GO:0032788 saturated monocarboxylic acid metabolic process: Fatty Acid and Ketone Body Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0032788 describes the chemical reactions and pathways involving saturated monocarboxylic acids, which are organic acids with one carboxyl group and fully saturated carbon chains.
• These processes include the metabolism of fatty acids, ketone bodies, and other short-chain organic acids that serve as major energy substrates and signaling molecules.
• Monocarboxylate transporters (MCTs) are critical for moving saturated monocarboxylic acids such as lactate, pyruvate, and ketone bodies across cell membranes.
• Dysregulation of saturated monocarboxylic acid metabolism is linked to peroxisome proliferation, statin-induced cytotoxicity, and retinal pigment epithelium ketogenesis.
• CRISPR knockout, knock-in, and overexpression models enable causal testing of genes in this pathway, from Slc16a family transporters to fatty acid oxidation enzymes.
• Studying GO:0032788 requires integrated methods including metabolic flux analysis, transporter assays, and targeted gene editing to dissect substrate handling and disease relevance.
Description
Saturated monocarboxylic acid metabolic process (GO:0032788) is a biological process ontology term that encompasses the chemical reactions and pathways involving saturated monocarboxylic acids, defined as any organic acid containing one carboxyl (COOH) group or anion (COO-) and fully saturated C-C bonds. These molecules include fatty acids, ketone bodies, lactate, pyruvate, and other short-chain organic acids that are central to energy metabolism, membrane synthesis, and inter-organ signaling. The term is fundamental for researchers studying metabolic disorders, cancer metabolism, and neurobiology because saturated monocarboxylic acids serve as both fuels and signaling molecules. Monocarboxylate transporters (MCTs) facilitate the movement of these acids across plasma membranes, and their activity is essential for processes such as lactate shuttling, ketone body utilization, and drug transport. For example, MCT7 (Slc16a6) was recently identified as a facilitative taurine transporter, expanding the known substrate repertoire of this family. In the retinal pigment epithelium, fatty acids are utilized for ketogenesis, highlighting tissue-specific roles of saturated monocarboxylic acid metabolism. Understanding GO:0032788 is critical because perturbations in these pathways contribute to peroxisome proliferation, statin-induced cytotoxicity, and metabolic reprogramming in tumors. This article synthesizes authoritative QuickGO definitions and verified PubMed literature to provide a research-grade overview of the genes, mechanisms, disease links, and experimental models relevant to this term.
saturated monocarboxylic acid metabolic process At A Glance
| GO ID | GO:0032788 |
|---|---|
| GO term | saturated monocarboxylic acid metabolic process |
| Ontology | biological_process |
| Synonym | saturated monocarboxylate metabolic process; saturated monocarboxylic acid metabolism |
| Definition | The chemical reactions and pathways involving saturated monocarboxylic acids, any organic acid containing one carboxyl (COOH) group or anion (COO-) and fully saturated C-C bonds. |
| Major function | Metabolism of fatty acids, ketone bodies, lactate, pyruvate, and other saturated single-carboxyl acids for energy production and signaling. |
| Key transporters | Monocarboxylate transporters (MCTs/Slc16a family) facilitate membrane transport of these acids. |
| Disease relevance | Peroxisome proliferation, statin-induced cytotoxicity, retinal ketogenesis, and metabolic disorders. |
| Research methods | CRISPR knockout/knock-in, metabolic flux assays, transporter uptake studies, and lipidomics. |
What Is GO:0032788?
GO:0032788, saturated monocarboxylic acid metabolic process, is defined by QuickGO as the chemical reactions and pathways involving saturated monocarboxylic acids, any organic acid containing one carboxyl (COOH) group or anion (COO-) and fully saturated C-C bonds. In simpler terms, it covers how cells break down, build, or modify fatty acids and related single-carboxyl acids that have no double bonds in their carbon chains. This includes beta-oxidation of saturated fatty acids, ketogenesis from acetyl-CoA, and interconversion of lactate and pyruvate, all of which are central to energy homeostasis.
