples peroxide detoxification with the production of fatty aldehydes and CO2. Its roles in lipid metabolism, oxidative stress, and inflammation make it a compelling target for basic and translational research. By leveraging CRISPR-based models and advanced analytical methods, researchers can uncover the precise contributions of individual genes to this activity and its impact on health and disease.
References
- 2. Rabe KS et al.. 2010. Peroxidase activity of bacterial cytochrome P450 enzymes: modulation by fatty acids and organic solvents.. Biotechnol J 5(8):891-9 PMID: 20632328
- 3. Nicodemus TJ et al.. 2025. Low Carbon Inducible2/Fatty Acid Desaturase4 locus in C. reinhardtii directs plastid peroxidase location and trans fatty acid production.. Plant Physiol 199(1) PMID: 40898847
- 4. Jensen GE et al.. 1981. Glutathione peroxidase activity in vitamin e and essential fatty acid-deficient rats.. Ann Nutr Metab 25(1):27-37 PMID: 7259108
- 5. Seeley SK et al.. 2006. Metabolism of oxidized linoleic acid by glutathione transferases: peroxidase activity toward 13-hydroperoxyoctadecadienoic acid.. Biochim Biophys Acta 1760(7):1064-70 PMID: 16624487
- 6. Teder T et al.. 2017. A fungal catalase reacts selectively with the 13S fatty acid hydroperoxide products of the adjacent lipoxygenase gene and exhibits 13S-hydroperoxide-dependent peroxidase activity.. Biochim Biophys Acta Mol Cell Biol Lipids 1862(7):706-715 PMID: 28363790
- 7. Jiang F et al.. 2024. Tuning the peroxidase activity of artificial P450 peroxygenase by engineering redox-sensitive residues.. Faraday Discuss 252(0):52-68 PMID: 38836616
- 8. Wang RX et al.. 2024. FTY720 ameliorates experimental MPO-ANCA-associated vasculitis by regulating fatty acid oxidation via the neutrophil PPARα-CPT1a pathway.. Rheumatology (Oxford) 63(9):2578-2589 PMID: 38837706
