GO:0016215 acyl-CoA desaturase activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0016215 acyl-CoA desaturase activity catalyzes the oxygen- and reduced-acceptor-dependent introduction of a double bond into an acyl-CoA substrate, producing a desaturated acyl-CoA, an oxidized acceptor, and two water molecules.
• The reaction is best known for the conversion of saturated fatty acyl-CoAs to monounsaturated species, a rate-limiting step in cellular fatty acid desaturation.
• Stearoyl-CoA desaturase 1 (SCD1) is the principal mammalian acyl-CoA desaturase and is a central regulator of lipid metabolism, ferroptosis sensitivity, and immune cell differentiation [1,2,3].
• SCD1 activity is modulated by metabolic signals including AMPK and lactate availability, linking acyl-CoA desaturase activity to redox balance and tumor ferroptosis.
• Acyl-CoA desaturase activity is implicated in cancer, autoimmunity, cardiac reprogramming, and hyperlipidemia, making it a high-value target for CRISPR functional genomics [1,2,3,5,6].
• CRISPR knockout, point-mutation, knock-in, and overexpression models enable causal dissection of acyl-CoA desaturase genes in disease-relevant cell systems [1,2,5].
Description
Acyl-CoA desaturase activity (GO:0016215) is a molecular function that introduces a double bond into a fatty acyl-CoA substrate using molecular oxygen and a reduced acceptor, yielding a desaturated acyl-CoA, an oxidized acceptor, and two molecules of water. This reaction is a fundamental step in the biosynthesis of monounsaturated fatty acids and is conserved from yeast to humans. In mammalian cells, the best-characterized enzyme carrying this activity is stearoyl-CoA desaturase 1 (SCD1), which converts saturated acyl-CoAs such as stearoyl-CoA to oleoyl-CoA and palmitoyl-CoA to palmitoleoyl-CoA [2,3]. The importance of acyl-CoA desaturase activity lies in its position at the intersection of lipid metabolism, membrane composition, redox biology, and cell fate. SCD1-mediated desaturation influences phospholipid composition and ferroptosis sensitivity in cancer cells, and it controls regulatory T cell differentiation and autoimmunity [1,2,3]. In ovarian cancer ascites, the balance between SCD1 and FADS2 desaturases determines lipid metabolic activity and redox-driven ferroptosis. Beyond cancer, SCD1 downregulation enhances fatty acid oxidation and fuels cardiac reprogramming, while pharmacological or dietary modulation of desaturase gene expression affects hyperlipidemic liver [5,6]. For researchers, GO:0016215 provides a precise functional annotation for genes and proteins that catalyze acyl-CoA desaturation. Understanding its catalytic mechanism, regulation, and disease relevance is essential for designing CRISPR-based models that test causality rather than correlation. This article integrates the QuickGO definition with verified PubMed literature to summarize the mechanism, key genes, disease links, and experimental methods used to study acyl-CoA desaturase activity [1,2,3,4,5,6,7,8].
acyl-CoA desaturase activity At A Glance
| GO ID | GO:0016215 |
|---|---|
| GO term | acyl-CoA desaturase activity |
| Ontology | molecular_function |
| Synonym | CoA desaturase activity |
| Definition | Catalysis of the reaction: acyl-CoA + reduced acceptor + O2 = desaturated-acyl-CoA + acceptor + 2 H2O. |
| Major function | Introduces a double bond into an acyl-CoA substrate, generating a desaturated acyl-CoA product. |
| Cofactors / requirements | Molecular oxygen (O2) and a reduced acceptor are required for catalysis. |
| Representative enzyme | Stearoyl-CoA desaturase 1 (SCD1) is a principal mammalian enzyme with this activity [2,3]. |
| Conservation | Acyl-CoA desaturase activity is conserved in yeast and higher eukaryotes. |
What Is GO:0016215?
