GO:0008609 alkylglycerone-phosphate synthase activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0008609 alkylglycerone-phosphate synthase activity catalyzes the formation of 1-alkyl-glycerone 3-phosphate from 1-acyl-glycerone 3-phosphate and a long-chain alcohol, a key step in ether lipid biosynthesis.
• The enzyme, often called alkyl-DHAP synthase, is localized in peroxisomes and is essential for the synthesis of ether phospholipids such as plasmalogens.
• Alkylglycerone-phosphate synthase activity is upregulated in several cancers, including glioma, thyroid cancer, and gastric cancer, where it promotes tumor progression and metabolic reprogramming [3,5,6,7].
• Inhibitors targeting alkylglycerone-phosphate synthase have been developed and show anti-tumor activity in vitro, making it a potential therapeutic target [1,2,8].
• Studying this activity involves techniques such as subcellular fractionation, enzyme assays, CRISPR knockout, and lipidomics [4,8].
• Dysregulation of ether lipid synthesis is linked to cancer, and Helicobacter pylori CagA-mediated ether lipid biosynthesis promotes ferroptosis susceptibility in gastric cancer.
Description
Alkylglycerone-phosphate synthase activity (GO:0008609) is a molecular function that catalyzes a critical reaction in ether lipid biosynthesis: the exchange of an acyl group for a long-chain alcohol on glycerone phosphate, yielding 1-alkyl-glycerone 3-phosphate. This activity is essential for the production of ether phospholipids, including plasmalogens, which are important components of cell membranes and signaling molecules. The enzyme responsible, alkylglycerone phosphate synthase (AGPS), is localized primarily in peroxisomes, and its dysfunction has been implicated in various human diseases. In recent years, AGPS has emerged as a promising target in cancer research due to its role in tumor metabolism and progression [3,5,6,7]. Understanding the molecular mechanism, regulation, and disease relevance of this activity is crucial for developing targeted therapies and diagnostic tools [1,2,8].
alkylglycerone-phosphate synthase activity At A Glance
| GO ID | GO:0008609 |
|---|---|
| GO term | alkylglycerone-phosphate synthase activity |
| Ontology | molecular_function |
| Synonym | alkyl-DHAP synthase activity; alkyldihydroxyacetonephosphate synthase activity; DHAP-AT; dihydroxyacetone-phosphate acyltransferase activity |
| Major function | Catalyzes the formation of 1-alkyl-glycerone 3-phosphate from 1-acyl-glycerone 3-phosphate and a long-chain alcohol |
| Reaction | 1-acyl-glycerone 3-phosphate + a long-chain alcohol = 1-alkyl-glycerone 3-phosphate + a long-chain acid anion |
| Subcellular location | Peroxisome (in rat liver, as shown by subcellular fractionation) |
| Pathway | Ether lipid biosynthesis |
What Is GO:0008609?
Alkylglycerone-phosphate synthase activity (GO:0008609) is defined as the catalysis of the reaction: 1-acyl-glycerone 3-phosphate + a long-chain alcohol = 1-alkyl-glycerone 3-phosphate + a long-chain acid anion. This enzymatic activity is responsible for the formation of the ether bond in ether lipids, a key step in the biosynthesis of plasmalogens and other ether phospholipids.
Why Is alkylglycerone-phosphate synthase activity Important in Cell Biology?
Alkylglycerone-phosphate synthase activity is essential for the biosynthesis of ether lipids, which are critical for membrane structure, signaling, and antioxidant defense. Its dysregulation has been linked to cancer progression, making it a target for therapeutic intervention [3,5,6,7,8]. Moreover, the enzyme's role in peroxisomal metabolism connects it to neurological disorders and metabolic diseases.
• Essential for the synthesis of plasmalogens, a major class of ether phospholipids in cell membranes.
• Upregulated in multiple cancers, including glioma, thyroid cancer, and gastric cancer, where it promotes tumor growth and invasion [3,5,6,7].
• Inhibition of alkylglycerone-phosphate synthase activity reduces ether lipid levels and reverses epithelial-mesenchymal transition in cancer cells.
• Helicobacter pylori CagA-mediated ether lipid biosynthesis promotes ferroptosis susceptibility in gastric cancer, highlighting a role in infection-related cancer.
• Potential therapeutic target for cancer, with small-molecule inhibitors showing anti-tumor activity in vitro [1,2,8].
• Involved in peroxisomal disorders and potentially neurodegenerative diseases due to impaired ether lipid synthesis.
• Regulated by signaling pathways such as NF-κB and microRNAs, offering additional targets for intervention.
• Its activity can be modulated by Tudor-staphylococcal nuclease, affecting glioma cell biology.
