GO:1900535 palmitic acid biosynthetic process: Fatty Acid Synthesis Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1900535 (palmitic acid biosynthetic process) is the biological process by which cells synthesize palmitic acid (C16:0), the saturated fatty acid that serves as the precursor for longer, desaturated and complex lipids.
• Palmitic acid is the end product of de novo fatty acid synthesis and a central node in lipotoxicity, cardiometabolic risk and tumor biology [2,3,6].
• Excess palmitic acid drives mitochondrial depolarization, apoptosis and lipid accumulation in metabolically active tissues such as brown adipose tissue and cardiomyocytes [1,8].
• Palmitic acid is not only a fuel molecule; it is a substrate for protein palmitoylation, a lipid modification that regulates innate antiviral immunity.
• The process is studied with isotope tracing, lipidomics, 3D liver-on-chip systems and CRISPR-based gene editing of fatty acid synthesis enzymes.
• EDITGENE provides knockout, point-mutation, knock-in, overexpression cell models and CRISPR library screening to dissect palmitic acid biosynthetic process genes.
Description
GO:1900535, palmitic acid biosynthetic process, is the biological process defined by the Gene Ontology as the chemical reactions and pathways resulting in the formation of palmitic acid. Palmitic acid (hexadecanoic acid, C16:0) is the first fully saturated long-chain fatty acid produced by de novo lipogenesis and the principal product of the fatty acid synthase reaction cycle. Because it is the metabolic precursor of stearic acid, oleic acid and complex lipids, the regulation of this process determines the saturated fatty acid composition of membranes, lipoproteins and lipid droplets [2,6]. Researchers study GO:1900535 because its flux is altered in obesity, insulin resistance, cardiovascular disease and cancer, and because palmitic acid itself acts as a signaling and lipotoxic molecule [2,3,6]. Recent work shows that palmitic acid can induce UCP1-independent mitochondrial depolarization specifically in brown adipose tissue, promote antiviral innate immunity through ZDHHC20-mediated CMPK2 palmitoylation, and drive differential lipotoxic patterns in 3D liver models. Understanding the biosynthetic process therefore connects core intermediary metabolism to immunology, oncology and cardiometabolic disease [1,3,4,5,8].
palmitic acid biosynthetic process At A Glance
| GO ID | GO:1900535 |
|---|---|
| GO term | palmitic acid biosynthetic process |
| Ontology | biological_process |
| Synonym | none listed in QuickGO |
| Major function | Formation of palmitic acid (C16:0), the end product of de novo fatty acid synthesis and precursor of longer and unsaturated fatty acids |
| Pathway context | De novo lipogenesis; acetyl-CoA and malonyl-CoA dependent |
| Key product | Palmitic acid (hexadecanoic acid, 16:0) |
| Related processes | Fatty acid elongation, desaturation, protein palmitoylation and lipotoxicity [2,4] |
| Disease relevance | Cardiometabolic risk, lipotoxic tissue injury, tumor metabolism and innate immunity [2,3,4,6,8] |
What Is GO:1900535?
In our own words, GO:1900535 describes the set of enzymatic reactions and regulatory pathways that build palmitic acid from smaller carbon units, principally acetyl-CoA and malonyl-CoA, through the fatty acid synthase cycle. The term covers the formation of the C16:0 saturated acyl chain, its release from the synthase complex, and the immediate metabolic context in which palmitic acid is generated for membrane, storage and signaling lipids [2,6]. It is a child of fatty acid biosynthetic process and is distinct from the degradation or elongation of palmitic acid.
Why Is palmitic acid biosynthetic process Important in Cell Biology?
GO:1900535 matters because palmitic acid is the central saturated fatty acid produced by human cells and the branching point for the synthesis of stearic acid, oleic acid and complex lipids. Its overproduction or excess exposure is linked to cardiometabolic risk markers, adipocyte hypertrophy, cardiomyocyte apoptosis and tumor-associated nerve remodeling [3,6,7,8]. At the same time, palmitic acid is required for protein palmitoylation, a modification that can enhance antiviral innate immunity. Studying the biosynthetic process therefore informs nutrition, lipidology, oncology and immunology, and provides targets for metabolic disease intervention [2,3,4,6].
• Palmitic acid is the end product of de novo fatty acid synthesis and the precursor of longer and unsaturated fatty acids.
• Dietary and endogenous palmitic acid intake is associated with cardiometabolic risk markers.
• Palmitic acid induces UCP1-independent mitochondrial depolarization in brown adipose tissue.