In simple terms, acyl-CoA desaturase activity is the enzyme function that removes hydrogen from a fatty acid chain attached to coenzyme A, creating a double bond. According to the QuickGO definition, it catalyzes the reaction: acyl-CoA + reduced acceptor + O2 = desaturated-acyl-CoA + acceptor + 2 H2O. This means the enzyme uses oxygen and a reduced electron acceptor to oxidize the acyl-CoA substrate, producing a desaturated acyl-CoA product, an oxidized acceptor, and water. The synonym CoA desaturase activity reflects the same catalytic function.
Why Is acyl-CoA desaturase activity Important in Cell Biology?
Acyl-CoA desaturase activity is important because it controls the ratio of saturated to monounsaturated fatty acids in cellular membranes and lipid stores, which in turn affects membrane fluidity, signaling, and susceptibility to lipid peroxidation. In cancer, SCD1-mediated desaturation supports lipogenic enzyme expression and phospholipid composition that determine ferroptosis sensitivity. In ovarian cancer ascites, the equipoise between SCD1 and FADS2 desaturases regulates lipid metabolic activity and redox-driven ferroptosis. In immunology, fatty acid desaturation by SCD1 controls regulatory T cell differentiation and autoimmunity. In cardiology, SCD1 downregulation enhances fatty acid oxidation and fuels cardiac reprogramming. In metabolic disease, modulation of stearoyl-CoA desaturase gene expression and activity affects hyperlipidemic liver. These diverse roles make GO:0016215 a central node for functional genomics and therapeutic target discovery.
• Controls monounsaturated fatty acid synthesis and membrane phospholipid composition [1,2].
• Regulates ferroptosis sensitivity in cancer cells through lipogenic enzyme expression and phospholipid remodeling [1,2].
• Modulates redox balance and lipid metabolic activity in ascites-derived ovarian cancer cells.
• Controls regulatory T cell differentiation and autoimmunity.
• Is regulated by lactate-mediated AMPK signaling and influences tumor ferroptosis.
• Supports cardiac reprogramming through fatty acid oxidation when SCD1 is downregulated.
• Is a target of dietary and pharmacological modulation in hyperlipidemia.
• Is conserved across yeast and mammals, enabling cross-species mechanistic studies.
• Is differentially induced by fibrates in hepatoma cells, linking it to lipid-lowering drug responses.
• Provides a tractable molecular function for CRISPR knockout, point-mutation, and overexpression studies [1,2,5].
What Happens During acyl-CoA desaturase activity?
Substrate binding and oxygen activation
In simple terms: The enzyme grabs a fatty acid linked to coenzyme A and prepares oxygen to react with it.
Acyl-CoA desaturase activity begins with binding of a saturated acyl-CoA substrate and molecular oxygen. The reaction requires a reduced acceptor, which supplies electrons for the desaturation cycle. In yeast and mammalian systems, this step is tightly coupled to the enzyme's diiron active site, which activates oxygen for hydrogen abstraction from the fatty acid chain.
Hydrogen abstraction and double-bond formation
In simple terms: The enzyme removes two hydrogens from the fatty acid chain, creating a double bond.
Following oxygen activation, the enzyme abstracts hydrogen atoms from adjacent carbons of the acyl chain, forming a double bond and yielding a desaturated acyl-CoA product. This desaturation step converts saturated acyl-CoAs to monounsaturated species, a key reaction in fatty acid biosynthesis. The reaction stoichiometry produces two water molecules and an oxidized acceptor.
Product release and acceptor recycling
In simple terms: The newly desaturated fatty acid is released, and the electron carrier is recycled.
After double-bond formation, the desaturated acyl-CoA is released from the enzyme, and the oxidized acceptor must be reduced again by cellular electron transport systems to sustain further rounds of catalysis. This recycling links acyl-CoA desaturase activity to cellular redox metabolism and to pathways that regenerate reduced acceptors.
Integration with lipid metabolic networks
In simple terms: The desaturated product feeds into membrane and lipid signaling pathways.
