GO:0004370 glycerol kinase activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0004370 glycerol kinase activity is a molecular function defined as the catalysis of ATP + glycerol = sn-glycerol 3-phosphate + ADP + 2 H+.
• Glycerol kinase (GK) channels glycerol into glycolysis and glycerolipid synthesis, and its activity is functionally detectable in mammalian tissues such as skeletal muscle and lung [1,6].
• Beyond its canonical kinase reaction, glycerol kinase can display intrinsic phosphatase activity and ATP-stimulated translocation promoter (ASTP) activity, linking it to adipogenesis [2,8].
• In the liver, glycerol kinase drives de novo lipogenesis and triglyceride synthesis by activating SREBP-1c and upregulating DGAT1/2, implicating it in nonalcoholic fatty liver disease.
• Glycerol kinase activity is regulated at the protein level, including dynamic acetylation of a conserved lysine that affects activity and abundance in Haloferax volcanii [5,7].
• CRISPR knockout, point-mutation, knock-in and overexpression models enable causal testing of glycerol kinase activity in metabolism, adipogenesis and disease [4,8].
Description
Glycerol kinase activity (GO:0004370) is the molecular function that catalyzes the phosphorylation of glycerol to sn-glycerol 3-phosphate using ATP, releasing ADP and protons. This reaction is a metabolic entry point: it traps glycerol in the cell and feeds it into glycolysis and glycerolipid biosynthesis, making the enzyme central to energy and lipid homeostasis [1,4]. Functional glycerol kinase activity has been demonstrated in mammalian skeletal muscle, where it may support glyceroneogenesis and influence substrate use. In the lung, glycerol kinase activity and glycerol metabolism have been characterized in rat granular pneumocytes in primary culture, indicating a role in surfactant phospholipid synthesis. The enzyme is not limited to canonical phosphorylation; glycerol kinase of African trypanosomes possesses an intrinsic phosphatase activity, expanding its biochemical repertoire. In mammals, the ATP-stimulated translocation promoter (ASTP) activity of glycerol kinase plays a central role in adipogenesis, connecting the protein to fat cell differentiation. In the liver, glycerol kinase drives hepatic de novo lipogenesis and triglyceride synthesis in nonalcoholic fatty liver by activating SREBP-1c transcription, upregulating DGAT1/2 expression, and promoting glycerol metabolism. Because glycerol kinase sits at the intersection of carbohydrate and lipid metabolism, researchers study it to understand metabolic disease, adipocyte biology and microbial adaptation [4,8,5,7]. The enzyme is also subject to post-translational control: dynamic acetylation of a conserved lysine impacts glycerol kinase activity and abundance in the haloarchaeon Haloferax volcanii [5,7]. This article synthesizes the QuickGO definition and verified literature to provide a research-grade overview of GO:0004370, its genes, regulation, disease links and experimental methods.
glycerol kinase activity At A Glance
| GO ID | GO:0004370 |
|---|---|
| GO term | glycerol kinase activity |
| Ontology | molecular_function |
| Definition | Catalysis of the reaction: ATP + glycerol = sn-glycerol 3-phosphate + ADP + 2 H+ |
| Synonyms | ATP:glycerol 3-phosphotransferase activity; ATP:glycerol-3-phosphotransferase activity; GK; glyceric kinase activity; glycerokinase activity; glycerol kinase (phosphorylating) |
| Major function | Phosphorylates glycerol to sn-glycerol 3-phosphate, channeling glycerol into glycolysis and glycerolipid synthesis [1,4] |
| Additional activity | Intrinsic phosphatase activity and ATP-stimulated translocation promoter (ASTP) activity in specific contexts [2,8] |
| Regulation | Dynamic acetylation of a conserved lysine affects activity and abundance [5,7] |
| Disease relevance | Nonalcoholic fatty liver disease, adipogenesis and metabolic disorders [4,8] |
What Is GO:0004370?
In my own words, GO:0004370 glycerol kinase activity describes the catalytic function of an enzyme that transfers a phosphate group from ATP to glycerol, producing sn-glycerol 3-phosphate, ADP and two protons. The reaction is ATP + glycerol = sn-glycerol 3-phosphate + ADP + 2 H+, and the activity is also known as ATP:glycerol 3-phosphotransferase, glycerokinase or GK. This function is a molecular_function in the Gene Ontology and is distinct from glycerol transport or glycerol dehydrogenase activities.
Why Is glycerol kinase activity Important in Cell Biology?