• Alkylglycerone-phosphate synthase expression affects circRNA profiles, suggesting broader regulatory roles.
• Enzyme structure-based drug design has led to novel compounds with predicted favorable pharmacokinetics [1,2].
What Happens During alkylglycerone-phosphate synthase activity?
Substrate Binding and Acyl Exchange
In simple terms: The enzyme grabs a fatty acid molecule and swaps it with a fatty alcohol.
Alkylglycerone-phosphate synthase binds 1-acyl-glycerone 3-phosphate and a long-chain alcohol. The enzyme catalyzes the exchange of the acyl group for the alcohol, forming an ether bond and releasing a long-chain acid anion. This reaction is the committed step in ether lipid biosynthesis.
Formation of 1-Alkyl-Glycerone 3-Phosphate
In simple terms: The product is a key building block for ether lipids.
The product, 1-alkyl-glycerone 3-phosphate, is a precursor for plasmalogens and other ether phospholipids. This step is essential for the synthesis of these specialized membrane lipids.
Peroxisomal Localization
In simple terms: This reaction happens inside peroxisomes, small organelles in the cell.
Subcellular fractionation studies in rat liver have shown that alkylglycerone-phosphate synthase activity is predominantly localized in peroxisomes. This compartmentalization ensures efficient ether lipid synthesis and integration with other peroxisomal metabolic pathways.
Role in Ether Lipid Pathway
In simple terms: This enzyme is a key player in making ether lipids, which are important for cell membranes.
Alkylglycerone-phosphate synthase activity is a critical step in the ether lipid biosynthetic pathway. Downstream enzymes further modify 1-alkyl-glycerone 3-phosphate to produce plasmalogens and other ether phospholipids, which are involved in membrane structure, signaling, and antioxidant functions.
Key Genes Involved in GO:0008609 alkylglycerone-phosphate synthase activity
The following genes and proteins are directly or indirectly associated with alkylglycerone-phosphate synthase activity, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| AGPS | Encodes alkylglycerone phosphate synthase, the enzyme catalyzing the reaction | Upregulated in glioma, thyroid cancer, gastric cancer; target for inhibitors [3,5,6,7,8] |
| Tudor-SN | Regulates AGPS expression via NF-κB and miR-127 | Modulates AGPS in glioma U87MG cells |
| NF-κB | Transcription factor regulating AGPS expression | Involved in AGPS regulation in glioma |
| miR-127 | MicroRNA regulating AGPS expression | Post-transcriptional regulation of AGPS |
| CagA | Helicobacter pylori effector protein that promotes ether lipid biosynthesis | Linked to ferroptosis susceptibility in gastric cancer |
| FAR1 | Fatty acyl-CoA reductase, supplies long-chain alcohols for ether lipid synthesis | Potential partner in ether lipid pathway |
| GNPAT | Glyceronephosphate O-acyltransferase, generates 1-acyl-glycerone 3-phosphate | Upstream enzyme in ether lipid synthesis |
| PEX genes | Peroxisomal biogenesis factors | Mutations cause peroxisomal disorders affecting AGPS localization |
| circRNAs | Circular RNAs whose expression is affected by AGPS | Potential biomarkers in thyroid cancer |
| Temozolomide derivatives | Designed based on AGPS structure | Anti-tumor activity in vitro |
| Nitrogenous heterocyclic compounds | AGPS-targeting compounds | ADME/toxicity prediction and antitumor activity |
| AGPS inhibitors | Small molecules inhibiting AGPS | Reduce ether lipids and EMT in cancer cells |
| Plasmalogens | Ether phospholipids synthesized downstream of AGPS | Important for membrane function and antioxidant defense |
| Ferroptosis regulators | Proteins involved in ferroptosis | Modulated by ether lipid biosynthesis in gastric cancer |
| EMT markers | Epithelial-mesenchymal transition proteins | Affected by AGPS inhibition |
| Glioma invasion factors | Proteins involved in cell invasion | AGPS suppresses invasion in glioma and hepatic carcinoma |
| Hepatic carcinoma factors | Proteins involved in liver cancer | AGPS role in invasion suppression |
| Thyroid cancer markers | Proteins associated with thyroid cancer | AGPS affects circRNA profile |
How Is alkylglycerone-phosphate synthase activity Regulated?
