Tubulin polymerization pathway

The "Tubulin polymerization pathway" is not a single molecular target but rather refers to the cellular process by which α-tubulin and β-tubulin heterodimers assemble into microtubules. This dynamic process is fundamental to eukaryotic cell biology and underlies essential functions such as mitosis, intracellular trafficking, maintenance of cell shape, and motility. The pathway involves the GTP-dependent addition of tubulin dimers at the growing ends of microtubules; GTP hydrolysis on β-tubulin regulates stability and dynamic instability. Therapeutic relevance: While "Tubulin polymerization pathway" itself is not a druggable target in the sense of being a receptor or enzyme, it is frequently referenced in pharmacology because many anticancer agents act by disrupting this process. Drugs such as paclitaxel (taxol), vinblastine, vincristine, colchicine, mebendazole, albendazole, and griseofulvin bind directly to tubulins or microtubules to inhibit their assembly/disassembly dynamics. These actions can arrest cell division or induce apoptosis in rapidly dividing cells. Mechanisms of action for drugs targeting this process include: - Inhibition of microtubule polymerization (e.g., vinca alkaloids like vinblastine/vincristine) - Stabilization/prevention of depolymerization (e.g., taxanes like paclitaxel) Summary judgment: The entry "Tubulin polymerization pathway" does not correspond to a canonical molecular target, but rather describes an essential cellular mechanism involving multiple proteins. For structured data purposes—such as those used in drug discovery databases—the correct targets are individual proteins like α-tubulin or β-tubulin subunits. If you need information about specific molecules within this pathway—such as "β-tubulin"—please specify so that detailed structured information can be provided for that entity.

Other names

Microtubule assemblyMicrotubule polymerizationTubulin dynamicsMicrotubule formation

Drugs act by inhibiting microtubule polymerization (e.g., vinca alkaloids like vinblastine/vincristine) or by stabilization/prevention of depolymerization (e.g., taxanes like paclitaxel).