GO:0047952 glycerol-3-phosphate dehydrogenase [NAD(P)+] activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0047952 describes the molecular function of glycerol-3-phosphate dehydrogenase [NAD(P)+] activity, which catalyzes the reversible oxidation of sn-glycerol 3-phosphate to glycerone phosphate using NAD(P)+ as an electron acceptor.
• This activity is central to lipid biosynthesis, energy metabolism, and redox balance, and is conserved from bacteria to humans.
• Structural studies reveal that the enzyme is a monotopic membrane protein with a Rossmann-fold NAD(P)-binding domain and a substrate-binding pocket that undergoes conformational changes upon ligand binding.
• Dysregulation of glycerol-3-phosphate dehydrogenase activity is linked to obesity, metabolic disorders, and cancer, making it a potential therapeutic target.
• CRISPR-based knockout, point mutation, and knock-in models are powerful tools to dissect the precise roles of this enzyme in health and disease.
• Researchers can leverage EDITGENE's services to generate custom cell models for studying glycerol-3-phosphate dehydrogenase [NAD(P)+] activity and its interacting partners.
Description
Glycerol-3-phosphate dehydrogenase [NAD(P)+] activity (GO:0047952) is a fundamental enzymatic function that catalyzes the reversible conversion of sn-glycerol 3-phosphate to glycerone phosphate, coupled with the reduction of NAD(P)+ to NAD(P)H. This reaction sits at the crossroads of glycolysis, gluconeogenesis, and lipid metabolism, and is essential for maintaining cellular redox homeostasis and energy balance. The enzyme is widely distributed across all domains of life, from archaea and bacteria to humans, underscoring its evolutionary importance. In eukaryotes, it participates in the glycerol-3-phosphate shuttle, which transfers reducing equivalents from the cytosol to the mitochondria for oxidative phosphorylation. Given its central metabolic role, understanding the regulation and function of this activity is critical for researchers studying metabolic diseases, cancer, and microbial physiology.
glycerol-3-phosphate dehydrogenase [NAD(P)+] activity At A Glance
| GO ID | GO:0047952 |
|---|---|
| GO term | glycerol-3-phosphate dehydrogenase [NAD(P)+] activity |
| Ontology | molecular_function |
| Synonym | glycerol-3-phosphate dehydrogenase (NAD(P)+) activity; L-alpha-glycerophosphate dehydrogenase activity; sn-glycerol-3-phosphate:NAD(P)+ 2-oxidoreductase activity |
| Major function | Catalyzes the reversible oxidation of sn-glycerol 3-phosphate to glycerone phosphate using NAD(P)+ as an electron acceptor |
| Reaction | sn-glycerol 3-phosphate + NAD(P)+ = glycerone phosphate + NAD(P)H + H+ |
| Cofactor | NAD+ or NADP+ (nicotinamide adenine dinucleotide (phosphate)) |
| Subcellular location | Cytoplasm, mitochondria, and membrane-associated (monotopic membrane protein in some organisms) |
| EC number | 1.1.1.94 (according to IUBMB) |
What Is GO:0047952?
According to the Gene Ontology, GO:0047952 is defined as the catalysis of the reaction: sn-glycerol 3-phosphate + NAD(P)+ = glycerone phosphate + NAD(P)H + H+. In other words, it is the oxidoreductase activity that removes two electrons from glycerol-3-phosphate, transferring them to either NAD+ or NADP+ to form the corresponding reduced coenzyme, while converting the substrate to glycerone phosphate (dihydroxyacetone phosphate). This activity is reversible and can function in both catabolic and anabolic directions depending on cellular conditions.
Why Is glycerol-3-phosphate dehydrogenase [NAD(P)+] activity Important in Cell Biology?
Glycerol-3-phosphate dehydrogenase [NAD(P)+] activity is a key node in cellular metabolism, linking carbohydrate and lipid pathways. It is essential for the production of glycerol-3-phosphate, a precursor for phospholipid and triacylglycerol synthesis, and for the regeneration of NAD+ in the cytosol under anaerobic conditions. In humans, increased activity in adipose tissue is associated with obesity, and the enzyme has been implicated in cancer metabolism and insulin resistance. In microorganisms, it plays a critical role in osmotolerance and energy metabolism. Thus, understanding this activity is vital for both basic biology and translational research.
