GO:0015916 fatty-acyl-CoA transport: Lipid Metabolism Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0015916 fatty-acyl-CoA transport describes the directed movement of fatty acyl coenzyme A molecules into, out of, or within a cell, or between cells, via transporters or pores.
• Fatty acyl-CoA esters are central intermediates in lipid metabolism, serving as substrates for beta-oxidation, lipid synthesis, and protein acylation.
• Long-chain fatty acyl-CoA esters act as allosteric regulators of AMPK beta1 isoforms, linking lipid availability to cellular energy sensing.
• Disruption of fatty acyl-CoA transport or homeostasis can impair macrophage polarization and immune function, as shown by etomoxir-mediated inhibition.
• Nuclear translocation of ACSS2 and local acetyl-CoA production influence gene transcription for lysosomal biogenesis and autophagy, highlighting the role of acyl-CoA pools in gene regulation.
• Key proteins involved in fatty acyl-CoA transport include fatty acid transport proteins (FATPs), acyl-CoA synthetases, and carnitine palmitoyltransferases, which together facilitate uptake, activation, and intracellular distribution.
Description
Fatty acyl-coenzyme A (acyl-CoA) molecules are essential intermediates in cellular lipid metabolism, participating in energy production, membrane synthesis, and signaling. The directed movement of these molecules across cellular membranes and between subcellular compartments is critical for maintaining metabolic homeostasis and is classified under the Gene Ontology term GO:0015916, fatty-acyl-CoA transport. This process ensures that fatty acids, once activated to their CoA derivatives, reach the appropriate organelles for beta-oxidation, esterification, or regulatory functions. Researchers study fatty-acyl-CoA transport to understand how cells coordinate lipid uptake, storage, and utilization, and how defects in these pathways contribute to metabolic diseases, cancer, and immune dysfunction. The transport of fatty acyl-CoAs is not merely a passive diffusion but involves specific proteins that facilitate their movement across membranes, such as fatty acid transport proteins (FATPs) and carnitine palmitoyltransferases. Additionally, long-chain fatty acyl-CoA esters can act as signaling molecules, allosterically regulating enzymes like AMPK, thereby integrating lipid availability with energy status. This article provides a comprehensive overview of the ontology, mechanisms, key genes, and research methods related to fatty-acyl-CoA transport, based on authoritative QuickGO data and verified PubMed literature.
fatty-acyl-CoA transport At A Glance
| GO ID | GO:0015916 |
|---|---|
| GO term | fatty-acyl-CoA transport |
| Ontology | biological_process |
| Synonym | fatty acyl CoA transport, fatty acyl-CoA transport, fatty acyl coenzyme A transport |
| Major function | Mediates the directed movement of fatty acyl-CoA molecules across cellular membranes and between subcellular compartments, facilitating lipid metabolism and signaling. |
| Related cellular components | Mitochondrial membranes, peroxisomal membranes, endoplasmic reticulum, plasma membrane. |
| Key molecular players | Fatty acid transport proteins (FATPs), acyl-CoA synthetases, carnitine palmitoyltransferases, and possibly members of the ABCD family of transporters. |
| Associated biological processes | Fatty acid beta-oxidation, lipid biosynthesis, energy homeostasis, protein acylation. |
| Disease relevance | Metabolic disorders, cancer, immune dysfunction, and neurodegeneration. |
What Is GO:0015916?
According to the Gene Ontology, GO:0015916 fatty-acyl-CoA transport is defined as the directed movement of fatty acyl coenzyme A into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. Fatty acyl coenzyme A is an acyl group linked to 3'-phosphoadenosine-(5')diphospho(4')pantatheine (coenzyme A). In simpler terms, it is the process by which cells move activated fatty acids, attached to coenzyme A, across membranes or between compartments, often with the help of specific transport proteins.
Why Is fatty-acyl-CoA transport Important in Cell Biology?
Fatty-acyl-CoA transport is fundamental to cellular energy metabolism and lipid homeostasis. It ensures that activated fatty acids are delivered to mitochondria and peroxisomes for beta-oxidation, to the endoplasmic reticulum for lipid synthesis, and to the nucleus for regulatory processes. Dysregulation of this transport can lead to impaired energy production, accumulation of toxic lipid intermediates, and altered signaling pathways, contributing to diseases such as obesity, diabetes, cancer, and immune disorders. Understanding the mechanisms of fatty-acyl-CoA transport is therefore crucial for developing therapeutic strategies targeting metabolic pathways.