The monounsaturated acyl-CoAs generated by acyl-CoA desaturase activity are incorporated into phospholipids, triglycerides, and other lipids, influencing membrane composition and signaling [1,2]. In cancer cells, this integration affects phospholipid composition and ferroptosis sensitivity. In ovarian cancer ascites, SCD1 and FADS2 desaturases balance lipid metabolic activity and redox-driven ferroptosis.
Key Genes Involved in GO:0016215 acyl-CoA desaturase activity
The following genes and proteins are experimentally linked to acyl-CoA desaturase activity or its regulation in mammalian and yeast systems.
| Gene | Major Role | Research Relevance |
|---|---|---|
| SCD1 | Principal mammalian acyl-CoA desaturase converting saturated to monounsaturated acyl-CoAs | Central to ferroptosis, cancer lipid metabolism, and immune cell differentiation [1,2,3] |
| SCD | Yeast acyl-CoA desaturase ortholog | Model for conserved desaturase mechanism and oxygen activation |
| FADS2 | Fatty acid desaturase that balances lipid metabolic activity with SCD1 | Modulates redox-driven ferroptosis in ovarian cancer ascites |
| ZEB1 | Transcription factor regulating lipogenic enzyme expression | Controls ferroptosis sensitivity via lipogenic and phospholipid changes |
| AMPK | Energy sensor kinase regulating SCD1 activity | Links lactate metabolism to SCD1 activity and tumor ferroptosis |
| HCAR1 | Lactate receptor upstream of AMPK-SCD1 signaling | Regulates tumor ferroptosis through lactate-mediated signaling |
| MCT1 | Monocarboxylate transporter affecting lactate flux | Modulates AMPK-SCD1 activity and ferroptosis |
| ACOX1 | Acyl-CoA oxidase involved in fatty acid oxidation | Differentially induced with SCD by fibrates in HepG2 cells |
| PPAR-alpha | Nuclear receptor mediating fibrate responses | Regulates SCD and ACOX gene induction in hepatoma cells |
| SCD1 (cardiac context) | Desaturase downregulated during cardiac reprogramming | Enhances fatty acid oxidation and reprogramming efficiency |
| Treg signature genes | Differentiation markers controlled by SCD1 activity | Link fatty acid desaturation to autoimmunity |
| Lipogenic enzymes | Downstream effectors of ZEB1-regulated lipid synthesis | Determine phospholipid composition and ferroptosis sensitivity |
How Is acyl-CoA desaturase activity Regulated?
Acyl-CoA desaturase activity is regulated at multiple levels. In tumor cells, lactate-mediated AMPK signaling modulates SCD1 activity, linking metabolic stress to ferroptosis. The transcription factor ZEB1 regulates lipogenic enzyme expression, including desaturases, thereby influencing phospholipid composition and ferroptosis sensitivity. In hepatoma cells, fibrates differentially induce SCD and ACOX genes, indicating pharmacological control of desaturase expression. In hyperlipidemic hamsters, Zingiber officinale extract reduces stearoyl-CoA desaturase gene expression and activity by lowering oxidative and endoplasmic reticulum stress. These layers of regulation allow cells to adjust desaturation capacity in response to metabolic, redox, and pharmacological cues [1,4,6,8].
acyl-CoA desaturase activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| SCD1 | Cancer ferroptosis and lipid metabolism | SCD1 knockout and overexpression in cancer cell lines [1,2] |
| FADS2 | Ovarian cancer ascites redox biology | FADS2 knockout or knockdown in ascites-derived cells |
| SCD1 | Autoimmunity and Treg differentiation | SCD1 knockout in T cell differentiation cultures |
| SCD1 | Cardiac reprogramming | SCD1 knockdown or knockout in cardiac fibroblasts |
| SCD | Hyperlipidemia and hepatic lipid metabolism | Dietary or pharmacological modulation in hamster liver |
Cancer and ferroptosis
Acyl-CoA desaturase activity is closely linked to ferroptosis, an iron-dependent form of cell death driven by lipid peroxidation. ZEB1 mediates EMT/plasticity-associated ferroptosis sensitivity by regulating lipogenic enzyme expression and phospholipid composition, implicating desaturases in this process. In ascites-derived ovarian cancer cells, SCD1 and FADS2 desaturases equipoise lipid metabolic activity and redox-driven ferroptosis. Lactate-mediated AMPK-SCD1 signaling also regulates tumor ferroptosis, providing a metabolic handle on this pathway.