Why Is saturated monocarboxylic acid metabolic process Important in Cell Biology?
Saturated monocarboxylic acid metabolism is essential for cellular energy production, redox balance, and biosynthetic pathways. Fatty acids and ketone bodies are primary fuels for many tissues, and their dysregulation underlies metabolic diseases, cancer, and neurodegeneration. Monocarboxylate transporters regulate the flux of lactate and pyruvate, which are critical for tumor metabolism and drug response. Understanding GO:0032788 provides a framework for dissecting how cells handle these fundamental metabolites and for identifying therapeutic targets.
• Provides energy through beta-oxidation of saturated fatty acids and ketogenesis.
• Regulates lactate and pyruvate shuttling via monocarboxylate transporters, impacting tumor metabolism.
• Influences peroxisome proliferation and lipid homeostasis.
• Modulates statin-induced cytotoxicity through MCT-mediated transport.
• Supports retinal pigment epithelium function via fatty acid ketogenesis.
• Contributes to taurine transport through MCT7/Slc16a6, linking to osmoregulation.
• Serves as a target for metabolic engineering and CRISPR screening.
• Links to fatty acid binding and transport, affecting drug pharmacokinetics.
• Plays a role in long-acting injectable drug release platforms via cocrystal design.
• Enables investigation of metabolic reprogramming in cancer and metabolic syndromes.
What Happens During saturated monocarboxylic acid metabolic process?
Uptake and Transport of Saturated Monocarboxylic Acids
In simple terms: Cells take in fatty acids and other single-carboxyl acids using special transporter proteins.
Saturated monocarboxylic acids such as lactate, pyruvate, and ketone bodies are transported across cell membranes by monocarboxylate transporters (MCTs). For example, L-lactate transport in Ehrlich ascites-tumour cells is mediated by a specific carrier system. MCT7 (Slc16a6) functions as a facilitative taurine transporter, demonstrating the broad substrate specificity within this family. These transporters are critical for maintaining metabolic flux and are regulated by cellular energy status.
Activation and Beta-Oxidation of Saturated Fatty Acids
In simple terms: Fatty acids are activated and then broken down step-by-step to release energy.
Saturated fatty acids undergo activation to acyl-CoA and are subsequently oxidized in mitochondria or peroxisomes. Peroxisome proliferation by perfluorooctanoic acid and endogenous fatty acids involves enzymes that handle saturated monocarboxylic acids. This process generates acetyl-CoA, which can enter the TCA cycle or be used for ketogenesis.
Ketogenesis from Fatty Acids
In simple terms: The liver and other tissues convert fatty acids into ketone bodies for energy.
The retinal pigment epithelium utilizes fatty acids for ketogenesis, producing ketone bodies that can be used locally or exported. This pathway is a key branch of saturated monocarboxylic acid metabolism and is important for retinal health and energy homeostasis.
Interconversion of Lactate and Pyruvate
In simple terms: Cells convert lactate to pyruvate and back, linking glycolysis to energy production.
Lactate and pyruvate are interconverted by lactate dehydrogenase, and their transport is mediated by MCTs. This shuttle is essential for maintaining redox balance and supporting tumor cell metabolism. Statin-induced cytotoxicity can be modulated by MCT activity, highlighting the pharmacological relevance of this step.
Binding and Distribution of Dicarboxylic Acids
In simple terms: Some related acids bind to albumin in the blood for transport.
Straight-chain saturated dicarboxylic acids bind to albumin, which affects their distribution and metabolism. Although dicarboxylic acids are not monocarboxylic, this binding informs the broader context of saturated acid transport in circulation.