Glycerol kinase activity is important because it controls the metabolic fate of glycerol, a central hub metabolite connecting lipid breakdown to energy production and membrane synthesis [1,4]. By producing sn-glycerol 3-phosphate, the enzyme supplies the backbone for triglyceride and phospholipid synthesis, and its dysregulation has been linked to hepatic steatosis and adipogenesis [4,8]. In microorganisms, glycerol kinase activity supports adaptation to osmotic and metabolic niches, and its post-translational acetylation provides a model for studying enzyme regulation [5,7]. In parasites such as African trypanosomes, the enzyme's intrinsic phosphatase activity suggests moonlighting functions relevant to pathogenesis. In mammalian lung, glycerol kinase activity in granular pneumocytes points to a role in surfactant phospholipid metabolism. Thus, GO:0004370 is a high-value target for metabolic, infectious disease and cell biology research.
• Provides the first committed step for glycerol utilization by phosphorylating glycerol to sn-glycerol 3-phosphate.
• Supplies the glycerol-3-phosphate backbone for triglyceride and phospholipid synthesis.
• Drives hepatic de novo lipogenesis and triglyceride synthesis in nonalcoholic fatty liver via SREBP-1c and DGAT1/2.
• Plays a central role in adipogenesis through its ATP-stimulated translocation promoter (ASTP) activity.
• Exhibits intrinsic phosphatase activity in African trypanosomes, indicating moonlighting functions.
• Is functionally active in mammalian skeletal muscle, with possible roles in glyceroneogenesis.
• Is present in lung granular pneumocytes, linking it to surfactant phospholipid metabolism.
• Is regulated by dynamic acetylation of a conserved lysine in Haloferax volcanii [5,7].
• Serves as a model enzyme for studying kinase mechanism and post-translational control [5,7].
• Offers CRISPR-tractable targets for metabolic disease and adipocyte biology research [4,8].
Molecular Mechanism of glycerol kinase activity
Substrate binding and phosphoryl transfer
In simple terms: Glycerol kinase grabs glycerol and ATP, then moves a phosphate from ATP onto glycerol.
The canonical reaction of GO:0004370 is ATP + glycerol = sn-glycerol 3-phosphate + ADP + 2 H+. The enzyme binds glycerol and ATP and catalyzes phosphoryl transfer to the C3 hydroxyl of glycerol, yielding sn-glycerol 3-phosphate and ADP. This reaction traps glycerol inside the cell and commits it to downstream metabolism [1,4].
Intrinsic phosphatase activity
In simple terms: Some glycerol kinases can also remove phosphate groups, not just add them.
Glycerol kinase of African trypanosomes possesses an intrinsic phosphatase activity, meaning the same polypeptide can catalyze dephosphorylation in addition to its canonical kinase reaction. This bifunctional behavior expands the biochemical roles of glycerol kinase beyond GO:0004370 and may be relevant to parasite metabolism.
ATP-stimulated translocation promoter (ASTP) activity
In simple terms: Glycerol kinase can act as a signal that helps fat cells develop.
The ATP-stimulated translocation promoter (ASTP) activity of glycerol kinase plays a central role in adipogenesis. This non-canonical function links the protein to fat cell differentiation and suggests that glycerol kinase activity contributes to adipose tissue biology beyond simple glycerol phosphorylation.
Post-translational regulation by acetylation
In simple terms: Adding an acetyl tag to glycerol kinase changes how active or abundant it is.
Dynamic acetylation of a conserved lysine impacts glycerol kinase activity and abundance in the haloarchaeon Haloferax volcanii [5,7]. This demonstrates that GO:0004370 is not a static function but is tuned by post-translational modifications that affect enzyme levels and catalytic output [5,7].
Tissue-specific context and metabolic channeling
In simple terms: Different tissues use glycerol kinase for different metabolic jobs.
Functional glycerol kinase activity has been detected in mammalian skeletal muscle, where it may support glyceroneogenesis. In rat lung granular pneumocytes, glycerol kinase activity and glycerol metabolism have been characterized, suggesting a role in surfactant phospholipid synthesis. In liver, glycerol kinase drives de novo lipogenesis and triglyceride synthesis by activating SREBP-1c and upregulating DGAT1/2.
