Gosset Alpha-tubulin Overview
Alpha-tubulin is a globular protein that forms heterodimers with beta-tubulin, together assembling into microtubules—key components of the eukaryotic cytoskeleton that provide structural support, facilitate intracellular transport, and are essential for mitosis, neuronal migration, and the function of cilia and flagella[1][3][4][5][6][8]. Microtubule-targeting drugs, which bind to tubulin (including alpha-tubulin), are widely used as anticancer agents because they perturb the highly dynamic nature of microtubule assembly and disassembly required for cell division[3][5][6]. Mutations and altered expression of alpha-tubulin are implicated in a range of diseases, from cancer (due to effects on mitosis and drug resistance) to neurodevelopmental and neurodegenerative disorders (such as lissencephaly) due to abnormal neuronal migration and microtubule function[1][5]. Post-translational modifications of alpha-tubulin, including acetylation, are relevant for specialized cellular and disease-specific processes[4][5].
Mechanism of Action
Microtubule stabilization (e.g., by paclitaxel), Microtubule depolymerization inhibition (e.g., by colchicine/vinca alkaloids)
Biological Functions
Disease Associations
Safety Considerations
- Neurotoxicity
- Drug resistance in cancer (due to tubulin mutations)
- Myelosuppression (from antitubulin drugs)
- Effects on rapidly dividing non-cancerous cells
- Peripheral neuropathy
Interacting Drugs
Associated Biomarkers
| Biomarker |
|---|
| Tubulin isotype expression (as a marker for drug response in cancer) |
| Acetylated alpha-tubulin (for some cilia and axoneme functions) |