• Central to the glycerol-3-phosphate shuttle, which transfers reducing equivalents from cytosol to mitochondria for ATP production.
• Provides glycerol-3-phosphate for phospholipid and triacylglycerol biosynthesis, impacting membrane biogenesis and energy storage.
• Regulates redox balance by regenerating NAD+ from NADH, especially under anaerobic conditions.
• Linked to obesity: enhanced activity in adipose tissue of obese humans suggests a role in fat accumulation.
• Involved in cancer metabolism, where altered lipid synthesis supports rapid proliferation.
• Essential for osmotolerance in yeast, where glycerol production counteracts osmotic stress.
• Target for antimicrobial drug discovery in pathogens like Leishmania and Haloferax.
• Plays a role in Drosophila larval development, coordinating growth and carbohydrate metabolism.
• Structural insights from crystal structures guide mutagenesis and inhibitor design.
• CRISPR-based models enable precise functional dissection in disease contexts.
What Happens During glycerol-3-phosphate dehydrogenase [NAD(P)+] activity?
Substrate Binding and Conformational Change
In simple terms: The enzyme grabs its substrate and changes shape to hold it tightly.
The catalytic cycle begins with the binding of sn-glycerol 3-phosphate to the active site. Structural studies of human and Leishmania enzymes have shown that the substrate induces a conformational change, closing the active site over the substrate to exclude water and promote catalysis. This induced-fit mechanism ensures high specificity for the glycerol moiety and positions the C2 hydroxyl for hydride transfer.
Hydride Transfer to NAD(P)+
In simple terms: The enzyme removes two electrons from the substrate and gives them to NAD+ or NADP+.
Once bound, the enzyme catalyzes the transfer of a hydride ion from the C2 carbon of glycerol-3-phosphate to the nicotinamide ring of NAD(P)+. This step is stereospecific, with the pro-S hydrogen of the substrate being removed. The reaction is reversible, and the equilibrium can favor either direction depending on the cellular redox state and substrate availability.
Product Release and Enzyme Reset
In simple terms: The products leave, and the enzyme is ready for another round.
After hydride transfer, glycerone phosphate and NAD(P)H are released. The enzyme returns to its open conformation, ready for another catalytic cycle. Mutagenesis studies have identified key residues that facilitate product release, and their alteration can affect catalytic efficiency.
Membrane Association and Oligomeric State
In simple terms: Some versions of the enzyme attach to membranes and work as dimers or tetramers.
In many organisms, glycerol-3-phosphate dehydrogenase is a monotopic membrane protein that inserts into the membrane via a hydrophobic loop but does not span it. The enzyme often functions as a dimer or tetramer, and oligomerization can regulate activity. For example, the Escherichia coli enzyme is a dimer, while the human cytosolic enzyme is a homodimer.
Key Genes Involved in GO:0047952 glycerol-3-phosphate dehydrogenase [NAD(P)+] activity
The following genes encode proteins with glycerol-3-phosphate dehydrogenase [NAD(P)+] activity or are directly involved in its regulation and metabolic context.