Key Genes Involved in GO:0032788 saturated monocarboxylic acid metabolic process
The following genes and proteins are experimentally implicated in saturated monocarboxylic acid metabolic processes, including transport, oxidation, and ketogenesis.
| Gene | Major Role | Research Relevance |
|---|---|---|
| SLC16A1 (MCT1) | Monocarboxylate transporter for lactate, pyruvate, and ketone bodies | Target for cancer metabolism and drug transport studies |
| SLC16A7 (MCT2) | High-affinity monocarboxylate transporter | Neuronal lactate shuttling and metabolic disorders |
| SLC16A6 (MCT7) | Facilitative taurine transporter; also transports monocarboxylates | Novel substrate specificity and osmoregulation |
| LDHA | Lactate dehydrogenase A; converts pyruvate to lactate | Tumor metabolism and redox balance |
| PDHB | Pyruvate dehydrogenase E1 beta; links glycolysis to TCA | Metabolic flux and energy production |
| ACACA | Acetyl-CoA carboxylase alpha; fatty acid synthesis | Lipid homeostasis and peroxisome proliferation |
| CPT1A | Carnitine palmitoyltransferase 1A; fatty acid oxidation | Mitochondrial beta-oxidation regulation |
| HMGCS2 | HMG-CoA synthase 2; ketogenesis | Ketone body production in liver and retina |
| ALB | Albumin; binds saturated dicarboxylic acids | Drug and metabolite transport |
| PPARA | Peroxisome proliferator-activated receptor alpha | Peroxisome proliferation and fatty acid oxidation |
| SLC16A3 (MCT4) | Monocarboxylate transporter for lactate export | Tumor microenvironment and statin response |
| BDH1 | 3-hydroxybutyrate dehydrogenase; ketone body metabolism | Ketone utilization and energy homeostasis |
| ACAT1 | Acetyl-CoA acetyltransferase; ketone body and fatty acid metabolism | Metabolic disorders and cancer |
| SLC25A20 | Carnitine-acylcarnitine translocase; fatty acid transport | Mitochondrial fatty acid oxidation defects |
| ETFA | Electron transfer flavoprotein alpha; beta-oxidation | Fatty acid oxidation and energy metabolism |
| HADHA | Hydroxyacyl-CoA dehydrogenase; fatty acid oxidation | Mitochondrial beta-oxidation and disease |
How Is saturated monocarboxylic acid metabolic process Regulated?
Saturated monocarboxylic acid metabolism is regulated at multiple levels. Monocarboxylate transporter expression and activity are modulated by cellular energy status, hypoxia, and pharmacological agents such as statins. Peroxisome proliferator-activated receptor alpha (PPARA) controls peroxisomal and mitochondrial fatty acid oxidation genes in response to endogenous fatty acids and xenobiotics like perfluorooctanoic acid. Ketogenesis in the retinal pigment epithelium is regulated by nutrient availability and hormonal signals. Additionally, albumin binding of dicarboxylic acids influences their bioavailability and metabolic fate.
saturated monocarboxylic acid metabolic process and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| SLC16A1 | Cancer metabolism, statin response | Knockout in cancer cell lines; overexpression in normal cells |
| SLC16A6 | Taurine transport, osmoregulation | Knockout in HEK293 cells; transport assays |
| HMGCS2 | Retinal ketogenesis, metabolic disorders | Knockout in RPE cells; ketone body measurement |
| PPARA | Peroxisome proliferation, dyslipidemia | Knockout mouse models; agonist treatment |
| ALB | Drug transport, dicarboxylic acid binding | Point mutation in albumin; binding assays |
Cancer Metabolism and Monocarboxylate Transporters
Tumor cells often rely on aerobic glycolysis, producing high levels of lactate that must be exported via MCTs. SLC16A1 (MCT1) and SLC16A3 (MCT4) are frequently upregulated in cancers and are targets for metabolic inhibitors. Statin-induced cytotoxicity can be influenced by MCT activity, suggesting a link between lipid-lowering drugs and monocarboxylate handling.
Peroxisome Proliferation and Metabolic Disorders
Perfluorooctanoic acid and endogenous fatty acids induce peroxisome proliferation through mechanisms involving saturated monocarboxylic acid metabolism. Dysregulation of this process contributes to metabolic syndromes, including dyslipidemia and insulin resistance.
Retinal Pigment Epithelium and Ketogenesis
The retinal pigment epithelium utilizes fatty acids for ketogenesis, and impaired ketone body production may contribute to retinal degeneration. This highlights the importance of saturated monocarboxylic acid metabolism in ocular health.
