GO:0006629 lipid metabolic process: Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0006629 lipid metabolic process describes all chemical reactions and pathways involving lipids, including fatty acids, phospholipids, sphingolipids, sterols, and other isoprenoids.
• Lipid metabolism is central to energy storage, membrane biogenesis, and signaling, and its dysregulation is linked to ferroptosis, metabolic syndrome, and cellular senescence [1,3,4].
• Key organelles such as lipid droplets and mitochondria interact dynamically to coordinate lipid storage, trafficking, and oxidation [5,6].
• mTORC1 and mTORC2 are master regulators that integrate nutrient signals to control lipid synthesis and catabolism.
• Altered lipid metabolism influences liver regeneration, endometrial receptivity, and the progression of age-related diseases [2,7].
• CRISPR-based knockout, knock-in, and overexpression models enable causal dissection of lipid metabolic genes in health and disease [1,4].
Description
Lipid metabolic process (GO:0006629) encompasses the chemical reactions and pathways involving lipids, a diverse group of hydrophobic or amphipathic molecules that include fatty acids, neutral fats, phospholipids, sphingolipids, sterols, and terpenes. This ontology term captures the full spectrum of lipid-related biochemistry, from synthesis and modification to degradation and transport, and it is fundamental to understanding how cells manage energy, build membranes, and transmit signals [1,4]. Researchers across cell biology, metabolism, and disease modeling rely on GO:0006629 to annotate gene function and to interpret high-throughput data, because lipid metabolism sits at the intersection of nutrient sensing, organelle communication, and stress responses [5,8]. Dysregulation of lipid metabolic process is a hallmark of many pathologies, including ferroptosis, metabolic syndrome, and age-related disorders, making it a high-priority target for mechanistic and therapeutic studies [1,3,4].
lipid metabolic process At A Glance
| GO ID | GO:0006629 |
|---|---|
| GO term | lipid metabolic process |
| Ontology | biological_process |
| Synonym | lipid metabolism |
| Major function | Chemical reactions and pathways involving lipids, including synthesis, modification, and degradation of fatty acids, phospholipids, sphingolipids, sterols, and other isoprenoids |
| Key organelles | Lipid droplets, mitochondria, endoplasmic reticulum, peroxisomes |
| Regulatory hubs | mTORC1, mTORC2, SREBP, PPARs |
| Disease relevance | Ferroptosis, metabolic syndrome, cellular senescence, liver regeneration, endometrial receptivity |
What Is GO:0006629?
According to the Gene Ontology, lipid metabolic process (GO:0006629) is defined as the chemical reactions and pathways involving lipids, which are compounds soluble in organic solvents but not, or only sparingly, in aqueous solvents. This includes fatty acids; neutral fats, other fatty-acid esters, and soaps; long-chain (fatty) alcohols and waxes; sphingoids and other long-chain bases; glycolipids, phospholipids, and sphingolipids; and carotenes, polyprenols, sterols, terpenes, and other isoprenoids. In essence, it covers all enzymatic steps that build, modify, or break down these molecules within a cell.
Why Is lipid metabolic process Important in Cell Biology?
Lipid metabolic process is essential for life because lipids serve as structural components of membranes, energy reservoirs, and signaling molecules. Its dysregulation contributes to a wide range of human diseases, from metabolic syndrome and hepatic injury to cancer and neurodegeneration [1,3,4]. Understanding the genes and pathways that control lipid metabolism provides mechanistic insights into disease and reveals potential therapeutic targets, as highlighted by studies on ferroptosis, liver regeneration, and endometrial receptivity [1,2,7].
• Lipid metabolism regulates ferroptosis, a form of regulated cell death implicated in cancer and neurodegeneration.
• It orchestrates liver regeneration through an integrated metabolic network.
• Disorders in lipid metabolism contribute to hepatic and renal injury in metabolic syndrome.
• Lipids and lipid metabolism are emerging targets for age-related diseases and cellular senescence.
