GO:0009258 10-formyltetrahydrofolate catabolic process: Folate Metabolism Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0009258 describes the breakdown of 10-formyltetrahydrofolate (10-formyl-THF), the formylated derivative of tetrahydrofolate.
• The process is central to one-carbon metabolism and controls the availability of 10-formyl-THF for purine biosynthesis and formate generation.
• ALDH1L1 (cytosolic) and ALDH1L2 (mitochondrial) are the main enzymes that catalyze the NADP+-dependent oxidation of 10-formyl-THF to CO2 and THF.
• Loss of ALDH1L1/ALDH1L2 alters formate, formyl-methionine, and reactive oxygen species (ROS) levels, affecting cancer cell migration and metastasis.
• The catabolic process is chemically linked to 10-formyldihydrofolate formation and mitochondrial complex IV activity, expanding its metabolic reach.
• CRISPR knockout, point-mutation, knock-in, and overexpression models are essential to dissect how this pathway contributes to disease and cell metabolism.
Description
10-formyltetrahydrofolate catabolic process (GO:0009258) is the set of chemical reactions that degrade 10-formyltetrahydrofolate, a formylated derivative of tetrahydrofolate that serves as a key one-carbon donor in folate metabolism. This process is not merely a disposal route; it determines the cellular balance between folate-dependent biosynthesis and the release of formate, a one-carbon unit that can be used for nucleotide synthesis or become toxic when it accumulates. Because 10-formyl-THF sits at the intersection of purine biosynthesis, methionine cycle, and mitochondrial one-carbon flux, its catabolism influences cell proliferation, redox homeostasis, and epigenetic methylation potential. Researchers study GO:0009258 to understand how cells regulate one-carbon availability and how dysregulation contributes to cancer, metabolic disorders, and developmental defects. The enzymatic players, especially ALDH1L1 and ALDH1L2, have been structurally and functionally characterized, providing a framework for targeted experiments. This article summarizes the authoritative definition, the biochemical steps, the genes involved, disease links, and the CRISPR-based methods used to interrogate this pathway.
10-formyltetrahydrofolate catabolic process At A Glance
| GO ID | GO:0009258 |
|---|---|
| GO term | 10-formyltetrahydrofolate catabolic process |
| Ontology | biological_process |
| Synonym | 10-formyltetrahydrofolate breakdown; 10-formyltetrahydrofolate catabolism; 10-formyltetrahydrofolate degradation; 10-formyl-THF catabolic process; 10-formyl-THF catabolism |
| Major function | Breakdown of 10-formyltetrahydrofolate to regulate one-carbon pools, formate production, and folate homeostasis |
| Key enzymes | ALDH1L1 (cytosolic 10-formyltetrahydrofolate dehydrogenase), ALDH1L2 (mitochondrial) |
| Substrates | 10-formyltetrahydrofolate, NADP+ |
| Products | Tetrahydrofolate, CO2, NADPH |
| Related pathways | One-carbon metabolism, purine biosynthesis, methionine cycle, formate metabolism |
What Is GO:0009258?
According to the Gene Ontology, GO:0009258 (10-formyltetrahydrofolate catabolic process) is defined as the chemical reactions and pathways resulting in the breakdown of 10-formyltetrahydrofolate, the formylated derivative of tetrahydrofolate. In practical terms, it covers the enzymatic conversion of 10-formyl-THF into other folate species, carbon dioxide, and one-carbon units, thereby regulating the cellular pool of this critical cofactor.
Why Is 10-formyltetrahydrofolate catabolic process Important in Cell Biology?
GO:0009258 is important because it controls the cellular concentration of 10-formyl-THF, a central one-carbon donor required for de novo purine synthesis and formate production. By degrading 10-formyl-THF, cells avoid excessive accumulation of this reactive folate species and balance the flux of one-carbon units between nucleotide synthesis, methylation reactions, and mitochondrial metabolism. Dysregulation of this catabolic process has been linked to altered cancer cell migration, metastasis, and redox balance, making it a potential target for therapeutic intervention. Moreover, the process intersects with glycine metabolism in the liver, highlighting its systemic metabolic importance.
• Regulates the availability of 10-formyl-THF for purine biosynthesis, directly impacting DNA and RNA synthesis.