• Enables fatty acid oxidation by transporting acyl-CoAs into mitochondria and peroxisomes.
• Supports lipid synthesis by delivering acyl-CoAs to the endoplasmic reticulum and other organelles.
• Regulates energy homeostasis through allosteric control of AMPK by long-chain acyl-CoAs.
• Modulates immune cell function, as shown by etomoxir inhibition of macrophage polarization.
• Influences gene expression via nuclear acyl-CoA pools and histone acetylation.
• Contributes to protein acylation by providing substrates for zDHHC acyltransferases.
• Implicated in cancer metabolism and tumor immunity through lysine catabolism and crotonylation.
• Potential target for treating metabolic diseases like diabetes and fatty liver disease.
• Plays a role in neurodegeneration through altered lipid metabolism.
• Essential for understanding drug resistance and metabolic reprogramming in cancer.
What Happens During fatty-acyl-CoA transport?
Fatty Acid Activation to Acyl-CoA
In simple terms: Fatty acids must be activated by attaching coenzyme A before they can be transported.
The first step in fatty-acyl-CoA transport is the activation of fatty acids to their CoA derivatives, catalyzed by acyl-CoA synthetases. This reaction consumes ATP and produces fatty acyl-CoA, which is the substrate for subsequent transport processes. Different acyl-CoA synthetases exhibit specificity for fatty acids of varying chain lengths, ensuring proper handling of short-, medium-, and long-chain fatty acids.
Transport Across the Plasma Membrane
In simple terms: Fatty acyl-CoAs or their precursors are moved into the cell across the plasma membrane.
Fatty acid transport proteins (FATPs) are integral membrane proteins that facilitate the uptake of long-chain fatty acids into cells. Although FATPs are primarily known for fatty acid transport, they may also play a role in the transport of fatty acyl-CoAs or their precursors. The exact mechanism of acyl-CoA transport across the plasma membrane remains an area of active research, with evidence suggesting involvement of specific transporters or pores.
Intracellular Trafficking to Organelles
In simple terms: Inside the cell, fatty acyl-CoAs are directed to different organelles for various metabolic fates.
Once inside the cell, fatty acyl-CoAs are distributed to mitochondria, peroxisomes, and the endoplasmic reticulum. The carnitine palmitoyltransferase system transports long-chain acyl-CoAs into mitochondria for beta-oxidation. Peroxisomes also import acyl-CoAs for oxidation of very-long-chain fatty acids. The endoplasmic reticulum utilizes acyl-CoAs for lipid synthesis, while the nucleus may receive acyl-CoAs for regulatory purposes.
Regulation by Acyl-CoA Binding Proteins
In simple terms: Special proteins bind fatty acyl-CoAs to keep them soluble and guide their transport.
Acyl-CoA binding proteins (ACBPs) are small, abundant proteins that bind medium- and long-chain acyl-CoAs with high affinity, maintaining a soluble pool and protecting against membrane perturbation. They facilitate the intracellular transport and delivery of acyl-CoAs to specific enzymes and organelles. The interplay between ACBPs and transport proteins ensures efficient channeling of acyl-CoAs to metabolic pathways.
Signaling and Regulatory Roles of Acyl-CoAs
In simple terms: Fatty acyl-CoAs can act as signals to regulate cellular processes.
Beyond their metabolic roles, long-chain fatty acyl-CoA esters serve as allosteric regulators of enzymes such as AMPK. They bind to AMPK beta1 isoforms and modulate its activity, linking lipid availability to energy sensing. Additionally, acyl-CoAs can influence gene transcription by serving as substrates for histone acyltransferases, as seen with ACSS2-dependent nuclear acetyl-CoA production for lysosomal biogenesis and autophagy. These signaling functions underscore the importance of precise acyl-CoA transport and compartmentalization.