Autoimmunity and immune cell differentiation
Fatty acid desaturation by SCD1 controls regulatory T cell differentiation and autoimmunity, demonstrating that acyl-CoA desaturase activity shapes adaptive immune responses. This links lipid metabolic enzymes to inflammatory and autoimmune disease biology.
Cardiac reprogramming and metabolic disease
Enhanced fatty acid oxidation via SCD1 downregulation fuels cardiac reprogramming, indicating that acyl-CoA desaturase activity can be manipulated to influence cell fate decisions. In hyperlipidemic hamster liver, Zingiber officinale extract diminishes stearoyl-CoA desaturase gene expression and activity by reducing oxidative and endoplasmic reticulum stress, connecting desaturase regulation to lipid-lowering strategies. Fibrates differentially induce SCD and ACOX genes in HepG2 cells, further linking desaturase activity to pharmacological lipid management.
From acyl-CoA desaturase activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is SCD1 required for ferroptosis sensitivity? | SCD1 knockout cell lines [1,2] |
| Does desaturase activity control Treg differentiation? | SCD1 knockout in primary T cell cultures |
| Can SCD1 downregulation enhance cardiac reprogramming? | SCD1 knockdown or knockout in cardiac fibroblasts |
| How does lactate signaling regulate SCD1 activity? | AMPK-SCD1 pathway perturbation with HCAR1/MCT1 models |
| Does fibrate treatment alter SCD expression? | HepG2 cells treated with fibrates |
| Does dietary extract reduce desaturase activity? | Hyperlipidemic hamster liver model |
How to Study the acyl-CoA desaturase activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Lipidomics | Saturated vs monounsaturated lipid species | Ferroptosis and membrane composition studies [1,2] |
| Enzymatic activity assay | Desaturase catalytic rate | Comparing activity across genotypes or drugs [7,8] |
| RNA-seq / qPCR | Desaturase gene expression | Transcriptional regulation in disease models [1,3,6] |
| CRISPR knockout | Loss-of-function phenotype | Testing causal requirement of SCD1 [1,2,3] |
| CRISPR point mutation | Specific residue function | Dissecting catalytic or regulatory domains |
| CRISPR knock-in | Tagged or reporter alleles | Tracking desaturase localization and dynamics |
| Overexpression | Gain-of-function effects | Testing sufficiency in reprogramming or ferroptosis |
| Pharmacological modulation | Drug effects on desaturase activity | Fibrate or extract studies in liver models [6,8] |
Lipidomics and fatty acid profiling
Mass spectrometry-based lipidomics measures the ratio of saturated to monounsaturated acyl-CoAs and phospholipids, providing a direct readout of acyl-CoA desaturase activity [1,2]. This approach is used to assess how genetic or pharmacological perturbations alter membrane composition and ferroptosis sensitivity [1,2].
Enzymatic activity assays
Desaturase activity can be measured using acyl-CoA substrates and reduced acceptors, monitoring product formation by chromatography or spectrophotometry [7,8]. These assays are used to compare enzyme activity across genotypes or treatments, such as fibrate exposure in HepG2 cells.
Gene expression analysis
RNA-seq and qPCR quantify SCD1, FADS2, and related lipogenic gene expression to determine whether changes in desaturase activity arise from transcriptional regulation [1,3,6]. This is particularly useful in models of autoimmunity, hyperlipidemia, and cancer [3,6].