• Controls formate production, which can be used for nucleotide synthesis or cause toxicity when in excess.
• Modulates reactive oxygen species (ROS) levels and cancer cell migration/metastasis through ALDH1L2.
• Influences glycine metabolism in the liver via cytosolic ALDH1L1.
• Provides a metabolic link between folate status and mitochondrial function, including complex IV activity.
• Is relevant to antifolate drug resistance and chemotherapy efficacy.
• Plays a role in Leishmania folate metabolism, suggesting evolutionary conservation and potential drug targets.
• Contributes to the regulation of 5,10-methenyltetrahydrofolate synthetase activity and folate interconversion.
• May affect epigenetic methylation potential by altering one-carbon flux.
• Serves as a biomarker or therapeutic target in cancers with altered folate metabolism.
What Happens During 10-formyltetrahydrofolate catabolic process?
Substrate recognition and binding
In simple terms: The enzyme grabs 10-formyl-THF and prepares it for breakdown.
The catabolic process begins when enzymes such as ALDH1L1 and ALDH1L2 bind 10-formyltetrahydrofolate. Structural studies of ALDH1L1 reveal a conserved folate-binding domain that positions the formyl group for oxidation. This binding is essential for the subsequent NADP+-dependent dehydrogenation step.
NADP+-dependent oxidation to 10-formyldihydrofolate
In simple terms: The enzyme removes electrons from 10-formyl-THF, converting it to a related molecule.
The first chemical step involves the oxidation of 10-formyl-THF to 10-formyldihydrofolate, a reaction that can also be catalyzed by mitochondrial complex IV in rat mitochondria. This step is NADP+-dependent and generates NADPH, linking catabolism to cellular redox balance.
Hydrolysis and release of formate/CO2
In simple terms: The modified folate is broken down further, releasing one-carbon units.
Following oxidation, 10-formyldihydrofolate is hydrolyzed to tetrahydrofolate and formate, or further metabolized to CO2. In humans, 10-formyldihydrofolate can be metabolized to 10-formyl-THF and other folate species, indicating a reversible network. The release of formate is critical because formate can serve as a one-carbon donor for purine synthesis or be excreted.
Regeneration of tetrahydrofolate
In simple terms: The process regenerates the basic folate carrier, ready to accept new one-carbon units.
The final step regenerates tetrahydrofolate (THF), which can re-enter the folate cycle to accept one-carbon units from serine or other donors. This regeneration is vital for maintaining the pool of reduced folates required for nucleotide biosynthesis and methionine cycle.
Integration with glycine and mitochondrial metabolism
In simple terms: The breakdown of 10-formyl-THF is connected to other metabolic pathways in the liver and mitochondria.
Cytosolic ALDH1L1 regulates glycine metabolism in mouse liver, demonstrating that 10-formyl-THF catabolism is integrated with amino acid metabolism. Mitochondrial ALDH1L2 influences formate and ROS levels, affecting cancer cell behavior. These connections highlight the pathway's role beyond simple folate degradation.
Key Genes Involved in GO:0009258 10-formyltetrahydrofolate catabolic process
The following genes and proteins are directly involved in or regulate the 10-formyltetrahydrofolate catabolic process.