• Chronic palmitic acid exposure causes adipocyte hypertrophy and altered batokine gene expression.
• Palmitic acid promotes apoptosis and lipid accumulation in cardiomyocytes unless AMPK is active.
• Palmitic acid supports tumor-associated nerve biology, linking lipogenesis to cancer progression.
• Palmitic acid enhances antiviral innate immunity via ZDHHC20-mediated CMPK2 palmitoylation.
• 3D liver-on-chip models reveal differential and synergistic lipotoxic patterns of palmitic and oleic acid.
• The process is a target for metabolic, cardiovascular and oncology research [2,3,6,8].
• CRISPR editing of fatty acid synthesis genes enables causal testing of GO:1900535 in human cell models.
What Happens During palmitic acid biosynthetic process?
Substrate supply and acetyl-CoA carboxylation
In simple terms: The cell first makes the building blocks for palmitic acid.
Palmitic acid biosynthesis begins with acetyl-CoA, which is carboxylated to malonyl-CoA, the committed substrate for fatty acid synthesis. This step links carbohydrate and amino acid catabolism to lipogenesis and determines the carbon flux into the palmitic acid biosynthetic process. In metabolic tissues, excess substrate supply increases the formation of palmitic acid and its incorporation into storage and membrane lipids [2,6].
Fatty acid synthase cycle and chain elongation
In simple terms: A molecular assembly line adds two carbons at a time until the chain reaches 16 carbons.
The fatty acid synthase cycle repeatedly condenses, reduces, dehydrates and reduces acyl intermediates, extending the chain by two carbons per cycle until palmitic acid is released. Palmitic acid is the principal saturated product of this cycle and the substrate for downstream elongation and desaturation. The process is therefore the biosynthetic origin of the 16:0 acyl chain found in membranes, lipoproteins and lipid droplets [2,6].
Release, partitioning and lipid incorporation
In simple terms: Once made, palmitic acid is sent to membranes, storage droplets or signaling pathways.
Newly synthesized palmitic acid is released from the synthase and partitioned into glycerolipids, sphingolipids and cholesterol esters, or used as a substrate for protein palmitoylation [2,4]. This partitioning determines whether palmitic acid acts as a structural lipid, a storage fuel or a signaling molecule [2,4]. In liver-on-chip models, palmitic acid and oleic acid show differential and synergistic lipotoxic patterns, indicating that the fate of the newly synthesized fatty acid depends on the lipid environment.
Lipotoxic and signaling consequences
In simple terms: Too much palmitic acid can damage cells and change how they signal.
Excess palmitic acid induces UCP1-independent mitochondrial depolarization in brown adipose tissue, causes adipocyte hypertrophy and altered batokine gene expression in brown adipocytes, and promotes apoptosis and lipid accumulation in cardiomyocytes unless AMPK is activated. Palmitic acid also supports tumor-associated nerve biology and enhances antiviral innate immunity through ZDHHC20-mediated CMPK2 palmitoylation. These outcomes show that the biosynthetic process is tightly coupled to stress, immune and metabolic signaling [1,3,4,7,8].
Regulation by energy and stress sensors
In simple terms: The cell switches palmitic acid production on or off depending on its energy status.
AMPK activation prevents palmitic acid-induced apoptosis and lipid accumulation in cardiomyocytes, indicating that energy-sensing pathways restrain the harmful consequences of excess palmitic acid. Because palmitic acid is the end product of de novo lipogenesis, its biosynthetic process is responsive to nutritional and hormonal signals that control fatty acid synthesis [2,6]. This regulation is central to understanding how the process contributes to cardiometabolic risk and tissue lipotoxicity [2,6,8].
Key Genes Involved in GO:1900535 palmitic acid biosynthetic process
The genes and proteins below are the principal enzymes, regulators and downstream effectors connected to the palmitic acid biosynthetic process and its physiological consequences.
