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The ring saga: looking back at the discovery of γ-tubulin and γ-tubulin ring complexes

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For many years, two central, unanswered questions in cytoskeleton research were how microtubule assembly is nucleated and microtubule polarity established. The discoveries of γ-tubulin and γ-tubulin ring complexes were key… Click to show full abstract

For many years, two central, unanswered questions in cytoskeleton research were how microtubule assembly is nucleated and microtubule polarity established. The discoveries of γ-tubulin and γ-tubulin ring complexes were key advances that allowed these questions to be substantially answered. The discovery of γ-tubulin was the product of a genetic screen in Aspergillus nidulans for genes important for microtubule function. γ-Tubulin is a member of the tubulin superfamily of proteins, closely related to α- and β-tubulin but distinct from both. It is ubiquitous in eukaryotes, and in many organisms there are small families of γ-tubulin genes. γ-Tubulin and associated proteins form ring-like complexes that localize to microtubule-organizing centers (MTOCs) and play an important role in the nucleation of microtubule assembly from MTOCs and the establishment of microtubule polarity.

Keywords: tubulin ring; ring complexes; discovery tubulin; microtubule; tubulin; tubulin tubulin

Journal Title: Molecular Biology of the Cell
Year Published: 2022

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