Proteome analysis of recombinant xylose-fermenting Saccharomyces cerevisiae

Research output: Contribution to journalArticle

Researchers

  • L Salusjärvi
  • Marjo Poutanen
  • Juha-Pekka Pitkänen
  • H Koivistoinen
  • Aristos Aristidou
  • Nisse Kalkkinen
  • Laura Ruohonen
  • Merja Penttilä

Research units

  • VTT Technical Research Centre of Finland
  • University of Helsinki

Abstract

Introduction of an active xylose utilization pathway into Saccharomyces cerevisiae, which does not naturally ferment pentose sugars, is likely to have a major impact on the overall cellular metabolism as the carbon introduced to the cells will now flow through the pentose phosphate pathway. The metabolic responses in the recombinant, xylose-fermenting S. cerevisiae were studied at the proteome level by comparative two-dimensional gel electrophoresis of cellular proteins within a pH range of 3-10. Glucose-limited chemostat cultivations and corresponding chemostat cultivations performed in media containing xylose as the major carbon source were compared. The cultivations were studied in aerobic and anaerobic metabolic steady states and in addition at time points 5, 30 and 60 min after the switch-off of oxygen supply. We identified 22 proteins having a significant abundance difference on xylose compared to glucose, and 12 proteins that responded to change from aerobic to anaerobic conditions on both carbon sources. On xylose in all conditions studied, major changes were seen in the abundance of alcohol dehydrogenase 2 (Adh2p), acetaldehyde dehydrogenases 4 and 6 (Ald4p and Ald6p), and DL-glycerol 3-phosphatase (Gpp1p). Our results give indications of altered metabolic fluxes especially in the acetate and glycerol pathways in cells growing on xylose compared to glucose. Copyright (C) 2003 John Wiley Sons, Ltd.

Details

Original languageEnglish
Pages (from-to)295-314
Number of pages20
JournalYeast
Volume20
Issue number4
Publication statusPublished - Mar 2003
MoE publication typeA1 Journal article-refereed

    Research areas

  • Saccharomyces cerevisiae, xylose, ethanol, proteome, proteomics, two-dimensional gel electrophoresis, pentose phosphate pathway, metabolic engineering, 2-DIMENSIONAL GEL-ELECTROPHORESIS, GLUCOSE-FRUCTOSE OXIDOREDUCTASE, PYRUVATE-DEHYDROGENASE BYPASS, MASS-SPECTROMETRY, GENE-EXPRESSION, ACETALDEHYDE DEHYDROGENASES, XYLITOL DEHYDROGENASE, CHEMOSTAT CULTURES, ZYMOMONAS-MOBILIS, ESCHERICHIA-COLI

ID: 2403865