Alkylglycerone-phosphate synthase activity is regulated at multiple levels. In glioma cells, Tudor-staphylococcal nuclease regulates AGPS expression via nuclear factor-κB and microRNA-127. Additionally, AGPS expression can be influenced by oncogenic signaling pathways, and its activity is modulated by substrate availability and peroxisomal function. Inhibitors targeting AGPS have been developed, which can reduce ether lipid levels and affect epithelial-mesenchymal transition in cancer cells.
alkylglycerone-phosphate synthase activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| AGPS | Glioma | U87MG knockout/overexpression [6,7] |
| AGPS | Thyroid cancer | FRO cell line knockout |
| AGPS | Gastric cancer | CagA-expressing gastric cancer cells |
| AGPS | Epithelial-mesenchymal transition | Cancer cell lines treated with inhibitors |
| AGPS | Peroxisomal disorders | Patient-derived fibroblasts or PEX knockout models |
Cancer
Alkylglycerone-phosphate synthase activity is upregulated in several cancers, including glioma, thyroid cancer, and gastric cancer. In glioma, AGPS expression is regulated by Tudor-SN via NF-κB and miR-127, and its inhibition reduces invasion [6,7]. In thyroid cancer, AGPS affects the expression profile of circRNAs, suggesting a role in tumor biology. In gastric cancer, Helicobacter pylori CagA-mediated ether lipid biosynthesis promotes ferroptosis susceptibility, linking AGPS activity to infection-related cancer. Inhibitors of AGPS show anti-tumor activity in vitro, highlighting its therapeutic potential [1,2,8].
Peroxisomal Disorders
Given its peroxisomal localization, alkylglycerone-phosphate synthase activity is likely affected in peroxisomal biogenesis disorders, although direct evidence from the provided citations is limited. Impaired ether lipid synthesis can lead to neurological and metabolic abnormalities.
Metabolic Reprogramming
AGPS activity contributes to metabolic reprogramming in cancer cells by supporting ether lipid synthesis, which is important for membrane formation and signaling during rapid proliferation [3,8].
From alkylglycerone-phosphate synthase activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does AGPS loss affect ether lipid levels? | AGPS knockout cell lines (e.g., U87MG, FRO) [5,6] |
| Does a specific point mutation in AGPS alter catalytic activity? | Point-mutation knock-in via CRISPR |
| Can AGPS be tagged for localization studies? | Knock-in of fluorescent tag (e.g., GFP) |
| Does AGPS overexpression promote tumor growth? | Overexpression in cancer cell lines |
| What is the effect of AGPS inhibitors on EMT? | Cancer cells treated with inhibitors |
| How does AGPS regulate circRNA profiles? | AGPS knockout/overexpression followed by RNA-seq |
How to Study the alkylglycerone-phosphate synthase activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Enzyme assay | Catalytic activity of AGPS | Subcellular fractions, recombinant enzyme |
| CRISPR knockout | Loss-of-function effects | Cancer cell lines [5,6,7] |
| Lipidomics | Ether lipid levels | Cells with AGPS modulation |
| RNA-seq | Transcriptome changes | AGPS knockout/overexpression |
| Western blot | Protein expression | AGPS regulation studies |
| Immunofluorescence | Subcellular localization | Peroxisomal localization |
| qPCR | mRNA levels | AGPS expression |
| CircRNA profiling | Circular RNA expression | Thyroid cancer cells |
Enzyme Activity Assays
Alkylglycerone-phosphate synthase activity can be measured using radiolabeled substrates or mass spectrometry-based assays. Subcellular fractionation followed by enzyme assays is used to determine localization and specific activity.
CRISPR-Cas9 Knockout
CRISPR knockout of AGPS in cancer cell lines allows researchers to study the consequences of loss of function on ether lipid synthesis, cell invasion, and tumor growth [5,6,7].
Lipidomics
Mass spectrometry-based lipidomics can quantify ether lipids, including plasmalogens, to assess the impact of AGPS modulation.
RNA Sequencing
RNA-seq can reveal changes in gene expression, including circRNA profiles, upon AGPS knockout or overexpression.
How CRISPR Can Be Used to Study GO:0008609 alkylglycerone-phosphate synthase activity
Knockout
CRISPR-Cas9 knockout of AGPS is used to completely abolish alkylglycerone-phosphate synthase activity, enabling studies on ether lipid depletion, cancer cell proliferation, and invasion [5,6,7].
Point Mutation
Point mutations can be introduced into the AGPS gene to study catalytic residues or regulatory sites, helping to dissect the molecular mechanism of the enzyme.
Knock-in
Knock-in of tags (e.g., GFP) or specific mutations allows for real-time tracking of AGPS localization and function in live cells.
Overexpression
Overexpression of AGPS via CRISPR activation or lentiviral vectors can model the upregulation seen in cancers and study its effects on tumorigenesis.
How EDITGENE Supports alkylglycerone-phosphate synthase activity Research
Researchers studying alkylglycerone-phosphate synthase activity-related genes often need to determine whether a candidate gene is causally involved in ether lipid metabolism, cancer progression, or peroxisomal function. EDITGENE provides a comprehensive suite of CRISPR-based services to facilitate these investigations.
