Proteins that physically interact with the phosphatase Cdc14 in Candida albicans have diverse roles in the cell cycle

Sci Rep. 2019 Apr 18;9(1):6258. doi: 10.1038/s41598-019-42530-1.

Abstract

The chromosome complement of the human fungal pathogen Candida albicans is unusually unstable, suggesting that the process of nuclear division is error prone. The Cdc14 phosphatase plays a key role in organising the intricate choreography of mitosis and cell division. In order to understand the role of Cdc14 in C. albicans we used quantitative proteomics to identify proteins that physically interact with Cdc14. To distinguish genuine Cdc14-interactors from proteins that bound non-specifically to the affinity matrix, we used a substrate trapping mutant combined with mass spectrometry analysis using Stable Isotope Labelling with Amino Acids in Cell Culture (SILAC). The results identified 126 proteins that interact with Cdc14 of which 80% have not previously been identified as Cdc14 interactors in C. albicans or S. cerevisiae. In this set, 55 proteins are known from previous research in S. cerevisiae and S. pombe to play roles in the cell cycle, regulating the attachment of the mitotic spindle to kinetochores, mitotic exit, cytokinesis, licensing of DNA replication by re-activating pre-replication complexes, and DNA repair. Five Cdc14-interacting proteins with previously unknown functions localised to the Spindle Pole Bodies (SPBs). Thus, we have greatly increased the number of proteins that physically interact with Cdc14 in C. albicans.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • CDC2 Protein Kinase / metabolism
  • Candida albicans / cytology*
  • Candida albicans / metabolism
  • Cell Cycle
  • Cell Cycle Proteins / metabolism
  • Fungal Proteins / genetics
  • Fungal Proteins / metabolism*
  • Isotope Labeling
  • Mass Spectrometry
  • Mutation
  • Phosphoprotein Phosphatases / genetics
  • Phosphoprotein Phosphatases / metabolism*
  • Protein Interaction Maps / physiology
  • Protein Tyrosine Phosphatases / metabolism
  • Saccharomyces cerevisiae Proteins / metabolism
  • Schizosaccharomyces pombe Proteins / metabolism

Substances

  • CDC14 protein, S cerevisiae
  • Cell Cycle Proteins
  • Fungal Proteins
  • Saccharomyces cerevisiae Proteins
  • Schizosaccharomyces pombe Proteins
  • CDC2 Protein Kinase
  • CDC14 protein, S pombe
  • Phosphoprotein Phosphatases
  • Protein Tyrosine Phosphatases