Dual role of starvation signaling in promoting growth and recovery

PLoS Biol. 2017 Dec 13;15(12):e2002039. doi: 10.1371/journal.pbio.2002039. eCollection 2017 Dec.

Abstract

Growing cells are subject to cycles of nutrient depletion and repletion. A shortage of nutrients activates a starvation program that promotes growth in limiting conditions. To examine whether nutrient-deprived cells prepare also for their subsequent recovery, we followed the transcription program activated in budding yeast transferred to low-phosphate media and defined its contribution to cell growth during phosphate limitation and upon recovery. An initial transcription wave was induced by moderate phosphate depletion that did not affect cell growth. A second transcription wave followed when phosphate became growth limiting. The starvation program contributed to growth only in the second, growth-limiting phase. Notably, the early response, activated at moderate depletion, promoted recovery from starvation by increasing phosphate influx upon transfer to rich medium. Our results suggest that cells subject to nutrient depletion prepare not only for growth in the limiting conditions but also for their predicted recovery once nutrients are replenished.

MeSH terms

  • Cell Enlargement*
  • Culture Media
  • DNA-Binding Proteins / genetics
  • DNA-Binding Proteins / metabolism
  • Gene Expression Regulation, Fungal
  • Phosphates / metabolism*
  • Proton-Phosphate Symporters / genetics
  • Proton-Phosphate Symporters / metabolism
  • Saccharomyces cerevisiae Proteins / genetics
  • Saccharomyces cerevisiae Proteins / metabolism
  • Saccharomycetales

Substances

  • Culture Media
  • DNA-Binding Proteins
  • PHO4 protein, S cerevisiae
  • PHO84 protein, S cerevisiae
  • Phosphates
  • Proton-Phosphate Symporters
  • Saccharomyces cerevisiae Proteins

Grants and funding

European Research Council https://erc.europa.eu/ (grant number 338660). Received by NB. The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Israel Science Foundation http://www.isf.org.il/#/ (grant number 1738/15). Received by NB. The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.