Zinc starvation induces a stress response in Saccharomyces cerevisiae that is mediated by the Msn2p and Msn4p transcriptional activators

FEMS Yeast Res. 2009 Dec;9(8):1187-95. doi: 10.1111/j.1567-1364.2009.00557.x. Epub 2009 Jul 31.

Abstract

During the production of wine and beer, the yeast Saccharomyces cerevisiae can encounter an environment that is deficient in zinc, resulting in a 'sluggish' or a 'stuck' ferment. It has been shown that the Zap1p-transcription factor induces the expression of a regulon in response to zinc deficiency; however, it was evident that a separate regulon was also activated during zinc deficiency in a Zap1p-independent manner. This study discovered the Msn2p and Msn4p (Msn2/4p) transcriptional activator proteins to be an additional control mechanism inducing the stress response during zinc deficiency. Promoter sequence analysis identified the stress-response element (STRE) motif, recognized by Msn2/4p, and was significantly enriched in the promoters of genes induced by zinc deficiency. An investigation using genome-wide analyses revealed a distinct regulon consisting of STRE-containing genes whose zinc-responsive expression was abolished in an msn2 msn4 double mutant. An STRE-driven lacZ reporter construct confirmed that expression of the genes within this regulon was perturbed by the deletion of MSN2 and MSN4 and also implicated Hog1p as a contributing factor. This research provides a better understanding of the molecular mechanisms involved in the yeast response to zinc deficiency during fermentation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Binding Sites / genetics
  • DNA, Fungal / genetics
  • DNA-Binding Proteins / genetics
  • Gene Deletion
  • Gene Expression Regulation, Fungal*
  • Genes, Reporter
  • Promoter Regions, Genetic
  • Regulon
  • Saccharomyces cerevisiae / genetics
  • Saccharomyces cerevisiae / physiology*
  • Saccharomyces cerevisiae Proteins / genetics
  • Stress, Physiological*
  • Transcription Factors / genetics
  • Zinc / metabolism*
  • beta-Galactosidase / genetics
  • beta-Galactosidase / metabolism

Substances

  • DNA, Fungal
  • DNA-Binding Proteins
  • MSN2 protein, S cerevisiae
  • MSN4 protein, S cerevisiae
  • Saccharomyces cerevisiae Proteins
  • Transcription Factors
  • beta-Galactosidase
  • Zinc