Quantitative analysis of protein interaction network dynamics in yeast

Mol Syst Biol. 2017 Jul 13;13(7):934. doi: 10.15252/msb.20177532.


Many cellular functions are mediated by protein-protein interaction networks, which are environment dependent. However, systematic measurement of interactions in diverse environments is required to better understand the relative importance of different mechanisms underlying network dynamics. To investigate environment-dependent protein complex dynamics, we used a DNA-barcode-based multiplexed protein interaction assay in Saccharomyces cerevisiae to measure in vivo abundance of 1,379 binary protein complexes under 14 environments. Many binary complexes (55%) were environment dependent, especially those involving transmembrane transporters. We observed many concerted changes around highly connected proteins, and overall network dynamics suggested that "concerted" protein-centered changes are prevalent. Under a diauxic shift in carbon source from glucose to ethanol, a mass-action-based model using relative mRNA levels explained an estimated 47% of the observed variance in binary complex abundance and predicted the direction of concerted binary complex changes with 88% accuracy. Thus, we provide a resource of yeast protein interaction measurements across diverse environments and illustrate the value of this resource in revealing mechanisms of network dynamics.

Keywords: environmental response; mRNA expression; network dynamics; protein complementation assay; protein–protein interactions.

MeSH terms

  • Computer Simulation
  • DNA Barcoding, Taxonomic
  • Gene Expression Profiling
  • Models, Biological
  • Peptide Hydrolases / chemistry
  • Peptide Hydrolases / genetics
  • Peptide Hydrolases / metabolism
  • Protein Interaction Mapping / methods
  • Protein Interaction Maps*
  • RNA, Fungal / genetics
  • RNA, Fungal / metabolism
  • RNA, Messenger / genetics
  • RNA, Messenger / metabolism
  • Saccharomyces cerevisiae / genetics
  • Saccharomyces cerevisiae / metabolism
  • Saccharomyces cerevisiae Proteins / chemistry
  • Saccharomyces cerevisiae Proteins / genetics
  • Saccharomyces cerevisiae Proteins / metabolism*
  • Systems Biology


  • RNA, Fungal
  • RNA, Messenger
  • Saccharomyces cerevisiae Proteins
  • Peptide Hydrolases
  • Rbd2 protein, S cerevisiae