| Gene | Major Role | Research Relevance |
|---|---|---|
| FASN | Fatty acid synthase; catalyzes the cycle that produces palmitic acid | Core enzyme of GO:1900535; target for lipogenesis studies |
| ACACA | Acetyl-CoA carboxylase alpha; produces malonyl-CoA for fatty acid synthesis | Rate-limiting substrate supply for palmitic acid biosynthesis |
| ACACB | Acetyl-CoA carboxylase beta; regulates fatty acid oxidation and synthesis balance | Metabolic control of lipogenesis |
| SCD | Stearoyl-CoA desaturase; desaturates palmitic acid to palmitoleic acid | Determines the fate of newly synthesized palmitic acid |
| ELOVL6 | Elongation of very long chain fatty acids protein 6; elongates C16 to C18 | Links palmitic acid to stearic acid production |
| PRKAA1 | AMPK catalytic subunit alpha 1; energy sensor | AMPK prevents palmitic acid-induced apoptosis and lipid accumulation |
| PRKAA2 | AMPK catalytic subunit alpha 2; energy sensor | Mediates protective metabolic responses to palmitic acid |
| UCP1 | Uncoupling protein 1; brown adipose tissue thermogenesis | Palmitic acid induces UCP1-independent mitochondrial depolarization |
| ZDHHC20 | Palmitoyltransferase; mediates protein palmitoylation | Required for palmitic acid-enhanced antiviral innate immunity |
| CMPK2 | Cytidine monophosphate kinase 2; innate immune effector | Palmitoylated by ZDHHC20 in response to palmitic acid |
| PPARA | Peroxisome proliferator-activated receptor alpha; lipid oxidation regulator | Counter-regulates lipogenic flux |
| PPARG | Peroxisome proliferator-activated receptor gamma; adipocyte differentiation | Adipocyte hypertrophy under chronic palmitic acid exposure |
| SREBF1 | Sterol regulatory element-binding transcription factor 1; lipogenic transcription | Transcriptional control of fatty acid synthesis genes |
| MLXIPL | Carbohydrate-responsive element-binding protein; lipogenic transcription | Links carbohydrate availability to palmitic acid synthesis |
| CD36 | Fatty acid translocase; uptake of exogenous palmitic acid | Determines intracellular palmitic acid load |
| CASP3 | Caspase 3; apoptosis executioner | Palmitic acid-induced apoptosis in cardiomyocytes |
| MAPK8 | JNK stress kinase; lipotoxic signaling | Stress response to palmitic acid |
| NFE2L2 | NRF2; oxidative stress response | Cellular defense against palmitic acid lipotoxicity |
How Is palmitic acid biosynthetic process Regulated?
The palmitic acid biosynthetic process is regulated by energy and nutrient sensors that balance synthesis against oxidation. AMPK activation prevents palmitic acid-induced apoptosis and lipid accumulation in cardiomyocytes, showing that energy stress restrains the harmful consequences of excess palmitic acid. Because palmitic acid is the end product of de novo lipogenesis, its production is coupled to substrate availability and to transcriptional programs that control fatty acid synthesis [2,6]. Chronic palmitic acid exposure also alters adipocyte gene expression, including batokine genes, indicating feedback regulation at the level of adipose tissue function. In the immune system, palmitic acid availability controls ZDHHC20-mediated CMPK2 palmitoylation and downstream antiviral responses, adding a post-translational layer of regulation.
palmitic acid biosynthetic process and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| FASN | Lipogenesis-driven cardiometabolic and tumor biology | FASN knockout HepG2 cells with palmitic acid tracing [2,5] |
| PRKAA1 | Cardiomyocyte apoptosis and lipid accumulation | AMPK knockout or point-mutation cardiomyocytes |
| ZDHHC20 | Antiviral innate immunity | ZDHHC20 knockout cells with palmitic acid treatment |
| UCP1 | Brown adipose tissue mitochondrial depolarization | UCP1 knockout brown adipocytes |
| PPARG | Adipocyte hypertrophy and batokine expression | PPARG knockout T37i brown adipocytes |
Cardiometabolic disease and lipotoxicity
Palmitic acid metabolism is closely linked to cardiometabolic risk markers, and dietary or endogenous excess is associated with adverse lipid profiles [2,6]. In cardiomyocytes, palmitic acid induces apoptosis and lipid accumulation, effects that are prevented by AMPK activation. Chronic palmitic acid exposure causes adipocyte hypertrophy and altered batokine gene expression in brown adipocytes, linking the biosynthetic process to adipose tissue dysfunction. These findings position GO:1900535 as a mechanistic node in obesity, insulin resistance and cardiovascular disease [2,6,7,8].
Cancer and tumor metabolism
Palmitic acid enables tumor-associated nerve biology, suggesting that lipogenesis supports the neural microenvironment of tumors. Because palmitic acid is the end product of de novo fatty acid synthesis, cancer cells with high lipogenic flux may depend on this process for membrane and signaling lipids [2,3]. Targeting the palmitic acid biosynthetic process is therefore of interest in oncology research [2,3].