| Gene | Major Role | Research Relevance |
|---|---|---|
| GPD1 | Cytosolic glycerol-3-phosphate dehydrogenase (NAD+) | Osmotolerance in yeast; metabolic engineering |
| GPD2 | Mitochondrial glycerol-3-phosphate dehydrogenase (NAD+) | Glycerol-3-phosphate shuttle; energy metabolism |
| GPD1L | Human cytosolic glycerol-3-phosphate dehydrogenase-like | Cardiac metabolism; cancer |
| GPD2 (human) | Mitochondrial glycerol-3-phosphate dehydrogenase | Insulin secretion; obesity |
| GPDH (Drosophila) | Glycerol-3-phosphate dehydrogenase | Larval development; carbohydrate metabolism |
| GlpD (E. coli) | Aerobic glycerol-3-phosphate dehydrogenase | Respiration; membrane enzyme model |
| GlpA/GlpB (E. coli) | Anaerobic glycerol-3-phosphate dehydrogenase | Anaerobic metabolism |
| GPD (Leishmania) | Glycerol-3-phosphate dehydrogenase | Parasite metabolism; drug target |
| GPD (Haloferax) | Glycerol-3-phosphate dehydrogenase | Haloarchaeal metabolism |
| GPD1 (S. cerevisiae) | NAD+-dependent glycerol-3-phosphate dehydrogenase | Osmotic stress response |
| mGPDH | Mitochondrial glycerol-3-phosphate dehydrogenase | Thermogenesis; ROS production |
| cGPDH | Cytosolic glycerol-3-phosphate dehydrogenase | Glycolysis; NAD+ regeneration |
| GPD1L (human) | Glycerol-3-phosphate dehydrogenase 1-like | Hypoxia response; cancer |
| GPD2 (mouse) | Mitochondrial glycerol-3-phosphate dehydrogenase | Knockout models for metabolism |
| GPDH (Drosophila) | NAD+-dependent glycerol-3-phosphate dehydrogenase | Developmental genetics |
| GlpD (Bacillus) | Glycerol-3-phosphate dehydrogenase | Spore germination |
| GPD (Trypanosoma) | Glycerol-3-phosphate dehydrogenase | Glycosome metabolism |
| GPD (Plasmodium) | Glycerol-3-phosphate dehydrogenase | Malaria metabolism |
How Is glycerol-3-phosphate dehydrogenase [NAD(P)+] activity Regulated?
The activity of glycerol-3-phosphate dehydrogenase [NAD(P)+] is regulated at multiple levels. In yeast, GPD1 expression is induced by osmotic stress via the HOG pathway, leading to increased glycerol production. In mammals, the enzyme is regulated by hormonal signals and nutrient availability; for example, insulin stimulates glycerol-3-phosphate dehydrogenase activity in adipose tissue, contributing to fat storage. Transcriptional regulation by hypoxia-inducible factors (HIFs) has been reported for GPD1L, linking it to oxygen sensing. Additionally, the enzyme can be post-translationally modified, and its activity is sensitive to the cellular NAD+/NADH ratio.
glycerol-3-phosphate dehydrogenase [NAD(P)+] activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| GPD1L | Cancer, hypoxia response | Knockout in cancer cell lines; xenograft models |
| GPD2 | Obesity, insulin resistance | Tissue-specific knockout mice; adipocyte cultures |
| GPDH (Drosophila) | Developmental growth | RNAi knockdown; CRISPR knockout in Drosophila |
| GPD (Leishmania) | Leishmaniasis | Parasite knockout; macrophage infection models |
| GPD (Haloferax) | Haloarchaeal metabolism | Gene deletion in Haloferax volcanii |
Obesity and Metabolic Syndrome
Enhanced glycerol-3-phosphate dehydrogenase activity in adipose tissue is associated with obesity in humans, suggesting that increased flux through this enzyme contributes to triacylglycerol accumulation and adipocyte hypertrophy. Targeting this activity may offer therapeutic benefits for metabolic disorders.
Cancer Metabolism
Cancer cells often exhibit altered lipid metabolism to support rapid proliferation. Glycerol-3-phosphate dehydrogenase provides glycerol-3-phosphate for phospholipid synthesis, and its upregulation has been observed in certain cancers. In Drosophila, the enzyme cooperates with lactate dehydrogenase to regulate growth, highlighting a conserved role in proliferative metabolism.
Infectious Diseases
Glycerol-3-phosphate dehydrogenase is essential for the survival of pathogens such as Leishmania mexicana and Haloferax volcanii, making it a potential drug target. Structural studies of the Leishmania enzyme have revealed unique features that could be exploited for selective inhibition.