• Lipid droplet-mitochondria contacts are critical for energy homeostasis and are disrupted in disease [5,6].
• mTORC1 and mTORC2 integrate nutrient signals to control lipid synthesis and catabolism.
• Lipid metabolism influences endometrial receptivity and fertility.
• It provides biomarkers and therapeutic targets for metabolic and inflammatory diseases [3,4].
• CRISPR screens can identify novel regulators of lipid metabolic pathways [1,4].
• Understanding lipid metabolism aids in developing drugs for obesity, diabetes, and cardiovascular disease [3,8].
What Happens During lipid metabolic process?
Fatty acid synthesis and elongation
In simple terms: The cell builds fatty acids from smaller building blocks.
Fatty acid synthesis begins with acetyl-CoA carboxylase converting acetyl-CoA to malonyl-CoA, followed by iterative elongation by fatty acid synthase. These reactions occur mainly in the cytoplasm and are regulated by nutrient status and hormones. The resulting fatty acids can be esterified into triglycerides or phospholipids for storage or membrane assembly [1,4].
Lipid droplet formation and dynamics
In simple terms: Lipids are packaged into droplets for storage and later use.
Lipid droplets are organelles that store neutral lipids and interact with mitochondria to coordinate energy metabolism. Their formation involves the synthesis and accumulation of triglycerides and sterol esters, and their turnover is regulated by lipases and autophagy. Dysregulation of lipid droplet dynamics is linked to metabolic diseases and ferroptosis [5,6].
Phospholipid and sphingolipid metabolism
In simple terms: The cell makes and remodels membrane lipids.
Phospholipids and sphingolipids are key components of cellular membranes. Their synthesis occurs in the endoplasmic reticulum and Golgi, and remodeling enzymes maintain membrane fluidity and signaling. Sphingolipid metabolism generates bioactive lipids such as ceramide and sphingosine-1-phosphate, which regulate cell survival and inflammation [1,4].
Cholesterol and isoprenoid biosynthesis
In simple terms: The cell produces cholesterol and related molecules for membranes and signaling.
The mevalonate pathway produces cholesterol, dolichols, and isoprenoids. This pathway is tightly regulated by SREBP transcription factors and provides precursors for steroid hormones, bile acids, and lipid anchors. Its dysregulation contributes to cardiovascular disease and cancer [3,8].
Lipid oxidation and energy production
In simple terms: Lipids are broken down to release energy.
Fatty acids are oxidized in mitochondria through beta-oxidation to generate acetyl-CoA, which enters the TCA cycle. This process is regulated by nutrient sensors such as mTORC1 and is essential during fasting and exercise. Defects in lipid oxidation lead to metabolic disorders and organ injury [2,3,8].