| Gene | Major Role | Research Relevance |
|---|---|---|
| ALDH1L1 | Cytosolic 10-formyltetrahydrofolate dehydrogenase; catalyzes oxidation of 10-formyl-THF to CO2 and THF | Tumor suppressor candidate; regulates glycine metabolism and folate homeostasis |
| ALDH1L2 | Mitochondrial 10-formyltetrahydrofolate dehydrogenase; controls formate, formyl-methionine, and ROS | Linked to cancer cell migration and metastasis; potential therapeutic target |
| MTHFD1 | C1-tetrahydrofolate synthase; interconverts folate species including 10-formyl-THF | Provides substrate for catabolic process; affects purine synthesis |
| MTHFD2 | Mitochondrial methylenetetrahydrofolate dehydrogenase; contributes to mitochondrial one-carbon flux | Supports formate production and redox balance |
| SHMT1 | Serine hydroxymethyltransferase; generates 5,10-methylene-THF for folate cycle | Indirectly supplies 10-formyl-THF through folate interconversion |
| SHMT2 | Mitochondrial serine hydroxymethyltransferase; key source of one-carbon units | Affects mitochondrial 10-formyl-THF levels and catabolism |
| MTHFR | Methylenetetrahydrofolate reductase; directs folate toward methionine synthesis | Competes with catabolic pathway for folate intermediates |
| GART | Phosphoribosylglycinamide formyltransferase; uses 10-formyl-THF for purine synthesis | Consumes 10-formyl-THF, balancing catabolism |
| ATIC | AICAR transformylase; utilizes 10-formyl-THF in purine biosynthesis | Links catabolic process to nucleotide production |
| MTR | Methionine synthase; uses 5-methyl-THF, indirectly affecting folate pools | Influences one-carbon flux and 10-formyl-THF availability |
| MTHFS | 5,10-methenyltetrahydrofolate synthetase; interconverts 10-formyl-THF and 5,10-methenyl-THF | Regulates 10-formyl-THF levels and catabolism |
| FTCD | Formimidoyltransferase cyclodeaminase; links folate and histidine metabolism | May affect one-carbon pool and 10-formyl-THF catabolism |
| DHFR | Dihydrofolate reductase; regenerates THF from dihydrofolate | Supports folate cycle and catabolic process |
| TYMS | Thymidylate synthase; uses 5,10-methylene-THF for dTMP synthesis | Competes with catabolic pathway for folate cofactors |
| GCSH | Glycine cleavage system H protein; involved in glycine metabolism | Linked to ALDH1L1 regulation of glycine |
| GLDC | Glycine decarboxylase; contributes to one-carbon metabolism | Interacts with folate catabolism in liver |
| AMT | Aminomethyltransferase; part of glycine cleavage system | Affects one-carbon supply for 10-formyl-THF |
| SLC25A32 | Mitochondrial folate transporter; imports folates into mitochondria | Essential for mitochondrial 10-formyl-THF catabolism |
How Is 10-formyltetrahydrofolate catabolic process Regulated?
The 10-formyltetrahydrofolate catabolic process is regulated at multiple levels. Enzyme expression of ALDH1L1 and ALDH1L2 is tissue-specific and can be altered in cancer. Allosteric regulation by NADP+/NADPH ratio influences dehydrogenase activity. Additionally, the process is indirectly regulated by the availability of one-carbon donors such as serine and glycine, and by mitochondrial complex IV activity that can oxidize 10-formyl-THF. Inhibition of 5,10-methenyltetrahydrofolate synthetase (MTHFS) affects the interconversion of 10-formyl-THF and 5,10-methenyl-THF, thereby modulating catabolic flux. In liver, ALDH1L1 expression is linked to glycine metabolism, suggesting metabolic feedback.
10-formyltetrahydrofolate catabolic process and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| ALDH1L2 | Cancer metastasis, ROS regulation | Knockout and overexpression in cancer cell lines; migration assays |
| ALDH1L1 | Tumor suppression, liver glycine metabolism | Liver-specific knockout mice; glycine flux analysis |
| MTHFS | Folate interconversion, potential antifolate resistance | Point mutation of catalytic residues; enzyme kinetics |
| MTHFD1 | Purine synthesis disorders, folate-responsive conditions | Knock-in of patient variants; metabolic profiling |
| SLC25A32 | Mitochondrial folate transport defects | Knockout in cell lines; mitochondrial folate measurement |
Cancer and metastasis
ALDH1L2, the mitochondrial enzyme that catabolizes 10-formyl-THF, regulates formate, formyl-methionine, and ROS levels, and its loss promotes cancer cell migration and metastasis. ALDH1L1 is a putative tumor suppressor, and its downregulation is observed in several cancers. These findings suggest that 10-formyl-THF catabolism suppresses malignant phenotypes by controlling one-carbon flux and redox balance.
Metabolic and liver disorders
Cytosolic ALDH1L1 regulates glycine metabolism in mouse liver, and its deficiency may alter hepatic one-carbon metabolism. Disruption of folate catabolism can lead to imbalances in glycine and serine, contributing to metabolic disorders.