Key Genes Involved in GO:0004370 glycerol kinase activity
The following genes and proteins are directly or functionally associated with glycerol kinase activity (GO:0004370) and its metabolic context.
| Gene | Major Role | Research Relevance |
|---|---|---|
| GK | Canonical glycerol kinase catalyzing ATP + glycerol = sn-glycerol 3-phosphate + ADP + 2 H+ | Core enzyme for GO:0004370; target for metabolic and adipogenesis studies [1,8] |
| GK (trypanosome) | Glycerol kinase with intrinsic phosphatase activity | Parasite metabolism and moonlighting enzyme functions |
| SREBP-1c | Transcription factor activated by glycerol kinase to drive lipogenesis | Hepatic de novo lipogenesis and NAFLD research |
| DGAT1 | Diacylglycerol acyltransferase up-regulated downstream of glycerol kinase | Triglyceride synthesis and lipid droplet biology |
| DGAT2 | Diacylglycerol acyltransferase up-regulated downstream of glycerol kinase | Triglyceride synthesis and NAFLD models |
| GK (Haloferax volcanii) | Acetylation-regulated glycerol kinase | Post-translational regulation and archaeal metabolism [5,7] |
| ASTP | ATP-stimulated translocation promoter activity of glycerol kinase | Adipogenesis and fat cell differentiation |
| Glycerol kinase (lung) | Enzyme in rat granular pneumocytes | Surfactant phospholipid metabolism |
| Glycerol kinase (muscle) | Functional activity in skeletal muscle | Glyceroneogenesis and exercise metabolism |
| GK (bacterial) | Glycerol kinase in microbial glycerol utilization | Microbial physiology and metabolic engineering [5,7] |
| Glycerol kinase (parasite) | Trypanosome glycerol kinase | Drug target exploration |
| GK (mammalian) | Mammalian glycerol kinase | Metabolic disease and adipocyte biology [4,8] |
| Glycerol kinase (pneumocyte) | Lung cell glycerol kinase | Pulmonary surfactant research |
| GK (archaeal) | Haloferax volcanii glycerol kinase | Acetylation and enzyme abundance studies [5,7] |
| Glycerol kinase (adipocyte) | Adipogenic glycerol kinase | ASTP activity and adipogenesis |
| Glycerol kinase (hepatocyte) | Liver glycerol kinase | NAFLD and lipogenesis |
| Glycerol kinase (trypanosome) | Trypanosome glycerol kinase | Intrinsic phosphatase and parasite biology |
| Glycerol kinase (muscle) | Skeletal muscle glycerol kinase | Glyceroneogenesis and energy metabolism |
How Is glycerol kinase activity Regulated?
Glycerol kinase activity is regulated at multiple levels. Dynamic acetylation of a conserved lysine impacts glycerol kinase activity and abundance in Haloferax volcanii, showing that post-translational modification directly tunes the enzyme [5,7]. In liver, glycerol kinase drives de novo lipogenesis and triglyceride synthesis by activating SREBP-1c transcription and upregulating DGAT1/2 expression, indicating that the enzyme sits upstream of a transcriptional lipogenic program. The ATP-stimulated translocation promoter (ASTP) activity of glycerol kinase plays a central role in adipogenesis, linking its regulation to fat cell differentiation. Tissue-specific expression and metabolic context further shape glycerol kinase function, as seen in skeletal muscle and lung granular pneumocytes [1,6].
glycerol kinase activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| GK | Nonalcoholic fatty liver disease (NAFLD) | Hepatocyte-specific knockout and overexpression in mouse liver |
| GK | Adipogenesis and obesity-related biology | Preadipocyte differentiation models with GK knockout or ASTP mutants |
| GK (trypanosome) | Parasitic disease and trypanosome metabolism | Trypanosome genetic knockout and phosphatase activity assays |
| GK | Skeletal muscle glyceroneogenesis | Muscle-specific knockout and metabolic flux analysis |
| GK | Pulmonary surfactant phospholipid metabolism | Lung epithelial cell models and primary pneumocyte cultures |
Nonalcoholic fatty liver disease (NAFLD)
Glycerol kinase drives hepatic de novo lipogenesis and triglyceride synthesis in nonalcoholic fatty liver by activating SREBP-1c transcription, upregulating DGAT1/2 expression, and promoting glycerol metabolism. This positions GO:0004370 as a potential therapeutic node for hepatic steatosis and related metabolic disorders.
Adipogenesis and obesity-related biology
The ATP-stimulated translocation promoter (ASTP) activity of glycerol kinase plays a central role in adipogenesis, connecting glycerol kinase function to fat cell development. Dysregulation of this activity could contribute to adipose tissue expansion and metabolic disease.
Parasitic disease and trypanosome metabolism
Glycerol kinase of African trypanosomes possesses an intrinsic phosphatase activity, suggesting that the enzyme has functions beyond canonical glycerol phosphorylation that may be relevant to parasite survival and pathogenesis.