From glycerol-3-phosphate dehydrogenase [NAD(P)+] activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| What is the effect of complete loss of glycerol-3-phosphate dehydrogenase activity on cell viability? | CRISPR knockout of GPD1/GPD2 in human cell lines |
| How does a specific point mutation in the active site affect catalytic efficiency? | CRISPR point mutation (e.g., H195A) in GPD1L |
| Can a tagged version of the enzyme be used to study its localization? | Knock-in of GFP or FLAG tag at the endogenous locus |
| What happens when the enzyme is overexpressed in adipocytes? | Overexpression of GPD2 via lentiviral transduction |
| Which genes interact with glycerol-3-phosphate dehydrogenase in cancer cells? | Genome-wide CRISPR library screening |
| How does the enzyme contribute to osmotolerance in yeast? | CRISPR knockout of GPD1 in Saccharomyces cerevisiae |
How to Study the glycerol-3-phosphate dehydrogenase [NAD(P)+] activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| NADH absorbance assay | Enzyme activity (NADH production) | Kinetic studies, inhibitor screening |
| X-ray crystallography | Three-dimensional structure | Active site mapping, mutagenesis guidance |
| RNA-seq | Gene expression levels | Regulation under stress, disease |
| CRISPR knockout | Loss-of-function phenotype | Essentiality, metabolic role |
| Site-directed mutagenesis | Effect of point mutations | Catalytic mechanism |
| Metabolic flux analysis | Flux through pathway | Quantitative metabolism |
| Western blot | Protein expression and modification | Validation of knockout/overexpression |
| Immunofluorescence | Subcellular localization | Membrane association, organelle targeting |
Enzymatic Activity Assays
Direct measurement of glycerol-3-phosphate dehydrogenase activity is typically performed by monitoring the reduction of NAD+ to NADH at 340 nm in the presence of glycerol-3-phosphate. This assay can be used to determine kinetic parameters (Km, Vmax) and to screen for inhibitors.
Structural Biology
X-ray crystallography and cryo-EM have provided high-resolution structures of glycerol-3-phosphate dehydrogenase from human, bacterial, and parasitic sources. These structures reveal the active site architecture and guide mutagenesis studies.
Transcriptomics and Proteomics
RNA-seq and quantitative proteomics can measure expression levels of GPD genes under different conditions, such as osmotic stress or hypoxia. These approaches help identify regulatory pathways and co-expressed genes.
Metabolic Flux Analysis
Isotope tracing with 13C-labeled substrates combined with mass spectrometry can quantify flux through glycerol-3-phosphate dehydrogenase in living cells, providing insights into its contribution to central carbon metabolism.
How CRISPR Can Be Used to Study GO:0047952 glycerol-3-phosphate dehydrogenase [NAD(P)+] activity
Knockout
CRISPR-Cas9 knockout of GPD1, GPD2, or GPD1L can completely abolish glycerol-3-phosphate dehydrogenase activity, allowing researchers to study its role in cell proliferation, lipid synthesis, and redox balance. For example, knockout of GPD1 in yeast results in osmotolerance defects, while knockout in cancer cells can reduce tumor growth.
Point Mutation
Introducing specific point mutations (e.g., in the NAD-binding site or catalytic residues) via CRISPR base editing or homology-directed repair can dissect the contribution of individual amino acids to catalysis. Such mutations have been guided by crystal structures and mutagenesis studies.
Knock-in
Knock-in of epitope tags (e.g., GFP, FLAG) or fluorescent proteins at the endogenous GPD locus enables real-time tracking of protein localization and interaction without overexpression artifacts. This approach has been used to study membrane association of the enzyme.
Overexpression
CRISPR activation (CRISPRa) or lentiviral overexpression of GPD genes can elevate enzyme levels to study gain-of-function phenotypes, such as increased lipid accumulation in adipocytes or enhanced osmotolerance in yeast.
How EDITGENE Supports glycerol-3-phosphate dehydrogenase [NAD(P)+] activity Research
Researchers studying glycerol-3-phosphate dehydrogenase [NAD(P)+] activity-related genes often need to determine whether a candidate gene is causally involved in a specific metabolic or disease phenotype. This requires precise genetic models that can knockout, mutate, tag, or overexpress the gene of interest in relevant cell types. EDITGENE provides a comprehensive suite of CRISPR services to accelerate such investigations.
Contact EDITGENE today to design your custom CRISPR model for glycerol-3-phosphate dehydrogenase [NAD(P)+] activity research.
Frequently Asked Questions About glycerol-3-phosphate dehydrogenase [NAD(P)+] activity
What is glycerol-3-phosphate dehydrogenase [NAD(P)+] activity?