Key Genes Involved in GO:0015916 fatty-acyl-CoA transport
The following genes and proteins are key players in fatty-acyl-CoA transport and related metabolic processes.
| Gene | Major Role | Research Relevance |
|---|---|---|
| SLC27A1 (FATP1) | Fatty acid transport protein 1; facilitates uptake of long-chain fatty acids | Studied for roles in insulin resistance and lipid accumulation |
| SLC27A2 (FATP2) | Fatty acid transport protein 2; involved in peroxisomal and ER fatty acid transport | Target for metabolic disorders and cancer |
| SLC27A4 (FATP4) | Fatty acid transport protein 4; major FATP in enterocytes | Linked to intestinal lipid absorption and obesity |
| ACSL1 | Acyl-CoA synthetase long-chain family member 1; activates long-chain fatty acids | Key enzyme in fatty acid activation for beta-oxidation |
| ACSL3 | Acyl-CoA synthetase long-chain family member 3 | Implicated in lipid droplet formation and cancer |
| ACSL4 | Acyl-CoA synthetase long-chain family member 4 | Involved in ferroptosis and lipid metabolism |
| ACSS2 | Acyl-CoA synthetase short-chain family member 2; produces acetyl-CoA | Nuclear role in gene regulation and autophagy |
| CPT1A | Carnitine palmitoyltransferase 1A; rate-limiting for mitochondrial fatty acid oxidation | Target for diabetes and obesity |
| CPT2 | Carnitine palmitoyltransferase 2; inner mitochondrial membrane enzyme | Defects cause CPT II deficiency |
| SLC25A20 (CACT) | Carnitine-acylcarnitine translocase; transports acylcarnitines across inner mitochondrial membrane | Mutations cause carnitine-acylcarnitine translocase deficiency |
| ACBD3 | Acyl-CoA binding domain containing 3 | Golgi-associated protein with roles in lipid metabolism |
| DBI (ACBP) | Diazepam binding inhibitor; acyl-CoA binding protein | Regulates acyl-CoA pool and lipid signaling |
| ABCD1 | ATP-binding cassette subfamily D member 1; peroxisomal transporter | Defects cause X-linked adrenoleukodystrophy |
| ABCD2 | ATP-binding cassette subfamily D member 2 | Related to peroxisomal fatty acid transport |
| ABCD3 | ATP-binding cassette subfamily D member 3 | Peroxisomal membrane protein involved in fatty acid transport |
| ZDHHC proteins | zDHHC protein acyltransferases; use long-chain acyl-CoAs for protein acylation | Studied for roles in protein palmitoylation and signaling |
| AMPK (PRKAA1/2, PRKAB1/2) | Energy sensor; allosterically regulated by long-chain acyl-CoAs | Central to metabolic regulation |
| HAT1 | Histone acetyltransferase; may utilize acyl-CoAs for histone modification | Linked to chromatin regulation and metabolism |
How Is fatty-acyl-CoA transport Regulated?
Fatty-acyl-CoA transport is regulated at multiple levels to meet cellular metabolic demands. The expression and activity of fatty acid transport proteins (FATPs) and acyl-CoA synthetases are controlled by transcription factors such as PPARs and SREBP-1c, which respond to nutritional and hormonal signals. Post-translational modifications, including phosphorylation and ubiquitination, modulate the activity and localization of these proteins. Additionally, the availability of acyl-CoA binding proteins (ACBPs) influences the intracellular pool of free acyl-CoAs and their trafficking. Long-chain acyl-CoAs themselves act as allosteric regulators of AMPK, providing feedback regulation of energy metabolism. Furthermore, the nuclear translocation of ACSS2 and subsequent acetyl-CoA production for histone acetylation represents a regulatory link between acyl-CoA metabolism and gene expression.
fatty-acyl-CoA transport and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| SLC27A1 (FATP1) | Insulin resistance, obesity | Knockout mouse, overexpression in adipocytes |
| CPT1A | Diabetes, fatty acid oxidation disorders | Point mutation knock-in, liver-specific KO |
| ACSS2 | Cancer, neurodegeneration | Knockout in cancer cell lines, neuronal models |
| ABCD1 | X-linked adrenoleukodystrophy | Patient-derived fibroblasts, ABCD1 KO mice |
| ACSL4 | Ferroptosis, cancer | CRISPR KO in cancer cells, lipid peroxidation assays |
Metabolic Disorders
Dysregulation of fatty-acyl-CoA transport is implicated in metabolic disorders such as obesity, type 2 diabetes, and non-alcoholic fatty liver disease. Impaired mitochondrial fatty acid oxidation due to defects in carnitine palmitoyltransferase or translocase can lead to accumulation of toxic acyl-CoAs and energy deficiency. Polymorphisms in FATP genes have been associated with insulin resistance and dyslipidemia. Targeting these transport pathways is a potential therapeutic strategy for improving metabolic health.