Infectious disease
Folate metabolic pathways, including 10-formyl-THF catabolism, are essential in Leishmania parasites, making them potential targets for antiparasitic drugs. The unique features of parasite folate enzymes could be exploited for selective inhibition.
Developmental and neurological implications
Folate metabolism is critical for neural tube development and brain function. Although direct links between GO:0009258 and neurodevelopmental disorders are not fully established, altered one-carbon metabolism can affect methylation and nucleotide synthesis, which are vital for development.
From 10-formyltetrahydrofolate catabolic process-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does ALDH1L2 loss increase metastasis? | ALDH1L2 knockout cancer cell lines and mouse xenografts |
| How does ALDH1L1 regulate glycine metabolism? | Liver-specific ALDH1L1 knockout mice |
| What is the catalytic mechanism of ALDH1L1? | Point mutations in ALDH1L1 active site, recombinant protein assays |
| Can 10-formyl-THF catabolism be visualized in live cells? | Knock-in of fluorescently tagged ALDH1L2 |
| Does overexpression of ALDH1L1 suppress tumor growth? | ALDH1L1 overexpression in cancer cell lines and mouse models |
| How does MTHFS inhibition affect folate pools? | MTHFS knockout or point-mutation cell lines, metabolomics |
How to Study the 10-formyltetrahydrofolate catabolic process Process
| Method | What It Measures | Typical Application |
|---|---|---|
| LC-MS metabolomics | Levels of 10-formyl-THF, THF, and other folates | Quantifying pathway flux in cells and tissues |
| Stable isotope tracing | Incorporation of labeled one-carbon units into nucleotides | Measuring formate and purine synthesis |
| Enzyme activity assay | NADPH production by ALDH1L1/ALDH1L2 | Characterizing mutants and inhibitors |
| CRISPR knockout screens | Gene essentiality and drug sensitivity | Identifying regulators of folate metabolism |
| Western blot | Protein expression of ALDH1L1/ALDH1L2 | Validating knockout or overexpression |
| Immunofluorescence | Subcellular localization of enzymes | Studying mitochondrial vs cytosolic pools |
| RNA-seq | Transcriptional changes upon pathway perturbation | Identifying compensatory pathways |
| Seahorse assay | ROS and mitochondrial respiration | Linking catabolism to redox balance |
Metabolomics and flux analysis
Liquid chromatography-mass spectrometry (LC-MS) can quantify 10-formyl-THF and related folate species to assess catabolic flux. Stable isotope tracing with 13C-serine or 13C-formate helps measure one-carbon flux through the pathway.
Enzyme activity assays
Recombinant ALDH1L1/ALDH1L2 can be used in NADP+-dependent dehydrogenase assays to measure catalytic activity and kinetics. These assays are useful for testing point mutations identified in disease.
CRISPR-based genetic screens
Genome-wide CRISPR knockout screens can identify genes that modulate sensitivity to antifolates or that regulate 10-formyl-THF levels. Such screens can uncover synthetic lethal interactions with ALDH1L2 loss.
Imaging and subcellular localization
Fluorescently tagged ALDH1L1 or ALDH1L2 can be imaged to study subcellular localization and dynamics. Mitochondrial-targeted sensors can report changes in one-carbon metabolism.
How CRISPR Can Be Used to Study GO:0009258 10-formyltetrahydrofolate catabolic process
Knockout
CRISPR knockout of ALDH1L1 or ALDH1L2 in cell lines abolishes 10-formyl-THF catabolism, leading to accumulation of 10-formyl-THF and altered one-carbon flux. These models are used to study cancer cell migration, ROS levels, and glycine metabolism.
Point Mutation
Point mutations in the catalytic domain of ALDH1L1 (e.g., active-site residues) can be introduced to dissect the enzymatic mechanism and to model patient variants. Such mutants help distinguish catalytic activity from structural roles.
Knock-in
Knock-in of fluorescent tags (e.g., GFP) at the endogenous ALDH1L2 locus allows real-time tracking of enzyme localization and dynamics without overexpression artifacts. Knock-in of disease-associated variants can model their impact on folate metabolism.
Overexpression
Overexpression of ALDH1L1 or ALDH1L2 using CRISPR activation or lentiviral vectors can test whether increased catabolism suppresses tumor growth or alters redox balance. These models are useful for gain-of-function studies.