Innate immunity and host defense
Palmitic acid promotes antiviral innate immunity via ZDHHC20-mediated CMPK2 palmitoylation, demonstrating that the fatty acid is a direct regulator of immune signaling. This connects the biosynthetic process to host defense and suggests that lipid availability can shape antiviral responses.
Liver injury and metabolic liver disease
In 3D HepG2/C3A liver-on-chip tissue, palmitic acid and oleic acid show differential and synergistic lipotoxic patterns, providing a human-relevant model of fatty liver injury. This system allows researchers to study how the palmitic acid biosynthetic process contributes to hepatocellular stress and lipid accumulation.
From palmitic acid biosynthetic process-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is FASN required for palmitic acid production? | FASN knockout cell line |
| Does AMPK protect against palmitic acid lipotoxicity? | PRKAA1/PRKAA2 point-mutation or knockout cardiomyocytes |
| Does palmitic acid enhance antiviral immunity? | ZDHHC20 knockout with CMPK2 palmitoylation readout |
| How does palmitic acid affect brown adipocyte mitochondria? | UCP1 knockout brown adipocytes |
| What is the lipotoxic signature of palmitic acid in liver? | 3D HepG2/C3A liver-on-chip |
| Can a candidate gene be causally linked to GO:1900535? | CRISPR knockout, knock-in or overexpression cell models |
How to Study the palmitic acid biosynthetic process Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Lipidomics | Palmitic acid and complex lipid species | Quantifying GO:1900535 output [2,5] |
| Isotope tracing | Carbon flux into palmitic acid | Measuring de novo lipogenesis |
| Liver-on-chip | Lipotoxic response in 3D liver tissue | Palmitic and oleic acid synergy |
| Mitochondrial depolarization assay | UCP1-independent mitochondrial effects | Brown adipose tissue response |
| Apoptosis assay | Caspase activation and cell death | Cardiomyocyte lipotoxicity |
| Palmitoylation assay | Protein palmitoylation status | ZDHHC20-CMPK2 innate immunity |
| Adipocyte hypertrophy assay | Adipocyte size and batokine expression | Brown adipocyte dysfunction |
| CRISPR gene editing | Causal gene function | Knockout, knock-in and overexpression models |
Lipidomics and isotope tracing
Lipidomic profiling and stable-isotope tracing quantify palmitic acid synthesis and its incorporation into complex lipids [2,5]. These methods are used to measure flux through GO:1900535 in cells and tissues [2,5].
3D liver-on-chip and organotypic models
Liver-on-chip technology with HepG2/C3A tissue reveals differential and synergistic lipotoxic patterns of palmitic acid and oleic acid, providing a physiologically relevant platform for studying the biosynthetic process.
Mitochondrial and metabolic assays
Mitochondrial depolarization assays in brown adipose tissue show that palmitic acid acts independently of UCP1, linking the biosynthetic process to organelle function. AMPK-dependent apoptosis and lipid accumulation assays in cardiomyocytes provide complementary readouts.
Immune and palmitoylation assays
Palmitoylation assays and antiviral innate immunity readouts can test whether palmitic acid controls ZDHHC20-mediated CMPK2 modification. These approaches connect the biosynthetic process to host defense.
How CRISPR Can Be Used to Study GO:1900535 palmitic acid biosynthetic process
Knockout
CRISPR knockout of fatty acid synthesis genes such as FASN or ACACA can test whether palmitic acid production is required for a given phenotype. Knockout models are used to determine causal roles of GO:1900535 genes in lipotoxicity and immunity [2,4].
Point Mutation
Point-mutation models can dissect catalytic residues or regulatory phosphorylation sites in enzymes and sensors such as AMPK subunits. These models help distinguish enzymatic activity from scaffolding functions in the palmitic acid biosynthetic process.
Knock-in
Knock-in of tagged or reporter alleles allows tracking of palmitic acid synthesis enzymes and their localization in live cells [2,5]. Tagged knock-in models support imaging and proteomic analysis of the biosynthetic machinery [2,5].
Overexpression
Overexpression of lipogenic genes increases flux through GO:1900535 and can model excess palmitic acid production in metabolic and cancer cells [2,3]. Overexpression models are useful for testing whether increased palmitic acid synthesis is sufficient to drive a phenotype [2,3].
How EDITGENE Supports palmitic acid biosynthetic process Research
Researchers studying palmitic acid biosynthetic process-related genes often need to determine whether a candidate gene is causally involved in palmitic acid production, lipotoxicity or immune signaling. EDITGENE provides publication-ready CRISPR cell models and screening services to test these hypotheses directly in human cells.
