Xylose metabolism in Candida utilis
Ontology highlight
ABSTRACT:
ORGANISM(S): Cyberlindnera jadinii
SUBMITTER: Hideyuki Tamakawa
PROVIDER: E-GEOD-43514 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Similar Datasets
Project description:This SuperSeries is composed of the following subset Series: GSE24853: Expression analysis of Spathaspora passalidarum NRRL Y-27907 grown in glucose or xylose GSE24854: Expression analysis of Pichia stipitis CBS 6054 grown in glucose or xylose GSE24855: Expression analysis of Lodderomyces elongisporus NRRL YB-4239 grown in glucose or xylose GSE24856: Expression analysis of Candida tenuis NRRL Y-1498 grown in glucose or xylose GSE24857: Expression analysis of Candida albicans WO-1 grown in glucose or xylose Refer to individual Series
2011-10-19 | E-GEOD-24858 | biostudies-arrayexpress
Project description:Investigation of whole genome gene expression level changes in Pichia stipitis CBS 6054 grown aerobically in xylose, compared to the same strain grown aerobically in glucose. A six array study using total RNA recovered from three separate cultures of Pichia stipitis CBS 6054 grown in glucose and three separate cultures of Pichia stipitis CBS 6054 grown in xylose. Each array measures the expression level of 374,100 probes (average probe length 53.6 +/- 4.1 nt) tiled across the Pichia stipitis CBS 6054 genome with a median spacing distance of 33 nt. During data processing, probes are filtered to include only those probes corresponding to annotated protein-coding genes.
2011-10-19 | E-GEOD-24854 | biostudies-arrayexpress
Project description:The ascomycetes Saccharomyces cerevisiae, Candida albicans and Scheffersomyces stipitis metabolize the pentose sugar xylose very differently. S. cerevisiae fails to grow on xylose, while C. albicans can grow, and S. stipitis can both grow and ferment xylose to ethanol. However, all three species contain highly similar genes that encode xylose reductase and xylitol dehydrogenase required to convert xylose to xylulose, on which all three fungi grow. We have created C. albicans strains deleted for either or both the xylose reductase gene GRE3, and the xylitol dehydrogenase gene XYL2. As expected, all the mutant strains cannot grow on xylose, while the gre3 mutant can grow on xylitol. The gre3 and xyl2 mutants are complemented efficiently by the XYL1 and XYL2 from S. stipitis respectively. Intriguingly, the S. cerevisiae GRE3 and SOR1 genes can complement the gre3 and xyl2 mutants respectively, showing that S. cerevisiae contains the enzymatic capacity for converting xylose to xylulose. In addition, the gre3 xyl2 double mutant is effectively rescued by the xylose isomerase (XI) gene of either Piromyces or Orpinomyces, suggesting that the XI provides an alternative to the missing oxido-reductase functions in the mutant required for the xylose-xylulose conversion. Overall this work establishes that C. albicans strains engineered to lack essential steps for xylose metabolism provide a platform for the analysis of xylose metabolism enzymes from a variety of species, and confirms that S. cerevisiae has the genetic potential to convert xylose to xylulose, although non-engineered strains cannot proliferate on xylose as the sole carbon source. Transcription profile of cells in xylose compared to glucose. Two sets: Candida albicans, 1 condition ; Saccharomyces cerevisiae 2 conditions / in xylose (SX) or no sugar (S) (replicates with dye-swap)
2013-10-30 | E-GEOD-50476 | biostudies-arrayexpress
Project description:We previously reported that a recombinant Candida utilis strain expressing a Candida shehatae xylose reductase K275R/N277D, a C. shehatae xylitol dehydrogenase, and xylulokinase from Pichia stipitis produced ethanol from xylose. However, its productivity was low. In this study, metabolomic (CE-TOF MS) and transcriptomic (microarray) analyses were performed to characterize xylose metabolism by the engineered C. utilis and to identify key genetic changes contributing to efficient xylose utilization. Metabolomic analysis revealed that the xylose-fermenting strain accumulated more pentose phosphate pathway intermediates, more NADH, and more glycolytic intermediates upstream of glyceraldehyde 3-phosphate than wild-type. Transcriptomic analysis of the strain grown on xylose indicated a significant increase in expression of genes encoding tricarboxylic acid cycle enzymes, respiratory enzymes, and enzymes involved in ethanol oxidation. To decrease the NADH/NAD+ ratio and increase ethanol yield from the fermentation of xylose, ADH1 encoding NADH-dependent alcohol dehydrogenase was overexpressed. The resultant strain exhibited a 17% increase in ethanol production and a 22% decrease in xylitol accumulation relative to the control.
2014-01-01 | GSE43514 | GEO
Project description:Investigation of whole genome gene expression level changes in Candida albicans WO-1 grown aerobically in xylose, compared to the same strain grown aerobically in glucose. A six array study using total RNA recovered from three separate cultures of Candida albicans WO-1 grown in glucose and three separate cultures of Candida albicans WO-1 grown in xylose. Each array measures the expression level of 373,067 probes (average probe length 55.2 +/- 4.0 nt) tiled across the Candida albicans WO-1 genome with a median spacing distance of 31 nt. During data processing, probes are filtered to include only those probes corresponding to annotated protein-coding genes.