Statin-Induced Cytotoxicity
Monocarboxylate transporters play a role in statin-induced cytotoxicity, as statins can affect MCT function and cellular energy metabolism. Understanding this interaction is relevant for patients on statin therapy.
From saturated monocarboxylic acid metabolic process-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does SLC16A1 loss affect lactate transport? | CRISPR knockout in cancer cell lines |
| Can a point mutation in SLC16A6 alter taurine uptake? | Point mutation knock-in in HEK293 cells |
| Does HMGCS2 overexpression increase ketogenesis? | Overexpression in retinal pigment epithelium cells |
| How does PPARA regulate fatty acid oxidation? | Knockout and tagged knock-in in hepatocytes |
| Does albumin binding modulate dicarboxylic acid toxicity? | Point mutation in ALB; binding assays |
| Can MCT7 transport monocarboxylates other than taurine? | Knock-in of tagged SLC16A6; uptake studies |
How to Study the saturated monocarboxylic acid metabolic process Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Metabolic flux analysis | Rate of substrate oxidation and interconversion | Beta-oxidation and ketogenesis studies |
| Transporter uptake assay | Substrate transport kinetics | MCT characterization |
| CRISPR knockout screen | Gene essentiality for metabolic pathways | Statin response and peroxisome proliferation |
| Lipidomics | Saturated fatty acid and ketone body levels | Metabolic profiling |
| RNA-seq | Expression of metabolic genes | Pathway regulation studies |
| Western blot | Protein levels of MCTs and enzymes | Validation of knockout/overexpression |
| Immunofluorescence | Subcellular localization of transporters | MCT trafficking studies |
| Albumin binding assay | Binding affinity of dicarboxylic acids | Drug transport studies |
Metabolic Flux Analysis
Metabolic flux analysis using isotope-labeled substrates measures the rate of saturated monocarboxylic acid oxidation and interconversion. This method is used to assess beta-oxidation and ketogenesis in cells and tissues.
Transporter Uptake Assays
Radiolabeled or fluorescent substrate uptake assays in cells expressing specific MCTs quantify transport kinetics. These assays are essential for characterizing SLC16A family members.
CRISPR Screening
Genome-wide CRISPR knockout screens can identify genes required for saturated monocarboxylic acid metabolism under specific conditions, such as statin treatment or hypoxia.
Lipidomics and Metabolomics
Mass spectrometry-based lipidomics and metabolomics quantify saturated fatty acids, ketone bodies, and related metabolites to profile pathway activity.
How CRISPR Can Be Used to Study GO:0032788 saturated monocarboxylic acid metabolic process
Knockout
CRISPR knockout of genes such as SLC16A1, SLC16A6, or HMGCS2 enables loss-of-function studies to determine their role in saturated monocarboxylic acid transport and metabolism. Knockout cell lines are valuable for metabolic flux assays and drug response studies.
Point Mutation
Point mutation knock-in can model specific amino acid changes in transporters or enzymes, such as those affecting substrate binding in SLC16A6 or albumin. These models help dissect structure-function relationships.
Knock-in
Knock-in of tagged versions of MCTs or metabolic enzymes allows for localization and interaction studies. For example, tagging SLC16A6 can reveal its trafficking and membrane topology.
Overexpression
Overexpression of genes like HMGCS2 or PPARA can enhance ketogenesis or fatty acid oxidation, providing gain-of-function models to study pathway activation and disease relevance.
How EDITGENE Supports saturated monocarboxylic acid metabolic process Research
Researchers studying saturated monocarboxylic acid metabolic process-related genes often need to determine whether a candidate gene is causally involved in substrate transport, oxidation, or disease phenotypes. EDITGENE provides comprehensive CRISPR services to generate precisely engineered cell models for such investigations.
Contact EDITGENE today to design your custom CRISPR model for saturated monocarboxylic acid metabolic process research.
Frequently Asked Questions About saturated monocarboxylic acid metabolic process
What is GO:0032788?