CRISPR functional genomics
CRISPR knockout, point-mutation, and overexpression models enable causal testing of desaturase genes in disease-relevant phenotypes such as ferroptosis, Treg differentiation, and cardiac reprogramming [1,2,3,5]. These models distinguish whether a gene is required for the phenotype or merely correlated with it [1,5].
How CRISPR Can Be Used to Study GO:0016215 acyl-CoA desaturase activity
Knockout
CRISPR knockout of SCD1 or FADS2 eliminates acyl-CoA desaturase activity, enabling tests of whether the enzyme is required for ferroptosis sensitivity, Treg differentiation, or cardiac reprogramming [1,2,3,5]. Knockout models are essential for distinguishing causal roles from correlative associations in lipid metabolic pathways [1,5].
Point Mutation
Point mutations in desaturase genes can be introduced to dissect catalytic residues, oxygen activation, or regulatory phosphorylation sites. Such models help define the molecular determinants of acyl-CoA desaturase activity and its regulation by upstream signals [4,7].
Knock-in
Knock-in of tagged or reporter alleles allows tracking of desaturase protein localization, stability, and interaction partners in live cells. This is useful for understanding how desaturases integrate into membrane and lipid metabolic networks [1,2].
Overexpression
Overexpression of SCD1 or FADS2 tests whether increased desaturase activity is sufficient to alter ferroptosis sensitivity, lipid composition, or cell fate [2,5]. Overexpression models complement knockout studies by establishing sufficiency in disease-relevant phenotypes [2,5].
How EDITGENE Supports acyl-CoA desaturase activity Research
Researchers studying acyl-CoA desaturase activity-related genes often need to determine whether a candidate gene is causally involved in lipid metabolic phenotypes, ferroptosis, or immune cell differentiation. EDITGENE provides CRISPR-based cell model services that enable precise, reproducible functional interrogation of desaturase genes and their regulatory networks [1,2,3,4,5,6,7,8].
Contact EDITGENE today to design your custom CRISPR model for acyl-CoA desaturase activity research.
Related Products
| Product name | Cat.No. | Species | Gene ID | |
|---|---|---|---|---|
| SCD5 Knockout HEK293 Cell Line | EDJ-KQ1873 | Human | 79966 | Details Get a Quote |
| FADS2 Knockout HEK293 Cell Line | EDC09656 | Human | 9415 | Details Get a Quote |
| SCD5 Knockout A-549 Cell Line | EDJ-KQ20446 | Human | 79966 | Details Get a Quote |
| SCD5 Knockout HCT 116 Cell Line | EDJ-KQ21750 | Human | 79966 | Details Get a Quote |
| SCD5 Knockout HeLa Cell Line | EDJ-KQ21751 | Human | 79966 | Details Get a Quote |
| FADS2 Knockout A-549 Cell Line | EDJ-KQ30799 | Human | 9415 | Details Get a Quote |
| FADS2 Knockout HCT 116 Cell Line | EDJ-KQ30800 | Human | 9415 | Details Get a Quote |
| FADS2 Knockout HeLa Cell Line | EDJ-KQ30801 | Human | 9415 | Details Get a Quote |
Displaying Records 1 To 8 Of 8 Records
Frequently Asked Questions About acyl-CoA desaturase activity
What is acyl-CoA desaturase activity?
Acyl-CoA desaturase activity (GO:0016215) is a molecular function that catalyzes the reaction acyl-CoA + reduced acceptor + O2 = desaturated-acyl-CoA + acceptor + 2 H2O, introducing a double bond into an acyl-CoA substrate.
What genes are involved in acyl-CoA desaturase activity?
Key genes include SCD1 in mammals, SCD in yeast, and FADS2, which balances lipid metabolic activity with SCD1 in cancer cells [2,3,7].
What is the role of SCD1 in ferroptosis?
SCD1-mediated desaturation influences phospholipid composition and ferroptosis sensitivity, and SCD1/FADS2 balance regulates redox-driven ferroptosis in ovarian cancer ascites [1,2].
