Microtubule nucleation is regulated by the γ-tubulin small complex (γTuSC) and the γ-tubulin ring complex (γTuRC). Recent structural work, including the crystallographic analysis of γ-tubulin complex protein 4 (GCP4), provides new insights into the mechanism of γTuRC-based microtubule nucleation, confirming the hypothesis that the γTuRC functions as a microtubule template.
- Justin M. Kollman
- Andreas Merdes
- David A. Agard