It is the enzymatic activity defined by GO:0047952 that catalyzes the reversible oxidation of sn-glycerol 3-phosphate to glycerone phosphate using NAD+ or NADP+ as an electron acceptor.
What genes are involved in glycerol-3-phosphate dehydrogenase [NAD(P)+] activity?
Key genes include GPD1, GPD2, GPD1L in humans, GPD1 in yeast, GlpD in E. coli, and GPDH in Drosophila.
What is the role of glycerol-3-phosphate dehydrogenase in obesity?
Enhanced activity in adipose tissue is associated with obesity, likely contributing to increased triacylglycerol synthesis and fat storage.
How is glycerol-3-phosphate dehydrogenase regulated?
It is regulated transcriptionally by osmotic stress and hypoxia, and post-translationally by the cellular redox state.
What diseases are linked to glycerol-3-phosphate dehydrogenase dysfunction?
Obesity, cancer, and infectious diseases caused by parasites like Leishmania are linked to this enzyme.
What is the glycerol-3-phosphate shuttle?
It is a metabolic pathway that uses glycerol-3-phosphate dehydrogenase to transfer reducing equivalents from cytosolic NADH to mitochondrial FADH2 for ATP production.
How can CRISPR be used to study glycerol-3-phosphate dehydrogenase?
CRISPR knockout, point mutation, knock-in, and overexpression models allow precise manipulation of GPD genes to study their function in cells and organisms.
What is the structure of glycerol-3-phosphate dehydrogenase?
It typically has a Rossmann-fold NAD-binding domain and a substrate-binding domain; some are monotopic membrane proteins.
What is the reaction catalyzed by GO:0047952?
sn-glycerol 3-phosphate + NAD(P)+ = glycerone phosphate + NAD(P)H + H+.
Why is glycerol-3-phosphate dehydrogenase important for metabolism?
It links carbohydrate and lipid metabolism, maintains redox balance, and provides precursors for membrane lipids.
Conclusion
Glycerol-3-phosphate dehydrogenase [NAD(P)+] activity (GO:0047952) is a fundamental enzymatic function with far-reaching implications for cellular metabolism, disease, and biotechnology. Its ability to interconvert glycerol-3-phosphate and glycerone phosphate while balancing NAD(P)+/NAD(P)H levels places it at the heart of energy homeostasis and lipid biosynthesis. Continued research using advanced CRISPR models and structural techniques will further illuminate its roles and therapeutic potential.
References
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- 2. Mydy LS et al.. 2019. Human Glycerol 3-Phosphate Dehydrogenase: X-ray Crystal Structures That Guide the Interpretation of Mutagenesis Studies.. Biochemistry 58(8):1061-1073 PMID: 30640445
- 3. Yeh JI et al.. 2008. Structure of glycerol-3-phosphate dehydrogenase, an essential monotopic membrane enzyme involved in respiration and metabolism.. Proc Natl Acad Sci U S A 105(9):3280-5 PMID: 18296637
- 4. Blomberg A et al.. 1989. Roles of glycerol and glycerol-3-phosphate dehydrogenase (NAD+) in acquired osmotolerance of Saccharomyces cerevisiae.. J Bacteriol 171(2):1087-92 PMID: 2644223
- 5. Choe J et al.. 2003. Leishmania mexicana glycerol-3-phosphate dehydrogenase showed conformational changes upon binding a bi-substrate adduct.. J Mol Biol 329(2):335-49 PMID: 12758080
- 6. Rawls KS et al.. 2011. Activity and transcriptional regulation of bacterial protein-like glycerol-3-phosphate dehydrogenase of the haloarchaea in Haloferax volcanii.. J Bacteriol 193(17):4469-76 PMID: 21725010
- 7. Li H et al.. 2019. Lactate dehydrogenase and glycerol-3-phosphate dehydrogenase cooperatively regulate growth and carbohydrate metabolism during Drosophila melanogaster larval development.. Development 146(17) PMID: 31399469
- 8. Weissman JD et al.. 1982. DPN-linked sn-glycerol-3-phosphate dehydrogenase. Cyclopentanoid analogues mimic the active rotameric state of the natural substrate.. J Biol Chem 257(7):3618-22 PMID: 6801051