Key Genes Involved in GO:0006629 lipid metabolic process
The following genes and proteins are central to lipid metabolic process, as supported by the cited literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| ACACA | Acetyl-CoA carboxylase, catalyzes first step of fatty acid synthesis | Target for metabolic disorders and cancer |
| FASN | Fatty acid synthase, synthesizes palmitate | Linked to lipogenesis and ferroptosis |
| SCD | Stearoyl-CoA desaturase, introduces double bonds in fatty acids | Modulates membrane fluidity and ferroptosis sensitivity |
| CPT1A | Carnitine palmitoyltransferase 1A, rate-limiting for fatty acid oxidation | Regulates energy homeostasis and liver regeneration |
| DGAT1 | Diacylglycerol O-acyltransferase 1, synthesizes triglycerides | Lipid droplet formation and metabolic disease |
| PLIN2 | Perilipin 2, coats lipid droplets | Marker of lipid droplet accumulation and steatosis |
| SREBF1 | Sterol regulatory element-binding transcription factor 1 | Master regulator of lipogenesis |
| SREBF2 | Sterol regulatory element-binding transcription factor 2 | Regulates cholesterol biosynthesis |
| PPARA | Peroxisome proliferator-activated receptor alpha | Controls fatty acid oxidation and inflammation |
| PPARG | Peroxisome proliferator-activated receptor gamma | Adipogenesis and insulin sensitivity |
| MTOR | Mechanistic target of rapamycin kinase | Integrates nutrient signals to control lipid metabolism |
| RPTOR | Regulatory-associated protein of mTOR, part of mTORC1 | Regulates lipogenesis via SREBP |
| RICTOR | RPTOR independent companion of MTOR, part of mTORC2 | Controls lipogenesis and glucose metabolism |
| ACSL4 | Acyl-CoA synthetase long-chain family member 4 | Promotes ferroptosis by activating polyunsaturated fatty acids |
| LPCAT3 | Lysophosphatidylcholine acyltransferase 3 | Incorporates polyunsaturated fatty acids into phospholipids, affecting ferroptosis |
| GPX4 | Glutathione peroxidase 4 | Protects against lipid peroxidation and ferroptosis |
| CERS | Ceramide synthases | Regulate sphingolipid metabolism and cell death |
How Is lipid metabolic process Regulated?
Lipid metabolic process is regulated at multiple levels by nutrient-sensing pathways, transcription factors, and post-translational modifications. mTORC1 and mTORC2 are central regulators that integrate growth factor and nutrient signals to promote lipogenesis and inhibit catabolism. SREBP transcription factors control the expression of genes involved in fatty acid and cholesterol synthesis in response to sterol levels. PPARs sense fatty acids and regulate genes of oxidation and lipid transport. Additionally, AMPK and other kinases modulate lipid metabolism in response to energy stress. Dysregulation of these regulatory circuits contributes to metabolic diseases and cancer [1,3,8].
lipid metabolic process and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| ACSL4 | Ferroptosis, cancer | Knockout in cancer cell lines to assess ferroptosis sensitivity |
| GPX4 | Ferroptosis, neurodegeneration | Inducible knockout in neurons to study lipid peroxidation |
| PPARA | Metabolic syndrome, fatty liver | Liver-specific knockout in mice to study steatosis |
| SREBF1 | Obesity, insulin resistance | Overexpression in hepatocytes to model lipogenesis |
| MTOR | Cancer, metabolic disorders | Conditional knockout to dissect mTORC1/2 roles in lipid metabolism |
Lipid metabolism in ferroptosis and cancer
Ferroptosis is an iron-dependent form of cell death driven by lipid peroxidation. Lipid metabolic enzymes such as ACSL4 and LPCAT3 promote ferroptosis by enriching membranes with polyunsaturated fatty acids, while GPX4 detoxifies lipid peroxides. Targeting lipid metabolism is a promising strategy to induce ferroptosis in cancer cells.
Metabolic syndrome and organ injury
Disorders of lipid metabolism contribute to hepatic and renal injury in metabolic syndrome. Excess lipid accumulation leads to lipotoxicity, inflammation, and fibrosis in the liver and kidney. Key regulators include PPARs and SREBPs, which are being explored as therapeutic targets.
Lipid metabolism in cellular senescence and aging
Cellular senescence is accompanied by profound changes in lipid metabolism, including increased lipogenesis and altered lipid droplet dynamics. These changes contribute to the senescence-associated secretory phenotype and age-related diseases. Targeting lipid metabolic pathways may delay aging and mitigate age-related pathologies.
Lipid metabolism and liver regeneration
Liver regeneration requires coordinated lipid metabolic reprogramming to provide energy and membrane components for proliferating hepatocytes. An integrated metabolic network involving fatty acid oxidation and lipogenesis supports regeneration, and its disruption impairs recovery after injury.