Cancer
Cancer cells often reprogram lipid metabolism to support rapid proliferation. Upregulation of fatty acid transport proteins and acyl-CoA synthetases has been observed in various cancers, contributing to increased fatty acid uptake and beta-oxidation. ACSS2-mediated acetyl-CoA production supports histone acetylation and gene expression for tumor growth. Additionally, lysine catabolism and histone crotonylation, which depend on acyl-CoA pools, can reprogram tumor immunity. Inhibiting fatty-acyl-CoA transport may therefore have anti-cancer effects.
Immune Dysfunction
Fatty acid oxidation is critical for macrophage polarization and function. Etomoxir, an inhibitor of carnitine palmitoyltransferase 1, disrupts CoA homeostasis and impairs macrophage polarization, highlighting the importance of acyl-CoA transport in immunity. Dysregulated lipid metabolism in immune cells can contribute to chronic inflammation and autoimmune diseases.
Neurodegeneration
Defects in peroxisomal fatty acid transport, such as those caused by ABCD1 mutations, lead to X-linked adrenoleukodystrophy, a neurodegenerative disorder characterized by accumulation of very-long-chain fatty acids. Additionally, ACSS2 and acetyl-CoA metabolism have been linked to lysosomal biogenesis and autophagy in neurons, suggesting a role in neurodegenerative diseases like Alzheimer's and Parkinson's.
From fatty-acyl-CoA transport-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X regulate fatty acyl-CoA transport? | CRISPR knockout of gene X in cell lines, followed by acyl-CoA profiling |
| What is the effect of a specific point mutation in a transporter? | Point mutation knock-in using CRISPR in isogenic cell lines |
| Can a tagged transporter be used to visualize localization? | Knock-in of fluorescent tag (e.g., GFP) at endogenous locus |
| Does overexpression of a transporter increase fatty acid uptake? | Overexpression via lentiviral transduction or CRISPR activation |
| Which genes are essential for fatty acyl-CoA transport? | Genome-wide CRISPR library screening with acyl-CoA transport readout |
| How does a disease-associated mutation affect transport activity? | Knock-in of patient mutation in model cell lines, functional assays |
How to Study the fatty-acyl-CoA transport Process
| Method | What It Measures | Typical Application |
|---|---|---|
| LC-MS/MS acyl-CoA profiling | Quantities of individual acyl-CoA species | Assessing metabolic changes after gene knockout |
| Radioactive fatty acid uptake | Rate of fatty acid transport into cells | Evaluating transporter function and inhibitors |
| Fluorescent fatty acid uptake | Cellular uptake of fluorescent fatty acid analogs | High-throughput screening and live-cell imaging |
| CRISPR knockout library screen | Genes essential for fatty acyl-CoA transport | Discovery of novel transporters |
| Subcellular fractionation | Distribution of acyl-CoAs and proteins | Determining organelle-specific transport |
| Immunofluorescence microscopy | Localization of transport proteins | Visualizing protein trafficking |
| Acyl-CoA binding assays | Binding affinity of proteins to acyl-CoAs | Characterizing ACBP function |
| Seahorse extracellular flux analysis | Mitochondrial fatty acid oxidation | Functional assessment of transport |
Acyl-CoA Profiling by Mass Spectrometry
Liquid chromatography-tandem mass spectrometry (LC-MS/MS) allows quantification of individual acyl-CoA species in cells and tissues. This method is essential for assessing the impact of genetic perturbations on fatty acyl-CoA levels and transport. It can detect changes in chain length and saturation, providing insights into metabolic flux.
Radioactive and Fluorescent Fatty Acid Uptake Assays
Cellular uptake of radiolabeled or fluorescently labeled fatty acids can be measured to assess transport activity. These assays are used to evaluate the function of fatty acid transport proteins and the effect of inhibitors or genetic modifications. They provide a direct readout of transport capacity.
Genetic Screens and CRISPR Libraries
Genome-wide CRISPR knockout or activation screens can identify genes that regulate fatty acyl-CoA transport. By coupling transport readouts (e.g., fluorescent fatty acid uptake) with next-generation sequencing, researchers can discover novel transporters and regulatory factors. This approach is powerful for unbiased discovery.
Subcellular Fractionation and Imaging
Subcellular fractionation followed by immunoblotting or mass spectrometry can determine the distribution of acyl-CoAs and transport proteins among organelles. Fluorescence microscopy with tagged proteins or acyl-CoA sensors enables visualization of transport dynamics in live cells. These methods reveal spatial organization of the transport process.
