Glyceraldehyde-3-Phosphate Dehydrogenase Functions in Cellular Mechanisms

Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is classically known as a glycolytic enzyme catalysing the conversion of glyceraldehyde-3-phosphate to 1,3-bisphosphoglycerate, thereby contributing to ATP production. Beyond its metabolic role, GAPDH serves as a redox sensor, shifting flux from glycolysis to the oxidative pentose phosphate pathway in response to oxidative stress. It also engages in non-canonical functions, including modulation of apoptosis, autophagy, DNA repair and RNA export through post-translational modifications and protein-protein interactions. Nuclear translocation of GAPDH influences gene transcription, while its aggregates can trigger mitochondrial dysfunction leading to cell death. In immune cells, GAPDH participates in the fine-tuning of inflammatory responses by linking metabolic reprogramming to cytokine production. The pleiotropic nature of GAPDH underpins its involvement in tumour progression, neurodegeneration and ischaemia–reperfusion injury, making it a focal point for therapeutic intervention across a spectrum of diseases.

Research from Nature Portfolio

Recent studies have shown that a redox-sensitive cysteine in GAPDH acts as a metabolic switch under peroxide stress, inactivating its dehydrogenase activity and diverting metabolites into the pentose phosphate pathway. This adaptive mechanism enhances cellular reductive capacity and supports anchorage-independent growth of tumour spheroids. Disabling this redox switch impairs tumour proliferation in vitro and in vivo, sensitising cells to chemo- and radiotherapy by exacerbating oxidative damage.

Investigations into long non-coding RNA taurine-upregulated gene 1 (TUG1) reveal its role in microglial activation via GAPDH-mediated glycolytic reprogramming. Silencing TUG1 shifts microglial metabolism from glycolysis towards oxidative phosphorylation, attenuating pro-inflammatory cytokine production. This metabolic shift underlines how lncRNAs coordinate GAPDH expression and localisation to influence the balance between inflammatory and reparative phenotypes in the central nervous system.

Glyceraldehyde-3-Phosphate Dehydrogenase Functions in Cellular Mechanisms publication trend

The graph below shows the total number of articles in glyceraldehyde-3-phosphate dehydrogenase functions in cellular mechanisms across all publications each year (not limited to Nature Index journals).

Technical terms

Glyceraldehyde-3-phosphate dehydrogenase (GAPDH): An enzyme of glycolysis also involved in redox sensing and non-metabolic cellular processes.

Redox switch: A reversible oxidation of an active-site cysteine that modulates GAPDH activity and metabolic flux.

S-Glutathionylation: A post-translational modification whereby glutathione binds to a cysteine residue, altering protein function.

Nuclear translocation: The active movement of GAPDH into the nucleus to influence transcription and DNA repair.

Pentose phosphate pathway: A metabolic route generating NADPH and pentose sugars, critical for antioxidant defence and biosynthesis.

References

1. The GAPDH redox switch safeguards reductive capacity and enables survival of stressed tumour cells. Nature Metabolism (2023).
2. LncRNA TUG1 mediates microglial inflammatory activation by regulating glucose metabolic reprogramming. Scientific Reports (2024).
3. The therapeutic effect of a novel GAPDH inhibitor in mouse model of breast cancer and efficacy monitoring by molecular imaging. Cancer Cell International (2024).
4. Origin of Elevated S-Glutathionylated GAPDH in Chronic Neurodegenerative Diseases. International Journal of Molecular Sciences (2023).
5. Monomethyl fumarate attenuates lung Ischemia/Reperfusion injury by disrupting the GAPDH/Siah1 signaling cascade. International Immunopharmacology (2024).
6. Glyceraldehyde-3-phosphate Dehydrogenase (GAPDH) Aggregation Causes Mitochondrial Dysfunction during Oxidative Stress-induced Cell Death*. Journal of Biological Chemistry (2017).