Transcriptional responses of saccharomyces cerevisiae to shift from respiratory and respirofermentative to fully fermentative metabolism

Eija Rintala (Corresponding Author), Paula Jouhten, Mervi Toivari, Marilyn G. Wiebe, Hannu Maaheimo, Merja Penttilä, Laura Ruohonen

    Research output: Contribution to journalArticleScientificpeer-review

    22 Citations (Scopus)

    Abstract

    In industrial fermentations of Saccharomyces cerevisiae, transient changes in oxygen concentration commonly occur and it is important to understand the behavior of cells during these changes. Glucose-limited chemostat cultivations were used to study the time-dependent effect of sudden oxygen depletion on the transcriptome of S. cerevisiae cells initially in fully aerobic or oxygen-limited conditions. The overall responses to anaerobic conditions of cells initially in different conditions were very similar. Independent of initial culture conditions, transient downregulation of genes related to growth and cell proliferation, mitochondrial translation and protein import, and sulphate assimilation was seen. In addition, transient or permanent upregulation of genes related to protein degradation, and phosphate and amino acid uptake was observed in all cultures. However, only in the initially oxygen-limited cultures was a transient upregulation of genes related to fatty acid oxidation, peroxisomal biogenesis, oxidative phosphorylation, TCA cycle, response to oxidative stress, and pentose phosphate pathway observed. Furthermore, from the initially oxygen-limited conditions, a rapid response around the metabolites of upper glycolysis and the pentose phosphate pathway was seen, while from the initially fully aerobic conditions, a slower response around the pathways for utilization of respiratory carbon sources was observed.

    Original languageEnglish
    Pages (from-to)461-476
    JournalOMICS: A Journal of Integrative Biology
    Volume15
    Issue number7-8
    DOIs
    Publication statusPublished - 1 Jul 2011
    MoE publication typeA1 Journal article-refereed

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