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PLoS Biol. 2009 Jun 16;7(6):e1000134. doi: 10.1371/journal.pbio.1000134. Epub 2009 Jun 23.

Evolution of phosphoregulation: comparison of phosphorylation patterns across yeast species.

Author information

  • 1Department of Cellular and Molecular Pharmacology, University of California San Francisco, San Francisco, California, United States of America. pedro.beltrao@ucsf.edu

Erratum in

  • PLoS Biol. 2009 Nov;7(11). doi: 10.1371/annotation/66479889-5e57-4213-bf25-c4e8cf3d933b.

Abstract

The extent by which different cellular components generate phenotypic diversity is an ongoing debate in evolutionary biology that is yet to be addressed by quantitative comparative studies. We conducted an in vivo mass-spectrometry study of the phosphoproteomes of three yeast species (Saccharomyces cerevisiae, Candida albicans, and Schizosaccharomyces pombe) in order to quantify the evolutionary rate of change of phosphorylation. We estimate that kinase-substrate interactions change, at most, two orders of magnitude more slowly than transcription factor (TF)-promoter interactions. Our computational analysis linking kinases to putative substrates recapitulates known phosphoregulation events and provides putative evolutionary histories for the kinase regulation of protein complexes across 11 yeast species. To validate these trends, we used the E-MAP approach to analyze over 2,000 quantitative genetic interactions in S. cerevisiae and Sc. pombe, which demonstrated that protein kinases, and to a greater extent TFs, show lower than average conservation of genetic interactions. We propose therefore that protein kinases are an important source of phenotypic diversity.

PMID:
19547744
PMCID:
PMC2691599
DOI:
10.1371/journal.pbio.1000134
[PubMed - indexed for MEDLINE]
Free PMC Article
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