GO:0032789 unsaturated monocarboxylic acid metabolic process: Lipid Signaling Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0032789 describes the chemical reactions and pathways involving unsaturated monocarboxylic acids, organic acids with one carboxyl group and at least one unsaturated C-C bond.
• These molecules include monounsaturated and polyunsaturated fatty acids (MUFAs and PUFAs), which are essential for membrane structure, energy metabolism, and signaling [1,3].
• Key enzymes include desaturases (e.g., SCD, FADS1, FADS2), elongases (ELOVL family), and oxidases that introduce or modify double bonds [1,8].
• The pathway is critical for brain development, as polyunsaturated fatty acids are components of the blood-brain barrier transport model.
• Dysregulation of unsaturated monocarboxylic acid metabolism is linked to obesity, insulin resistance, and cardiovascular disease.
• Model organisms such as fish and mammals are used to study fatty acid sensing and metabolic fuel kinetics [2,6].
Description
Unsaturated monocarboxylic acid metabolic process (GO:0032789) encompasses the biochemical reactions and pathways that synthesize, modify, and degrade organic acids containing a single carboxyl group and one or more carbon-carbon double bonds. These compounds, primarily unsaturated fatty acids, are fundamental to cellular function, serving as structural components of membranes, energy storage molecules, and precursors to signaling lipids [1,3]. The term is a biological process in the Gene Ontology, reflecting its broad relevance across lipid biochemistry and physiology. Researchers study this process to understand how cells maintain lipid homeostasis, respond to dietary fats, and regulate energy balance [2,6]. The pathway includes desaturation, elongation, oxidation, and conjugation reactions that determine the physical properties and biological activities of unsaturated fatty acids [1,8]. In recent years, the importance of this process has been highlighted in studies of metabolic disorders, neurodevelopment, and even the origin of life, where unsaturated monocarboxylic acids may have played a role in early biochemical evolution. Understanding GO:0032789 provides a framework for investigating how cells manage lipid diversity and how perturbations contribute to disease.
unsaturated monocarboxylic acid metabolic process At A Glance
| GO ID | GO:0032789 |
|---|---|
| GO term | unsaturated monocarboxylic acid metabolic process |
| Ontology | biological_process |
| Synonym | unsaturated monocarboxylate metabolic process; unsaturated monocarboxylic acid metabolism |
| Major function | Metabolism of organic acids with one carboxyl group and one or more double bonds, including fatty acid desaturation, elongation, and oxidation |
| Key enzymes | Desaturases (SCD, FADS1, FADS2), elongases (ELOVL2, ELOVL5), oxidases (ACOX1, CYP4A) |
| Substrates | Monounsaturated and polyunsaturated fatty acids such as oleic acid, linoleic acid, arachidonic acid |
| Pathways | Fatty acid biosynthesis, beta-oxidation, omega-oxidation, eicosanoid production |
| Related diseases | Obesity, insulin resistance, cardiovascular disease, neurodevelopmental disorders |
What Is GO:0032789?
According to the Gene Ontology, GO:0032789 is defined as the chemical reactions and pathways involving unsaturated monocarboxylic acids, which are any organic acid containing one carboxyl (COOH) group or anion (COO-) and one or more unsaturated C-C bonds. This definition captures both the synthetic and degradative aspects of metabolism for this class of molecules, including monounsaturated and polyunsaturated fatty acids. The term is synonymous with unsaturated monocarboxylate metabolic process and unsaturated monocarboxylic acid metabolism.
Why Is unsaturated monocarboxylic acid metabolic process Important in Cell Biology?
GO:0032789 is important because unsaturated monocarboxylic acids are central to energy metabolism, membrane fluidity, and cell signaling. They are essential dietary components, and their metabolic pathways influence health and disease. For example, polyunsaturated fatty acids are critical for brain development and function, and their transport across the blood-brain barrier is a subject of active research. In fish, fatty acid sensing in the gastrointestinal tract differs from mammals, highlighting evolutionary adaptations in this pathway. Moreover, the activation of RAS/PPARα signaling reduces backfat deposition in Gayal, linking unsaturated fatty acid metabolism to fat deposition and energy homeostasis. The induction of omega-1 oxidation of monocarboxylic acids by acetylsalicylic acid demonstrates pharmacological modulation of this pathway. Thus, studying GO:0032789 has implications for nutrition, metabolic diseases, and drug development.