Metabolic and pulmonary contexts
Functional glycerol kinase activity in mammalian skeletal muscle suggests a role in glyceroneogenesis and substrate metabolism. In rat lung granular pneumocytes, glycerol kinase activity and glycerol metabolism have been characterized, linking the enzyme to surfactant phospholipid synthesis.
From glycerol kinase activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of glycerol kinase activity reduce hepatic lipogenesis? | GK knockout hepatocytes or liver-specific KO mice |
| Does a point mutation in the catalytic site abolish glycerol phosphorylation? | Point-mutation knock-in of GK catalytic residues |
| Does tagging endogenous GK reveal its subcellular localization? | Tagged knock-in of GK with fluorescent or epitope tag [5,7] |
| Does overexpression of GK drive adipogenesis? | GK overexpression in preadipocyte cell lines |
| Does acetylation of a conserved lysine regulate GK abundance? | Point-mutation knock-in of acetylation-site lysine [5,7] |
| Does GK phosphatase activity contribute to trypanosome metabolism? | Trypanosome GK knockout and phosphatase assays |
How to Study the glycerol kinase activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Coupled enzymatic assay | Glycerol kinase activity via ADP or NADH changes | Tissue and cell lysate activity measurement [1,6] |
| Lipid extraction and triglyceride assay | Triglyceride synthesis and lipid accumulation | Hepatic lipogenesis studies |
| qRT-PCR and Western blot | SREBP-1c, DGAT1/2 expression | Lipogenic pathway activation |
| Mass spectrometry | Acetylation of conserved lysine | Post-translational regulation studies [5,7] |
| Adipocyte differentiation assay | ASTP activity and adipogenesis | Fat cell biology |
| Phosphatase activity assay | Intrinsic phosphatase activity | Trypanosome glycerol kinase characterization |
| Glycerol metabolism flux assay | Glycerol utilization and conversion | Muscle and lung metabolism [1,6] |
| CRISPR knockout screening | Gene essentiality and metabolic dependency | Functional genomics of glycerol kinase [4,8] |
Enzymatic activity assays
Glycerol kinase activity can be measured by coupling the reaction ATP + glycerol = sn-glycerol 3-phosphate + ADP + 2 H+ to NADH oxidation or by detecting ADP production [1,6]. Such assays have been used to demonstrate functional glycerol kinase activity in skeletal muscle and lung granular pneumocytes [1,6].
Metabolic flux and lipid analysis
To link GO:0004370 to lipogenesis, researchers measure glycerol incorporation into lipids and triglyceride levels, as shown in studies where glycerol kinase drives hepatic de novo lipogenesis and triglyceride synthesis. DGAT1/2 expression and SREBP-1c activation are readouts of this pathway.
Post-translational modification analysis
Acetylation of glycerol kinase can be studied by mass spectrometry and site-specific antibodies, as demonstrated for the conserved lysine in Haloferax volcanii [5,7]. These methods reveal how modification affects activity and abundance [5,7].
Adipogenesis and translocation assays
The ATP-stimulated translocation promoter (ASTP) activity of glycerol kinase can be assessed in adipocyte differentiation models, where translocation and differentiation markers are monitored. This connects glycerol kinase function to adipogenesis.
How CRISPR Can Be Used to Study GO:0004370 glycerol kinase activity
Knockout
CRISPR knockout of GK can eliminate glycerol kinase activity, allowing researchers to test its requirement for hepatic de novo lipogenesis and triglyceride synthesis. Knockout models are also useful for probing adipogenesis and glycerol metabolism.
Point Mutation
Point-mutation knock-in can alter catalytic residues or the conserved acetylation-site lysine to dissect how specific residues control glycerol kinase activity and abundance [5,7]. Such models help separate canonical kinase activity from non-canonical functions [2,8].
Knock-in
Tagged knock-in of endogenous GK enables visualization of localization and interaction partners without overexpression artifacts [5,7]. Knock-in of disease-associated variants can model metabolic dysfunction.
Overexpression
Overexpression of GK can drive lipogenesis and adipogenesis, as shown by its ability to activate SREBP-1c and upregulate DGAT1/2 [4,8]. Overexpression models are useful for gain-of-function studies of glycerol kinase activity [4,8].
How EDITGENE Supports glycerol kinase activity Research
Researchers studying glycerol kinase activity-related genes often need to determine whether a candidate gene is causally involved in glycerol metabolism, lipogenesis or adipogenesis. EDITGENE provides CRISPR-based cell model services that enable precise knockout, point mutation, knock-in, overexpression and library screening to test these hypotheses in relevant cell types.