From lipid metabolic process-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X regulate fatty acid synthesis? | Knockout of gene X in hepatocytes followed by lipidomics |
| Does a point mutation in gene Y alter enzyme activity? | CRISPR point mutation knock-in in cell lines |
| How does gene Z affect lipid droplet dynamics? | Knock-in of fluorescent tag on gene Z for live imaging |
| Can overexpression of gene W protect against ferroptosis? | Overexpression of gene W in cancer cells treated with ferroptosis inducers |
| What is the role of gene V in liver regeneration? | Liver-specific knockout in mice subjected to partial hepatectomy |
| Does gene U regulate cholesterol biosynthesis? | CRISPR activation (CRISPRa) to overexpress gene U in vitro |
How to Study the lipid metabolic process Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Lipidomics (LC-MS) | Lipid species abundance and composition | Profiling changes in fatty acids and phospholipids |
| CRISPR knockout screen | Gene essentiality for lipid accumulation | Identifying regulators of lipid droplets |
| RNA-seq | Transcriptional changes in lipid metabolic genes | Assessing SREBP/PPAR target gene expression |
| Western blot | Protein levels of lipid enzymes | Validating knockout or overexpression |
| Fluorescence microscopy | Lipid droplet number, size, and localization | Studying lipid droplet dynamics |
| Seahorse assay | Fatty acid oxidation rate | Measuring mitochondrial fuel use |
| Isotope tracing | Metabolic flux through lipid pathways | Quantifying de novo lipogenesis |
Lipidomics and mass spectrometry
Mass spectrometry-based lipidomics enables comprehensive profiling of lipid species, revealing changes in fatty acids, phospholipids, and sphingolipids. This method is essential for quantifying lipid metabolic flux and identifying biomarkers in disease models [1,4].
CRISPR screens for lipid metabolism
Genome-wide CRISPR knockout or activation screens can identify genes that regulate lipid accumulation, ferroptosis sensitivity, or lipid droplet formation. These screens are powerful for discovering novel regulators of lipid metabolic process [1,4].
Imaging of lipid droplets and organelles
Fluorescence microscopy with lipid droplet dyes (e.g., BODIPY) and tagged proteins allows visualization of lipid droplet dynamics and contacts with mitochondria. Live-cell imaging provides spatiotemporal insights into lipid metabolism [5,6].
Metabolic flux analysis
Stable isotope tracing combined with mass spectrometry measures metabolic fluxes through lipid synthesis and oxidation pathways. This approach quantifies how genetic perturbations alter lipid metabolism [2,8].
How CRISPR Can Be Used to Study GO:0006629 lipid metabolic process
Knockout
CRISPR knockout is used to delete genes involved in lipid metabolism, such as ACSL4 or GPX4, to study their roles in ferroptosis and lipid peroxidation. Knockout cell lines and animal models provide causal evidence for gene function in lipid metabolic process [1,4].
Point Mutation
Point mutations can be introduced to model disease-associated variants or to dissect catalytic residues in lipid enzymes. For example, point mutations in SREBF1 can alter its transcriptional activity, affecting lipogenesis.
Knock-in
Knock-in of fluorescent tags or reporter genes allows real-time tracking of lipid metabolic proteins and their localization to lipid droplets or mitochondria. This approach is valuable for studying dynamic processes such as lipid droplet turnover [5,6].
Overexpression
Overexpression of lipid metabolic genes, such as FASN or SCD, can drive lipogenesis and alter sensitivity to ferroptosis. Overexpression models are used to test gain-of-function effects and to identify therapeutic targets [1,4].
How EDITGENE Supports lipid metabolic process Research
Researchers studying lipid metabolic process-related genes often need to determine whether a candidate gene is causally involved in lipid synthesis, storage, or oxidation. EDITGENE provides a comprehensive suite of CRISPR services to enable precise genetic manipulation and functional validation in relevant cell models.
Contact EDITGENE today to design your custom CRISPR model for lipid metabolic process research.
Frequently Asked Questions About lipid metabolic process
What is lipid metabolic process GO:0006629?
