A cell cycle phosphoproteome of the yeast centrosome

Jamie M. Keck, Michele H. Jones, Catherine C.L. Wong, Jonathan Binkley, Daici Chen, Sue L. Jaspersen, Eric P. Holinger, Tao Xu, Mario Niepel, Michael P. Rout, Jackie Vogel, Arend Sidow, John R. Yates, Mark Winey

Research output: Contribution to journalArticlepeer-review

82 Scopus citations


Centrosomes organize the bipolar mitotic spindle, and centrosomal defects cause chromosome instability. Protein phosphorylation modulates centrosome function, and we provide a comprehensive map of phosphorylation on intact yeast centrosomes (18 proteins). Mass spectrometry was used to identify 297 phosphorylation sites on centrosomes from different cell cycle stages. We observed different modes of phosphoregulation via specific protein kinases, phosphorylation site clustering, and conserved phosphorylated residues. Mutating all eight cyclin-dependent kinase (Cdk)-directed sites within the core component, Spc42, resulted in lethality and reduced centrosomal assembly. Alternatively, mutation of one conserved Cdk site within g-tubulin (Tub4-S360D) caused mitotic delay and aberrant anaphase spindle elongation. Our work establishes the extent and complexity of this prominent posttranslational modification in centrosome biology and provides specific examples of phosphorylation control in centrosome function.

Original languageEnglish (US)
Pages (from-to)1557-1561
Number of pages5
Issue number6037
StatePublished - Jun 24 2011
Externally publishedYes

ASJC Scopus subject areas

  • General


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