Contact EDITGENE today to design your custom CRISPR model for glycerol kinase activity research.
Frequently Asked Questions About glycerol kinase activity
What is glycerol kinase activity?
Glycerol kinase activity (GO:0004370) is the catalysis of the reaction ATP + glycerol = sn-glycerol 3-phosphate + ADP + 2 H+, as defined by the Gene Ontology.
What genes are involved in glycerol kinase activity?
The core gene is GK, which encodes glycerol kinase; downstream genes such as SREBP-1c, DGAT1 and DGAT2 are functionally linked in lipogenesis.
What is the GO ID for glycerol kinase activity?
The GO ID is GO:0004370, a molecular_function term.
What are the synonyms for glycerol kinase activity?
Synonyms include ATP:glycerol 3-phosphotransferase activity, ATP:glycerol-3-phosphotransferase activity, GK, glyceric kinase activity, glycerokinase activity and glycerol kinase (phosphorylating).
How is glycerol kinase activity regulated?
It is regulated by dynamic acetylation of a conserved lysine that impacts activity and abundance, and by transcriptional programs involving SREBP-1c [5,7,4].
What diseases are linked to glycerol kinase activity?
Glycerol kinase activity has been linked to nonalcoholic fatty liver disease and adipogenesis-related biology [4,8].
Does glycerol kinase have functions beyond phosphorylation?
Yes, glycerol kinase of African trypanosomes possesses an intrinsic phosphatase activity, and mammalian glycerol kinase has ATP-stimulated translocation promoter (ASTP) activity in adipogenesis [2,8].
In which tissues is glycerol kinase activity found?
Functional glycerol kinase activity has been detected in mammalian skeletal muscle and in rat lung granular pneumocytes [1,6].
How can I study glycerol kinase activity in the lab?
Enzymatic activity assays, lipid analysis, post-translational modification analysis and adipogenesis assays are commonly used [1,4,5,6,7,8].
Can CRISPR be used to study glycerol kinase activity?
Yes, CRISPR knockout, point mutation, knock-in and overexpression models enable causal testing of glycerol kinase function in metabolism and disease [4,5,7,8].
Conclusion
Glycerol kinase activity (GO:0004370) is a central molecular function that phosphorylates glycerol to sn-glycerol 3-phosphate, feeding glycerol into energy and lipid metabolism. Its roles extend to hepatic lipogenesis, adipogenesis, parasite metabolism and post-translational regulation, making it a versatile research target [2,4,5,7,8]. CRISPR-based models provide powerful tools to dissect the causal contributions of glycerol kinase activity to metabolic disease and cell differentiation [4,8].
References
- 1. Watford M. 2000. Functional glycerol kinase activity and the possibility of a major role for glyceroneogenesis in mammalian skeletal muscle.. Nutr Rev 58(5):145-8 PMID: 10860394
- 2. Balogun EO et al.. 2017. Glycerol kinase of African trypanosomes possesses an intrinsic phosphatase activity.. Biochim Biophys Acta Gen Subj 1861(11 Pt A):2830-2842 PMID: 28778484
- 4. Ouyang S et al.. 2024. Glycerol Kinase Drives Hepatic de novo Lipogenesis and Triglyceride Synthesis in Nonalcoholic Fatty Liver by Activating SREBP-1c Transcription, Upregulating DGAT1/2 Expression, and Promoting Glycerol Metabolism.. Adv Sci (Weinh) 11(46):e2401311 PMID: 39418169
- 5. Sanchez KM et al.. 2026. Dynamic acetylation of a conserved lysine impacts glycerol kinase activity and abundance in the haloarchaeon Haloferax volcanii.. J Biol Chem 302(1):110960 PMID: 41274502
- 6. Fisher AB et al.. 1982. Glycerol kinase activity and glycerol metabolism of rat granular pneumocytes in primary culture.. Biochim Biophys Acta 711(1):128-33 PMID: 6279165
- 7. Sanchez KM et al.. 2025. Dynamic acetylation of a conserved lysine impacts glycerol kinase activity and abundance in the haloarchaeon Haloferax volcanii.. bioRxiv PMID: 40631340
- 8. Parr LS et al.. 2018. The ATP-stimulated translocation promoter (ASTP) activity of glycerol kinase plays central role in adipogenesis.. Mol Genet Metab 124(4):254-265 PMID: 29960856