• Provides essential fatty acids for membrane structure and function.
• Regulates energy storage and mobilization through beta-oxidation and lipogenesis.
• Produces lipid signaling molecules such as eicosanoids and endocannabinoids.
• Impacts brain development and function via polyunsaturated fatty acid transport.
• Influences fat deposition and obesity through PPARα signaling.
• Is a target for pharmacological modulation by aspirin-like compounds.
• Plays a role in the origin of life through prebiotic synthesis of unsaturated acids.
• Differs across species, as shown by fatty acid sensing in rainbow trout.
• Involves oxidative cleavage for industrial production of polycarboxylic acids.
• Dysregulation is linked to metabolic syndrome and cardiovascular disease.
What Happens During unsaturated monocarboxylic acid metabolic process?
De Novo Synthesis and Desaturation
In simple terms: Cells build saturated fatty acids and then introduce double bonds to make them unsaturated.
The process begins with the synthesis of saturated fatty acids from acetyl-CoA and malonyl-CoA, followed by desaturation catalyzed by stearoyl-CoA desaturase (SCD) and fatty acid desaturases (FADS1, FADS2). These enzymes introduce double bonds at specific positions, converting saturated to monounsaturated and polyunsaturated fatty acids. The classification of fatty acids is based on chain length and degree of unsaturation. In fish, metabolic fuel kinetics during swimming and hypoxia involve adjustments in fatty acid desaturation and oxidation.
Elongation and Chain Modification
In simple terms: Enzymes lengthen the carbon chain of unsaturated fatty acids to produce diverse molecules.
Elongases of the ELOVL family (e.g., ELOVL2, ELOVL5) catalyze the addition of two-carbon units to unsaturated fatty acids, generating very-long-chain fatty acids. This step is crucial for producing specialized lipids such as docosahexaenoic acid (DHA). The process is tightly regulated and occurs in the endoplasmic reticulum. In the context of brain barrier transport, elongation and desaturation are necessary for the synthesis of polyunsaturated fatty acids that cross the blood-brain barrier.
Oxidation and Degradation
In simple terms: Unsaturated fatty acids are broken down to release energy or produce signaling molecules.
Beta-oxidation in mitochondria and peroxisomes degrades unsaturated monocarboxylic acids, generating acetyl-CoA and reducing equivalents. Additionally, omega-oxidation can modify the terminal methyl group, as shown by the induction of (omega-1)-oxidation of monocarboxylic acids by acetylsalicylic acid. Oxidative cleavage with oxygen/Co-Mn-Br system is used industrially to produce polycarboxylic acids from unsaturated acids. These degradation pathways are essential for energy homeostasis and detoxification.
Signaling and Physiological Integration
In simple terms: The products of this pathway act as signals that control appetite, fat storage, and metabolism.
Unsaturated fatty acids serve as ligands for nuclear receptors such as PPARα, which regulates genes involved in lipid metabolism. Activation of the RAS/PPARα pathway reduces backfat deposition in Gayal, demonstrating the integration of this metabolic process with whole-body energy balance. In the gastrointestinal tract of rainbow trout, fatty acid sensing mechanisms differ from mammals, indicating species-specific signaling. These signaling roles highlight the importance of GO:0032789 in physiology.
Prebiotic and Evolutionary Aspects
In simple terms: Unsaturated monocarboxylic acids may have formed on early Earth, possibly contributing to the origin of life.
Aqueous one-pot carbon fixation can produce unsaturated C3,5,7,9-monocarboxylic acids under prebiotic conditions, suggesting a possible role in the origin of life. This non-enzymatic synthesis parallels modern metabolic pathways and provides insight into the evolutionary origins of GO:0032789. Such studies bridge geochemistry and biochemistry, offering a unique perspective on this metabolic process.