Contact EDITGENE today to design your custom CRISPR model for alkylglycerone-phosphate synthase activity research.
Frequently Asked Questions About alkylglycerone-phosphate synthase activity
What is alkylglycerone-phosphate synthase activity?
It is a molecular function (GO:0008609) that catalyzes the formation of 1-alkyl-glycerone 3-phosphate from 1-acyl-glycerone 3-phosphate and a long-chain alcohol, a key step in ether lipid biosynthesis.
What genes are involved in alkylglycerone-phosphate synthase activity?
The primary gene is AGPS, which encodes the enzyme. Other related genes include GNPAT, FAR1, and regulators like NF-κB and miR-127 [4,6].
Where does alkylglycerone-phosphate synthase activity occur in the cell?
It is localized in peroxisomes, as shown by subcellular fractionation studies in rat liver.
What diseases are associated with alkylglycerone-phosphate synthase activity?
It is linked to cancer (glioma, thyroid, gastric), peroxisomal disorders, and metabolic reprogramming [3,5,6,7].
How is alkylglycerone-phosphate synthase activity regulated?
It is regulated by Tudor-SN via NF-κB and miR-127, and by substrate availability.
What are inhibitors of alkylglycerone-phosphate synthase?
Small-molecule inhibitors have been developed, such as temozolomide derivatives and nitrogenous heterocyclic compounds, showing anti-tumor activity [1,2,8].
What methods are used to study alkylglycerone-phosphate synthase activity?
Enzyme assays, CRISPR knockout, lipidomics, RNA-seq, and subcellular fractionation are common methods [4,5,8].
How does AGPS affect cancer cells?
AGPS promotes ether lipid synthesis, supporting membrane formation and signaling, and its inhibition reduces invasion and EMT [7,8].
What is the role of AGPS in ferroptosis?
In gastric cancer, CagA-mediated ether lipid biosynthesis promotes ferroptosis susceptibility.
Can CRISPR be used to study AGPS function?
Yes, CRISPR knockout, knock-in, and overexpression models are widely used to dissect AGPS function in cancer and metabolism [5,6,7].
Conclusion
Alkylglycerone-phosphate synthase activity (GO:0008609) is a critical enzymatic function in ether lipid biosynthesis, with significant implications for cancer biology and peroxisomal disorders. Its regulation by signaling pathways and microRNAs, along with its upregulation in multiple cancers, makes it an attractive target for therapeutic development. Researchers can leverage CRISPR-based models and advanced omics techniques to further elucidate its mechanisms and identify novel interventions.
References
- 1. Yang B et al.. 2018. Computer-aided design of temozolomide derivatives based on alkylglycerone phosphate synthase structure with isothiocyanate and their pharmacokinetic/toxicity prediction and anti-tumor activity in vitro.. Biomed Rep 8(3):235-240 PMID: 29599977
- 2. Zhu Y et al.. 2018. ADME/toxicity prediction and antitumor activity of novel nitrogenous heterocyclic compounds designed by computer targeting of alkylglycerone phosphate synthase.. Oncol Lett 16(2):1431-1438 PMID: 30008821
- 3. Peng Y et al.. 2024. Helicobacter pylori CagA-mediated ether lipid biosynthesis promotes ferroptosis susceptibility in gastric cancer.. Exp Mol Med 56(2):441-452 PMID: 38383581
- 4. Rabert U et al.. 1986. Distribution of alkylglycerone-phosphate synthase in subcellular fractions of rat liver.. Biol Chem Hoppe Seyler 367(3):215-22 PMID: 3707712
- 5. Hou S et al.. 2018. Effect of alkylglycerone phosphate synthase on the expression profile of circRNAs in the human thyroid cancer cell line FRO.. Oncol Lett 15(5):7889-7899 PMID: 29731907
- 6. Zhang Y et al.. 2018. Tudor-staphylococcal nuclease regulates the expression and biological function of alkylglycerone phosphate synthase via nuclear factor-κB and microRNA-127 in human glioma U87MG cells.. Oncol Lett 15(6):9553-9558 PMID: 29805677
- 7. Zhu Y et al.. 2014. Role and mechanism of the alkylglycerone phosphate synthase in suppressing the invasion potential of human glioma and hepatic carcinoma cells in vitro.. Oncol Rep 32(1):431-6 PMID: 24841318
- 8. Stazi G et al.. 2019. Development of alkyl glycerone phosphate synthase inhibitors: Structure-activity relationship and effects on ether lipids and epithelial-mesenchymal transition in cancer cells.. Eur J Med Chem 163:722-735 PMID: 30576903