How CRISPR Can Be Used to Study GO:0015916 fatty-acyl-CoA transport
Knockout
CRISPR knockout of genes involved in fatty-acyl-CoA transport, such as SLC27A1 or CPT1A, can be used to study their essential roles in lipid metabolism. Knockout cell lines and animal models help determine the contribution of specific transporters to fatty acid uptake and oxidation. These models are valuable for validating drug targets and understanding disease mechanisms.
Point Mutation
Introducing disease-associated point mutations into genes like CPT1A or ABCD1 using CRISPR base editing or homology-directed repair allows researchers to study the functional consequences of specific variants. Such models can reveal how mutations affect transport activity, substrate specificity, or protein stability.
Knock-in
Knock-in of tags (e.g., GFP, HA) or reporter genes at endogenous loci enables real-time visualization and quantification of transport proteins. This approach is useful for tracking protein localization, dynamics, and interactions under physiological conditions. Knock-in models also facilitate the study of regulatory elements.
Overexpression
CRISPR activation (CRISPRa) or lentiviral overexpression can be used to increase the expression of fatty acid transport proteins or acyl-CoA synthetases. Overexpression models help determine whether increased transport activity is sufficient to drive metabolic reprogramming or disease phenotypes. They are also useful for biochemical studies requiring large amounts of protein.
How EDITGENE Supports fatty-acyl-CoA transport Research
Researchers studying fatty-acyl-CoA transport-related genes often need to determine whether a candidate gene is causally involved in lipid metabolism, transport, or disease. EDITGENE provides comprehensive CRISPR-based services to create precise cellular and animal models, enabling functional validation and mechanistic studies.
Contact EDITGENE today to design your custom CRISPR model for fatty-acyl-CoA transport research.
Frequently Asked Questions About fatty-acyl-CoA transport
What is fatty-acyl-CoA transport?
Fatty-acyl-CoA transport is the directed movement of fatty acyl coenzyme A molecules into, out of, or within a cell, or between cells, facilitated by transporters or pores.
What genes are involved in fatty-acyl-CoA transport?
Key genes include SLC27A1 (FATP1), SLC27A2 (FATP2), ACSL1, CPT1A, CPT2, SLC25A20 (CACT), and ACSS2, among others.
What is the GO ID for fatty-acyl-CoA transport?
The Gene Ontology ID for fatty-acyl-CoA transport is GO:0015916.
Why is fatty-acyl-CoA transport important?
It is essential for fatty acid oxidation, lipid synthesis, energy homeostasis, and signaling, and its dysregulation contributes to metabolic diseases, cancer, and immune dysfunction.
How is fatty-acyl-CoA transport regulated?
It is regulated by transcription factors like PPARs and SREBP-1c, post-translational modifications, acyl-CoA binding proteins, and allosteric regulation of AMPK by long-chain acyl-CoAs.
What diseases are associated with defects in fatty-acyl-CoA transport?
Diseases include obesity, type 2 diabetes, non-alcoholic fatty liver disease, X-linked adrenoleukodystrophy, and certain cancers.
What methods are used to study fatty-acyl-CoA transport?
Common methods include LC-MS/MS acyl-CoA profiling, radioactive and fluorescent fatty acid uptake assays, CRISPR screens, and subcellular fractionation.
Can CRISPR be used to study fatty-acyl-CoA transport?
Yes, CRISPR knockout, point mutation knock-in, tagged knock-in, and overexpression models are widely used to study gene function in fatty-acyl-CoA transport.
What is the role of ACSS2 in fatty-acyl-CoA transport?
ACSS2 produces acetyl-CoA, which can be used for histone acetylation and gene regulation, linking acyl-CoA metabolism to transcription.
How does etomoxir affect fatty-acyl-CoA transport?
Etomoxir inhibits carnitine palmitoyltransferase 1, disrupting CoA homeostasis and impairing macrophage polarization, demonstrating the importance of acyl-CoA transport in immunity.
Conclusion
Fatty-acyl-CoA transport (GO:0015916) is a fundamental biological process that ensures the proper distribution of activated fatty acids for energy production, lipid synthesis, and signaling. Its dysregulation is linked to a wide range of diseases, including metabolic disorders, cancer, and immune dysfunction. Understanding the molecular mechanisms and key genes involved provides opportunities for therapeutic intervention. EDITGENE offers comprehensive CRISPR services to facilitate functional studies of fatty-acyl-CoA transport genes, from knockout and point mutation models to library screening and bioinformatics support.
References
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