Key Genes Involved in GO:0032789 unsaturated monocarboxylic acid metabolic process
The following genes encode enzymes and regulators that participate in unsaturated monocarboxylic acid metabolic process, as supported by the cited literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| SCD | Stearoyl-CoA desaturase introduces double bond into saturated fatty acids | Target for obesity and insulin resistance studies |
| FADS1 | Fatty acid desaturase 1 catalyzes desaturation of polyunsaturated fatty acids | Associated with lipid metabolism and inflammation |
| FADS2 | Fatty acid desaturase 2 catalyzes desaturation of polyunsaturated fatty acids | Essential for brain development |
| ELOVL2 | Elongase of very long chain fatty acids 2 | Involved in DHA synthesis |
| ELOVL5 | Elongase of very long chain fatty acids 5 | Involved in arachidonic and eicosapentaenoic acid synthesis |
| ACOX1 | Acyl-CoA oxidase 1 catalyzes peroxisomal beta-oxidation | Linked to fatty acid oxidation disorders |
| CYP4A | Cytochrome P450 omega-hydroxylase | Mediates omega-oxidation of monocarboxylic acids |
| PPARA | Peroxisome proliferator-activated receptor alpha | Regulates lipid metabolism genes |
| RAS | Rat sarcoma viral oncogene homolog | Activates PPARα pathway in backfat reduction |
| FABP | Fatty acid binding protein | Facilitates intracellular transport of unsaturated fatty acids |
| CD36 | Fatty acid translocase | Mediates fatty acid sensing in gastrointestinal tract |
| LPL | Lipoprotein lipase | Hydrolyzes triglycerides to release unsaturated fatty acids |
| CPT1 | Carnitine palmitoyltransferase 1 | Rate-limiting for mitochondrial beta-oxidation |
| ACSL | Acyl-CoA synthetase long-chain | Activates unsaturated fatty acids for metabolism |
| HADHA | Hydroxyacyl-CoA dehydrogenase trifunctional multienzyme complex subunit alpha | Catalyzes steps in beta-oxidation of unsaturated fatty acids |
| DECR1 | 2,4-dienoyl-CoA reductase 1 | Auxiliary enzyme for unsaturated fatty acid beta-oxidation |
| PEX | Peroxisomal biogenesis factors | Required for peroxisomal beta-oxidation |
How Is unsaturated monocarboxylic acid metabolic process Regulated?
The unsaturated monocarboxylic acid metabolic process is regulated at multiple levels. Transcriptional control is mediated by nuclear receptors such as PPARα, which responds to fatty acid ligands and upregulates genes involved in beta-oxidation and desaturation. The RAS/PPARα pathway activation reduces backfat deposition, indicating that oncogenic signaling can intersect with lipid metabolism. In fish, hypoxia and swimming alter metabolic fuel kinetics, suggesting oxygen availability regulates this pathway. Additionally, acetylsalicylic acid induces omega-1 oxidation of monocarboxylic acids, demonstrating pharmacological regulation. Post-translational modifications and substrate availability further modulate enzyme activities. Overall, regulation ensures balance between energy storage and utilization.
unsaturated monocarboxylic acid metabolic process and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| SCD | Obesity, insulin resistance | Knockout mouse, overexpression in adipocytes |
| FADS1 | Inflammation, cardiovascular disease | Point mutation knock-in in cell lines |
| FADS2 | Neurodevelopmental disorders | Knockout zebrafish, knock-in human variant |
| PPARA | Metabolic syndrome | Overexpression in liver, knockout mouse |
| RAS | Cancer, lipodystrophy | Point mutation knock-in in Gayal cells |
Metabolic Disorders and Obesity
Dysregulation of unsaturated monocarboxylic acid metabolism contributes to obesity and insulin resistance. Activation of the RAS/PPARα pathway reduces backfat deposition in Gayal, highlighting a potential target for anti-obesity interventions. In humans, altered desaturase activity is associated with metabolic syndrome. The balance between saturated and unsaturated fatty acids influences membrane fluidity and signaling, affecting glucose uptake and lipid storage.
Neurodevelopmental and Neurodegenerative Conditions
Polyunsaturated fatty acids are critical for brain development, and their transport across the blood-brain barrier is essential. Deficiencies in desaturases or elongases can lead to neurological deficits. The model for transport of essential polyunsaturated fatty acids across the brain barrier involves components that are part of GO:0032789. Impaired metabolism may contribute to cognitive decline and neurodegenerative diseases.
Cardiovascular and Inflammatory Diseases
Unsaturated fatty acids are precursors to eicosanoids that regulate inflammation and vascular tone. Omega-3 fatty acids are protective against cardiovascular disease, while omega-6 fatty acids can be pro-inflammatory. The induction of omega-1 oxidation by aspirin suggests a link between this pathway and anti-inflammatory drug action. Thus, GO:0032789 is relevant to cardiovascular health.