2011-10-19 | E-GEOD-24857 | biostudies-arrayexpress
Project description:Investigation of whole genome gene expression level changes in Candida tenuis NRRL Y-1498 grown aerobically in xylose, compared to the same strain grown aerobically in glucose. A six array study using total RNA recovered from three separate cultures of Candida tenuis NRRL Y-1498 grown in glucose and three separate cultures of Candida tenuis NRRL Y-1498 grown in xylose. Each array measures the expression level of 363,196 probes (average probe length 53.1 +/- 3.8 nt) tiled across the Candida tenuis NRRL Y-1498 genome with a median spacing distance of 24 nt. During data processing, probes are filtered to include only those probes corresponding to annotated protein-coding genes.
2011-10-19 | E-GEOD-24856 | biostudies-arrayexpress
Project description:The ascomycetes Saccharomyces cerevisiae, Candida albicans and Scheffersomyces stipitis metabolize the pentose sugar xylose very differently. S. cerevisiae fails to grow on xylose, while C. albicans can grow, and S. stipitis can both grow and ferment xylose to ethanol. However, all three species contain highly similar genes that encode xylose reductase and xylitol dehydrogenase required to convert xylose to xylulose, on which all three fungi grow. We have created C. albicans strains deleted for either or both the xylose reductase gene GRE3, and the xylitol dehydrogenase gene XYL2. As expected, all the mutant strains cannot grow on xylose, while the gre3 mutant can grow on xylitol. The gre3 and xyl2 mutants are complemented efficiently by the XYL1 and XYL2 from S. stipitis respectively. Intriguingly, the S. cerevisiae GRE3 and SOR1 genes can complement the gre3 and xyl2 mutants respectively, showing that S. cerevisiae contains the enzymatic capacity for converting xylose to xylulose. In addition, the gre3 xyl2 double mutant is effectively rescued by the xylose isomerase (XI) gene of either Piromyces or Orpinomyces, suggesting that the XI provides an alternative to the missing oxido-reductase functions in the mutant required for the xylose-xylulose conversion. Overall this work establishes that C. albicans strains engineered to lack essential steps for xylose metabolism provide a platform for the analysis of xylose metabolism enzymes from a variety of species, and confirms that S. cerevisiae has the genetic potential to convert xylose to xylulose, although non-engineered strains cannot proliferate on xylose as the sole carbon source.
2013-10-30 | GSE50476 | GEO
Project description:Liu2012 - Genome-scale metabolic network of Scheffersomyces stipitis (iTL885)
This model is described in the article:
A constraint-based model of
Scheffersomyces stipitis for improved ethanol production.
Liu T, Zou W, Liu L, Chen J.
Biotechnol Biofuels 2012; 5(1):
72
Abstract:
UNLABELLED: BACKGROUND: As one of the best xylose
utilization microorganisms, Scheffersomyces stipitis exhibits
great potential for the efficient lignocellulosic biomass
fermentation. Therefore, a comprehensive understanding of its
unique physiological and metabolic characteristics is required
to further improve its performance on cellulosic ethanol
production. RESULTS: A constraint-based genome-scale metabolic
model for S. stipitis CBS 6054 was developed on the basis of
its genomic, transcriptomic and literature information. The
model iTL885 consists of 885 genes, 870 metabolites, and 1240
reactions. During the reconstruction process, 36 putative sugar
transporters were reannotated and the metabolisms of 7 sugars
were illuminated. Essentiality study was conducted to predict
essential genes on different growth media. Key factors
affecting cell growth and ethanol formation were investigated
by the use of constraint-based analysis. Furthermore, the
uptake systems and metabolic routes of xylose were elucidated,
and the optimization strategies for the overproduction of
ethanol were proposed from both genetic and environmental
perspectives. CONCLUSIONS: Systems biology modelling has proven
to be a powerful tool for targeting metabolic changes. Thus,
this systematic investigation of the metabolism of S. stipitis
could be used as a starting point for future experiment designs
aimed at identifying the metabolic bottlenecks of this
important yeast.
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MODEL1507180026.
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2015-07-30 | MODEL1507180026 | BioModels
Project description:Investigation of whole genome gene expression level changes in Spathaspora passalidarum NRRL Y-27907 grown aerobically in xylose, compared to the same strain grown aerobically in glucose. A six array study using total RNA recovered from three separate cultures of Spathaspora passalidarum NRRL Y-27907 grown in glucose and three separate cultures of Spathaspora passalidarum NRRL Y-27907 grown in xylose. Each array measures the expression level of 362,487 probes (average probe length 54.5 +/- 4.0 nt) tiled across the Spathaspora passalidarum NRRL Y-27907 genome with a median spacing distance of 29 nt. During data processing, probes are filtered to include only those probes corresponding to annotated protein-coding genes.
2011-10-19 | E-GEOD-24853 | biostudies-arrayexpress
Project description:Investigation of whole genome gene expression level changes in Lodderomyces elongisporus NRRL YB-4239 grown aerobically in xylose, compared to the same strain grown aerobically in glucose. A six array study using total RNA recovered from three separate cultures of Lodderomyces elongisporus NRRL YB-4239 grown in glucose and three separate cultures of Lodderomyces elongisporus NRRL YB-4239 grown in xylose. Each array measures the expression level of 371,451 probes (average probe length 54.1 +/- 4.1 nt) tiled across the Lodderomyces elongisporus NRRL YB-4239 genome with a median spacing distance of 33 nt. During data processing, probes are filtered to include only those probes corresponding to annotated protein-coding genes.
2011-10-19 | E-GEOD-24855 | biostudies-arrayexpress