How is acyl-CoA desaturase activity regulated?
It is regulated by lactate-mediated AMPK signaling, transcription factors such as ZEB1, and pharmacological agents like fibrates that alter SCD expression [1,4,8].
Which diseases are linked to acyl-CoA desaturase activity?
It is linked to cancer ferroptosis, autoimmunity, cardiac reprogramming, and hyperlipidemia [1,2,3,5,6].
What is the reaction catalyzed by acyl-CoA desaturase?
The enzyme catalyzes acyl-CoA + reduced acceptor + O2 = desaturated-acyl-CoA + acceptor + 2 H2O.
Is acyl-CoA desaturase activity conserved?
Yes, acyl-CoA desaturase activity is conserved from yeast to mammals, with yeast desaturases serving as mechanistic models.
How can I study acyl-CoA desaturase activity in the lab?
Common methods include lipidomics, enzymatic activity assays, RNA-seq, and CRISPR knockout or overexpression models [1,2,5,7,8].
What is the synonym for GO:0016215?
The synonym is CoA desaturase activity.
Can CRISPR be used to model acyl-CoA desaturase function?
Yes, CRISPR knockout, point-mutation, knock-in, and overexpression models are used to test causal roles of desaturase genes in disease phenotypes [1,2,3,5].
Conclusion
Acyl-CoA desaturase activity (GO:0016215) is a conserved molecular function that introduces double bonds into acyl-CoA substrates, shaping membrane composition, redox balance, and cell fate. Its principal mammalian enzyme, SCD1, is implicated in cancer ferroptosis, autoimmunity, cardiac reprogramming, and hyperlipidemia, making it a high-priority target for functional genomics [1,2,3,4,5,6,7,8]. By combining QuickGO annotation with CRISPR-based cell models, researchers can move from correlation to causation in desaturase biology. EDITGENE supports this work with knockout, point-mutation, knock-in, overexpression, library screening, and bioinformatics services tailored to acyl-CoA desaturase research [1,2,3,4,5,6,7,8].
References
- 1. Schwab A et al.. 2024. Zeb1 mediates EMT/plasticity-associated ferroptosis sensitivity in cancer cells by regulating lipogenic enzyme expression and phospholipid composition.. Nat Cell Biol 26(9):1470-1481 PMID: 39009641
- 2. Xuan Y et al.. 2022. SCD1/FADS2 fatty acid desaturases equipoise lipid metabolic activity and redox-driven ferroptosis in ascites-derived ovarian cancer cells.. Theranostics 12(7):3534-3552 PMID: 35547771
- 3. Grajchen E et al.. 2023. Fatty acid desaturation by stearoyl-CoA desaturase-1 controls regulatory T cell differentiation and autoimmunity.. Cell Mol Immunol 20(6):666-679 PMID: 37041314
- 4. Zhao Y et al.. 2020. HCAR1/MCT1 Regulates Tumor Ferroptosis through the Lactate-Mediated AMPK-SCD1 Activity and Its Therapeutic Implications.. Cell Rep 33(10):108487 PMID: 33296645
- 5. Jia Z et al.. 2025. Enhanced fatty acid oxidation via SCD1 downregulation fuels cardiac reprogramming.. Mol Ther 33(4):1749-1768 PMID: 40007118
- 6. Carnuta MG et al.. 2018. Zingiber officinale extract administration diminishes steroyl-CoA desaturase gene expression and activity in hyperlipidemic hamster liver by reducing the oxidative and endoplasmic reticulum stress.. Phytomedicine 48:62-69 PMID: 30195881
- 7. Martin CE et al.. 2002. Yeast desaturases.. Biochem Soc Trans 30(Pt 6):1080-2 PMID: 12440977
- 8. Rodríguez C et al.. 2001. Differential induction of stearoyl-CoA desaturase and acyl-CoA oxidase genes by fibrates in HepG2 cells.. Biochem Pharmacol 61(3):357-64 PMID: 11172741