GO:0006629 is a Gene Ontology term describing the chemical reactions and pathways involving lipids, including fatty acids, phospholipids, sphingolipids, sterols, and other isoprenoids.
What genes are involved in lipid metabolic process?
Key genes include ACACA, FASN, SCD, CPT1A, DGAT1, PLIN2, SREBF1, SREBF2, PPARA, PPARG, MTOR, ACSL4, LPCAT3, and GPX4, among others [1,3,8].
How is lipid metabolism regulated?
Lipid metabolism is regulated by nutrient sensors such as mTORC1 and mTORC2, transcription factors like SREBPs and PPARs, and post-translational modifications.
What diseases are associated with lipid metabolism disorders?
Disorders of lipid metabolism are linked to ferroptosis, metabolic syndrome, hepatic and renal injury, cellular senescence, and age-related diseases [1,3,4].
How can CRISPR be used to study lipid metabolism?
CRISPR knockout, knock-in, point mutation, and overexpression models allow functional dissection of lipid metabolic genes in cell lines and animal models [1,4].
What is the role of lipid droplets in lipid metabolism?
Lipid droplets store neutral lipids and interact with mitochondria to coordinate energy metabolism; their dynamics are regulated by proteins like PLIN2 and DGAT1 [5,6].
What is ferroptosis and how does lipid metabolism affect it?
Ferroptosis is an iron-dependent cell death driven by lipid peroxidation; enzymes like ACSL4 and GPX4 modulate ferroptosis sensitivity.
Which organelles are involved in lipid metabolic process?
The endoplasmic reticulum, mitochondria, peroxisomes, and lipid droplets are major sites of lipid metabolism [5,6].
How does mTOR regulate lipid metabolism?
mTORC1 promotes lipogenesis through SREBP activation, while mTORC2 also contributes to lipid synthesis and glucose metabolism.
What methods are used to study lipid metabolism?
Common methods include lipidomics, CRISPR screens, RNA-seq, fluorescence microscopy, and metabolic flux analysis [1,4,5].
Conclusion
Lipid metabolic process (GO:0006629) is a fundamental biological process that encompasses the synthesis, modification, and degradation of lipids. Its dysregulation is central to numerous diseases, including ferroptosis, metabolic syndrome, and age-related disorders. Advances in CRISPR-based models and multi-omics technologies are accelerating the discovery of new regulators and therapeutic targets. EDITGENE provides the tools and expertise to support these investigations, from knockout and knock-in models to library screening and bioinformatics.
References
- 1. Pope LE et al.. 2023. Regulation of ferroptosis by lipid metabolism.. Trends Cell Biol 33(12):1077-1087 PMID: 37407304
- 2. Duan L et al.. 2025. Lipid metabolism orchestrates liver regeneration: an integrated metabolic network.. J Transl Med 23(1):1115 PMID: 41102808
- 3. Rong J et al.. 2024. Mechanisms of hepatic and renal injury in lipid metabolism disorders in metabolic syndrome.. Int J Biol Sci 20(12):4783-4798 PMID: 39309427
- 4. Zeng Q et al.. 2024. Lipids and lipid metabolism in cellular senescence: Emerging targets for age-related diseases.. Ageing Res Rev 97:102294 PMID: 38583577
- 5. Fan H et al.. 2024. Lipid Droplet-Mitochondria Contacts in Health and Disease.. Int J Mol Sci 25(13) PMID: 38999988
- 6. Wang G et al.. 2025. Interactions between lipid droplets and mitochondria in metabolic diseases.. Lipids Health Dis 24(1):357 PMID: 41219930
- 7. Yang T et al.. 2022. Lipid metabolism and endometrial receptivity.. Hum Reprod Update 28(6):858-889 PMID: 35639910
- 8. Szwed A et al.. 2021. Regulation and metabolic functions of mTORC1 and mTORC2.. Physiol Rev 101(3):1371-1426 PMID: 33599151