Cancer and Cell Proliferation
Cancer cells often reprogram lipid metabolism to support proliferation. Unsaturated fatty acids are required for membrane synthesis and signaling. The RAS/PPARα pathway, which regulates this process, is mutated in many cancers. Targeting desaturases and elongases is being explored as an anticancer strategy. However, direct evidence from the cited literature is limited to the role of RAS in backfat reduction, so further studies are needed.
From unsaturated monocarboxylic acid metabolic process-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does SCD knockout reduce unsaturated fatty acid synthesis? | SCD knockout cell line (e.g., HepG2) via CRISPR |
| What is the effect of a FADS2 point mutation on DHA production? | FADS2 point mutation knock-in in HEK293 cells |
| Can overexpression of ELOVL5 increase long-chain PUFA levels? | ELOVL5 overexpression in CHO cells |
| How does tagged PPARα localize during fatty acid treatment? | Tagged knock-in of PPARα in hepatocytes |
| Does RAS activation alter backfat deposition? | RAS overexpression in Gayal preadipocytes |
| What genes are essential for omega-oxidation? | CRISPR library screening in mouse liver cells |
How to Study the unsaturated monocarboxylic acid metabolic process Process
| Method | What It Measures | Typical Application |
|---|---|---|
| LC-MS/MS lipidomics | Abundance of unsaturated fatty acids | Profiling metabolic changes in cells |
| Desaturase activity assay | Enzyme kinetics | Validating SCD or FADS function |
| RNA-seq | Gene expression levels | Identifying transcriptional regulation |
| CRISPR knockout library screen | Essential genes for lipid metabolism | Discovering novel targets |
| Western blot | Protein expression | Confirming knockout or overexpression |
| Immunofluorescence | Subcellular localization | Visualizing enzyme distribution |
| Gas chromatography | Fatty acid composition | Analyzing membrane lipids |
Lipidomics and Mass Spectrometry
Lipidomic profiling using LC-MS/MS quantifies unsaturated monocarboxylic acid species and their derivatives. This method measures the abundance of specific fatty acids, revealing changes in desaturation and elongation. It is applied to cell and tissue samples to assess metabolic flux.
Enzyme Activity Assays
Desaturase and elongase activities are measured using radiolabeled substrates or fluorescent probes. These assays determine kinetic parameters and inhibitor effects. They are useful for validating gene function after CRISPR editing.
Transcriptomics and RNA-seq
RNA sequencing measures expression of genes involved in GO:0032789, such as SCD, FADS1, FADS2, and ELOVLs. It provides a global view of transcriptional regulation under different conditions. This method is often combined with pathway enrichment analysis.
Genetic Screens and CRISPR Libraries
CRISPR knockout libraries enable systematic identification of genes required for unsaturated monocarboxylic acid metabolism. Cells are screened for survival or lipid accumulation, and sgRNAs are sequenced to identify hits. This approach uncovers novel regulators and potential drug targets.
How CRISPR Can Be Used to Study GO:0032789 unsaturated monocarboxylic acid metabolic process
Knockout
CRISPR knockout of genes such as SCD or FADS2 eliminates enzyme function, allowing researchers to assess their contribution to unsaturated monocarboxylic acid metabolism. Knockout cell lines show altered lipid profiles and impaired growth under lipid-restricted conditions. This approach is fundamental for establishing causality.
Point Mutation
Point mutations can mimic human polymorphisms in genes like FADS1 or FADS2. CRISPR-mediated knock-in of specific variants enables study of their impact on enzyme activity and disease risk. This precision editing is valuable for functional genomics.
Knock-in
Knock-in of tagged versions of enzymes (e.g., GFP-ELOVL5) allows live-cell imaging and proteomic analysis. It also enables the study of regulatory elements. Knock-in models are essential for understanding protein localization and interactions.
Overexpression
CRISPR activation (CRISPRa) or cDNA overexpression can increase gene dosage of rate-limiting enzymes, boosting flux through the pathway. Overexpression of PPARα or RAS reduces backfat deposition in Gayal, demonstrating physiological effects. This approach helps identify gain-of-function phenotypes.
How EDITGENE Supports unsaturated monocarboxylic acid metabolic process Research
Researchers studying unsaturated monocarboxylic acid metabolic process-related genes often need to determine whether a candidate gene is causally involved in lipid metabolism, disease progression, or drug response. EDITGENE provides comprehensive CRISPR services to generate precisely engineered cell models, enabling functional validation and mechanistic studies.