Contact EDITGENE today to design your custom CRISPR model for palmitic acid biosynthetic process research.
Frequently Asked Questions About palmitic acid biosynthetic process
What is GO:1900535 palmitic acid biosynthetic process?
GO:1900535 is the Gene Ontology biological process describing the chemical reactions and pathways that form palmitic acid, the C16:0 saturated fatty acid produced by de novo lipogenesis.
What genes are involved in palmitic acid biosynthetic process?
Key genes include FASN, ACACA, ACACB, SCD and ELOVL6, which catalyze and regulate the synthesis and fate of palmitic acid.
Why is palmitic acid important in metabolism?
Palmitic acid is the end product of fatty acid synthesis and the precursor of longer and unsaturated fatty acids, making it central to membrane and energy metabolism [2,6].
How does palmitic acid cause lipotoxicity?
Excess palmitic acid induces mitochondrial depolarization in brown adipose tissue, apoptosis and lipid accumulation in cardiomyocytes, and adipocyte hypertrophy in brown adipocytes [1,7,8].
Does palmitic acid affect the immune system?
Yes, palmitic acid promotes antiviral innate immunity via ZDHHC20-mediated CMPK2 palmitoylation.
What diseases are linked to palmitic acid biosynthesis?
Cardiometabolic disease, lipotoxic tissue injury, tumor metabolism and liver lipid stress are linked to palmitic acid metabolism [2,3,5,6,8].
How can I study palmitic acid biosynthetic process in the lab?
Lipidomics, isotope tracing, 3D liver-on-chip models and CRISPR gene editing are commonly used to study this process [2,5].
Can CRISPR knockout help study palmitic acid synthesis genes?
Yes, CRISPR knockout of FASN, ACACA or related genes can test whether they are required for palmitic acid production and downstream phenotypes.
What is the role of AMPK in palmitic acid lipotoxicity?
AMPK activation prevents palmitic acid-induced apoptosis and lipid accumulation in cardiomyocytes.
Does palmitic acid act independently of UCP1 in brown fat?
Yes, palmitic acid induces UCP1-independent mitochondrial depolarization specifically in brown adipose tissue.
Conclusion
GO:1900535, palmitic acid biosynthetic process, is a central metabolic pathway that produces the C16:0 fatty acid used for membranes, storage and signaling. Its dysregulation is linked to cardiometabolic risk, lipotoxic tissue injury, tumor biology and innate immunity [1,3,4,6,7,8]. CRISPR-based cell models and lipidomic methods now allow researchers to test causal roles of specific genes in this process [2,5]. EDITGENE supports these efforts with knockout, point-mutation, knock-in, overexpression and screening services.
References
- 1. Ishikawa Y et al.. 2026. Palmitic acid induces UCP1-independent mitochondrial depolarization specifically in brown adipose tissue.. J Biol Chem 302(3):111177 PMID: 41570989
- 2. Guyton JR et al.. 2023. Advances in understanding palmitic acid metabolism and health risks.. J Clin Lipidol 17(5):571-572 PMID: 37806801
- 3. Alkan HF et al.. 2022. Palmitic acid: Enabling the tumor's nerves.. Cell Metab 34(1):7-9 PMID: 34986339
- 4. Wang Y et al.. 2026. Palmitic Acid Promotes Antiviral Innate Immunity via ZDHHC20-Mediated CMPK2 Palmitoylation.. Adv Sci (Weinh) 13(37):e75209 PMID: 42011944
- 5. Morisseau L et al.. 2026. Identification of the differential and synergic lipotoxic patterns of oleic acid, palmitic acid, and their mixture in 3D HepG2/C3A tissue using liver-on-chip technology.. Biotechnol Prog 42(1):e70075 PMID: 41078319
- 6. van Rooijen MA et al.. 2020. Palmitic Acid Versus Stearic Acid: Effects of Interesterification and Intakes on Cardiometabolic Risk Markers - A Systematic Review.. Nutrients 12(3) PMID: 32111040
- 7. Ziqubu K et al.. 2025. Chronic exposure to palmitic acid-induced adipocyte hypertrophy and altered batokine gene expression in T37i brown adipocytes.. Toxicol In Vitro 108:106097 PMID: 40449640
- 8. Adrian L et al.. 2017. AMPK Prevents Palmitic Acid-Induced Apoptosis and Lipid Accumulation in Cardiomyocytes.. Lipids 52(9):737-750 PMID: 28825205