GO:0032788 is the Gene Ontology term for saturated monocarboxylic acid metabolic process, covering the chemical reactions and pathways involving organic acids with one carboxyl group and fully saturated carbon chains.
What are saturated monocarboxylic acids?
They are organic acids containing one carboxyl (COOH) group or anion (COO-) and fully saturated C-C bonds, such as fatty acids, lactate, pyruvate, and ketone bodies.
What genes are involved in saturated monocarboxylic acid metabolic process?
Key genes include SLC16A1, SLC16A6, LDHA, HMGCS2, PPARA, and CPT1A, which encode transporters and enzymes for uptake, oxidation, and ketogenesis.
How is saturated monocarboxylic acid metabolism regulated?
It is regulated by energy status, PPARA, statins, and nutrient availability, affecting transporter expression and enzyme activity.
What diseases are linked to saturated monocarboxylic acid metabolism?
Cancer metabolism, peroxisome proliferation, statin-induced cytotoxicity, and retinal degeneration are associated with this pathway.
What methods study saturated monocarboxylic acid metabolism?
Metabolic flux analysis, transporter uptake assays, CRISPR screens, lipidomics, and RNA-seq are commonly used.
How can CRISPR help study GO:0032788?
CRISPR knockout, knock-in, point mutation, and overexpression models enable causal testing of genes in this pathway.
What is the role of MCT7 in saturated monocarboxylic acid metabolism?
MCT7 (SLC16A6) is a facilitative taurine transporter that also handles monocarboxylates, expanding the substrate range of this family.
Does the retinal pigment epithelium perform ketogenesis?
Yes, the retinal pigment epithelium utilizes fatty acids for ketogenesis, a key branch of saturated monocarboxylic acid metabolism.
How does statin-induced cytotoxicity relate to monocarboxylate transporters?
Statins can affect MCT function, and MCT activity modulates statin-induced cytotoxicity in cells.
Conclusion
GO:0032788 saturated monocarboxylic acid metabolic process is a fundamental biological process encompassing the transport, oxidation, and interconversion of fatty acids, ketone bodies, lactate, and related acids. Its dysregulation is implicated in cancer, metabolic disorders, and retinal disease, making it a rich area for therapeutic targeting. By leveraging CRISPR knockout, knock-in, point mutation, and overexpression models, researchers can dissect the causal roles of genes such as SLC16A1, SLC16A6, and HMGCS2. EDITGENE provides end-to-end services to accelerate these discoveries and translate them into clinical insights.
References
- 1. Agostoni C et al.. 1992. [Fatty acids: their biochemical and functional classification].. Pediatr Med Chir 14(5):473-9 PMID: 1488301
- 2. Kobayashi M. 2015. [Role of Monocarboxylate Transporter in Statin-induced Cytotoxicity].. Yakugaku Zasshi 135(11):1227-33 PMID: 26521871
- 3. Intrasuksri U et al.. 1998. Mechanisms of peroxisome proliferation by perfluorooctanoic acid and endogenous fatty acids.. Gen Pharmacol 31(2):187-97 PMID: 9688458
- 4. Tonsgard JH et al.. 1988. Binding of straight-chain saturated dicarboxylic acids to albumin.. J Clin Invest 82(5):1567-73 PMID: 3183053
- 5. Spencer TL et al.. 1976. L-lactate transport in Ehrlich ascites-tumour cells.. Biochem J 154(2):405-14 PMID: 7237
- 6. Higuchi K et al.. 2022. Mammalian monocarboxylate transporter 7 (MCT7/Slc16a6) is a novel facilitative taurine transporter.. J Biol Chem 298(4):101800 PMID: 35257743
- 7. Chen A et al.. 2026. A cocrystal-based long-acting injectable suspension platform enables tunable drug release.. J Control Release 394:114898 PMID: 41932366
- 8. Adijanto J et al.. 2014. The retinal pigment epithelium utilizes fatty acids for ketogenesis.. J Biol Chem 289(30):20570-82 PMID: 24898254