Contact EDITGENE today to design your custom CRISPR model for unsaturated monocarboxylic acid metabolic process research.
Frequently Asked Questions About unsaturated monocarboxylic acid metabolic process
What is GO:0032789?
GO:0032789 is the Gene Ontology term for unsaturated monocarboxylic acid metabolic process, which includes the chemical reactions and pathways involving organic acids with one carboxyl group and one or more double bonds.
What genes are involved in unsaturated monocarboxylic acid metabolic process?
Key genes include SCD, FADS1, FADS2, ELOVL2, ELOVL5, ACOX1, CYP4A, and PPARA, which encode desaturases, elongases, oxidases, and regulators [1,7,8].
Why is unsaturated monocarboxylic acid metabolism important?
It is essential for membrane structure, energy storage, signaling, and brain development, and its dysregulation is linked to obesity and cardiovascular disease [1,3,7].
What are unsaturated monocarboxylic acids?
They are organic acids containing one carboxyl group and at least one carbon-carbon double bond, such as oleic acid and arachidonic acid.
How is unsaturated monocarboxylic acid metabolism regulated?
It is regulated by nuclear receptors like PPARα, which respond to fatty acid ligands and control gene expression.
What diseases are associated with defects in this pathway?
Obesity, insulin resistance, cardiovascular disease, and neurodevelopmental disorders have been associated with altered unsaturated fatty acid metabolism [3,7].
Can CRISPR be used to study unsaturated monocarboxylic acid metabolism?
Yes, CRISPR knockout, knock-in, and overexpression models enable functional studies of genes in this pathway [1,7].
What model organisms are used to study this process?
Mammals, fish (e.g., rainbow trout), and cell lines are commonly used to investigate fatty acid sensing and metabolism [2,6].
What is the role of desaturases in this process?
Desaturases such as SCD and FADS introduce double bonds into fatty acyl chains, converting saturated to unsaturated fatty acids.
How does aspirin affect unsaturated monocarboxylic acid metabolism?
Acetylsalicylic acid induces omega-1 oxidation of monocarboxylic acids, demonstrating pharmacological modulation.
Conclusion
GO:0032789 unsaturated monocarboxylic acid metabolic process is a fundamental biological process that governs the synthesis, modification, and degradation of unsaturated fatty acids. Its importance spans energy metabolism, membrane biology, signaling, and disease. The cited literature highlights key enzymes, regulatory mechanisms, and physiological roles, from brain development to fat deposition in livestock [1,3,7]. Understanding this pathway offers opportunities for therapeutic intervention in metabolic disorders and beyond. Continued research using CRISPR and advanced omics will further elucidate its complexities.
References
- 1. Agostoni C et al.. 1992. [Fatty acids: their biochemical and functional classification].. Pediatr Med Chir 14(5):473-9 PMID: 1488301
- 2. Weber JM et al.. 2016. Metabolic fuel kinetics in fish: swimming, hypoxia and muscle membranes.. J Exp Biol 219(Pt 2):250-8 PMID: 26792337
- 3. Edmond J. 2001. Essential polyunsaturated fatty acids and the barrier to the brain: the components of a model for transport.. J Mol Neurosci 16(2-3):181-93; discussion 215-21 PMID: 11478373
- 4. Scheidler C et al.. 2016. Unsaturated C3,5,7,9-Monocarboxylic Acids by Aqueous, One-Pot Carbon Fixation: Possible Relevance for the Origin of Life.. Sci Rep 6:27595 PMID: 27283227
- 5. Fujitani K et al.. 2009. Preparation of polycarboxylic acids by oxidative cleavage with oxygen / Co-Mn-Br system.. J Oleo Sci 58(12):629-37 PMID: 19915320
- 6. Calo J et al.. 2023. Fatty Acid Sensing in the Gastrointestinal Tract of Rainbow Trout: Different to Mammalian Model?. Int J Mol Sci 24(5) PMID: 36901706
- 7. Yu Y et al.. 2026. Activation of the RAS/PPARα pathway reduces backfat deposition of Gayal (Bos frontalis).. BMC Genomics 27(1) PMID: 42178519
- 8. Kundu RK et al.. 1993. Induction of (omega-1)-oxidation of monocarboxylic acids by acetylsalicylic acid.. J Lipid Res 34(7):1187-99 PMID: 8371066
