Proteomics

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Crosslinking mass spectrometry analysis of ?TuRC complex


ABSTRACT: The ?-tubulin ring complex (?TuRC) is the major microtubule nucleator in cells. The mechanism of its regulation is not understood. To understand the molecular basis of microtubule nucleation, we investigate the structure of ?TuRC using crosslinking mass spectrometry.

INSTRUMENT(S): Orbitrap Fusion Lumos

ORGANISM(S): Homo Sapiens (human)

SUBMITTER: Zhuo Chen  

LAB HEAD: Juri Rappsilber

PROVIDER: PXD018106 | Pride | 2021-01-27

REPOSITORIES: Pride

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Publications


The γ-tubulin ring complex (γTuRC) is the major microtubule nucleator in cells. The mechanism of its regulation is not understood. We purified human γTuRC and measured its nucleation properties in a total internal reflection fluorescence (TIRF) microscopy-based real-time nucleation assay. We find that γTuRC stably caps the minus ends of microtubules that it nucleates stochastically. Nucleation is inefficient compared with microtubule elongation. The 4 Å resolution cryoelectron microscopy (cryo-E  ...[more]

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