How EDITGENE Supports 10-formyltetrahydrofolate catabolic process Research
Researchers studying 10-formyltetrahydrofolate catabolic process-related genes often need to determine whether a candidate gene is causally involved in metabolic regulation, disease progression, or drug response. EDITGENE provides comprehensive CRISPR-based services to generate precisely engineered cell models, enabling rigorous functional validation of genes in this pathway.
Contact EDITGENE today to design your custom CRISPR model for 10-formyltetrahydrofolate catabolic process research.
Frequently Asked Questions About 10-formyltetrahydrofolate catabolic process
What is 10-formyltetrahydrofolate catabolic process?
It is the biological process (GO:0009258) that breaks down 10-formyltetrahydrofolate, a formylated derivative of tetrahydrofolate, into other folate species and one-carbon units.
What genes are involved in 10-formyltetrahydrofolate catabolic process?
Key genes include ALDH1L1, ALDH1L2, MTHFS, MTHFD1, and MTHFD2, which encode enzymes that directly or indirectly regulate the catabolism of 10-formyl-THF.
Which enzymes catalyze the breakdown of 10-formyltetrahydrofolate?
ALDH1L1 (cytosolic) and ALDH1L2 (mitochondrial) are the primary dehydrogenases that oxidize 10-formyl-THF to CO2 and THF.
Why is 10-formyltetrahydrofolate catabolism important in cancer?
It controls formate and ROS levels; loss of ALDH1L2 promotes cancer cell migration and metastasis, while ALDH1L1 is a putative tumor suppressor.
How is 10-formyltetrahydrofolate catabolic process regulated?
It is regulated by enzyme expression, NADP+/NADPH ratio, substrate availability, and interconversion with 5,10-methenyl-THF via MTHFS.
What diseases are linked to 10-formyltetrahydrofolate catabolic process?
Cancer metastasis, liver metabolic disorders, and infectious diseases like Leishmaniasis have been associated with altered folate catabolism.
How can I study 10-formyltetrahydrofolate catabolic process in the lab?
Use LC-MS metabolomics, enzyme activity assays, CRISPR knockout/overexpression models, and stable isotope tracing.
What is the role of ALDH1L2 in 10-formyltetrahydrofolate catabolism?
ALDH1L2 is the mitochondrial dehydrogenase that catabolizes 10-formyl-THF, regulating formate, formyl-methionine, and ROS to control cancer cell migration.
Can CRISPR be used to model 10-formyltetrahydrofolate catabolic process?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression are powerful tools to dissect gene function in this pathway.
What are the products of 10-formyltetrahydrofolate catabolism?
The process yields tetrahydrofolate, CO2, and formate, which can be used for purine synthesis or excreted.
Conclusion
GO:0009258 (10-formyltetrahydrofolate catabolic process) is a critical metabolic pathway that regulates one-carbon flux, formate production, and redox balance. Its dysregulation is implicated in cancer progression, liver metabolism, and infectious diseases. Understanding the enzymes and regulatory mechanisms involved offers opportunities for therapeutic intervention. CRISPR-based models are indispensable for functional validation of genes in this pathway, and EDITGENE provides end-to-end services to accelerate such research.
References
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- 3. Tsybovsky Y et al.. 2022. Structure of putative tumor suppressor ALDH1L1.. Commun Biol 5(1):3 PMID: 35013550
- 4. Vickers TJ et al.. 2011. Folate metabolic pathways in Leishmania.. Essays Biochem 51:63-80 PMID: 22023442
- 5. Baggott JE et al.. 2015. Folate-Dependent Purine Nucleotide Biosynthesis in Humans.. Adv Nutr 6(5):564-71 PMID: 26374178
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- 7. Brookes PS et al.. 2002. Oxidation of 10-formyltetrahydrofolate to 10-formyldihydrofolate by complex IV of rat mitochondria.. Biochemistry 41(17):5633-6 PMID: 11969424
- 8. Krupenko NI et al.. 2019. Cytosolic 10-formyltetrahydrofolate dehydrogenase regulates glycine metabolism in mouse liver.. Sci Rep 9(1):14937 PMID: 31624291
