Project description:we aimed to screen candidate kinase genes under the stress of phenolic aldehydes during ethanol fermentation for Zymomonas mobilis ZM4
Project description:Strain breeding is important for the efficient bioethanol fermentability. Here, it presented adaptive laboratory evolution with furan aldehydes contributed to the facilitated ethanol fermentability for Zymomomnas mobili. Genetic change was generated from adaptive laboratory evolution by genome resequencing assays. The key mutation would provide a robust strain biocatalyst for the production of biofuels and biochemicals.
Project description:To investigate the molecular mechanism of the increased bioethanol fermentability, we carried out RNA-Seq sequencing assays for the wild and mutant strain Z. mobilis after pretreated with cold plasma. We then performed gene expression profiling analysis using data obtained from RNA-seq of 2 different cells at one time points.
Project description:Thermotolerance development of robust Saccharomyces cerevisiae is necessary to enhance enzyme activity of cellulase, lower cooling costs, and reduce cell harm from the bad-distributed heat transfer in large-scale fermentation. The process-based studies of adaptive evolution have been well documented, but it remains unknown for the underlying molecular mechanism of the improved thermotolerance and the facilitated ethanol fermentability derived from adaptive evolution. Here, a robust thermotolerant S. cerevisiae Z100 was obtained with significantly improved ethanol fermentability under the stress of high temperature (50 oC) after 91 days’ adaptive evolution. RNA sequencing showed that adaptive evolution and its derived thermotolerance contributed to the unique gene transcriptional landscapes of the evolved strain. An interesting phenomenon was that the gene transcriptional signals of carbon metabolism were strengthened not at 50 oC but at 30 oC in S. cerevisiae Z100, and thus suggested that the improved thermotolerance led to the enhanced ethanol fermentability at 30 oC. The deeply repressed gene transcriptional expression indicated ribosome would be another key thermotolerant mechanism for the evolved strain. This study would provide a robust thermotolerant S. cerevisiae for bioethanol production and an important clue for future synthetic biology to thermotolerance engineering of fermentation strains.
Project description:Widiastuti2010 - Genome-scale metabolic
network Zymomonas mobilis (iZM363)
This model is described in the article:
Genome-scale modeling and in
silico analysis of ethanologenic bacteria Zymomonas
mobilis.
Widiastuti H, Kim JY, Selvarasu S,
Karimi IA, Kim H, Seo JS, Lee DY.
Biotechnol. Bioeng. 2011 Mar; 108(3):
655-665
Abstract:
Bioethanol has been recognized as a potential alternative
energy source. Among various ethanol-producing microbes,
Zymomonas mobilis has acquired special attention due to its
higher ethanol yield and tolerance. However, cellular
metabolism in Z. mobilis remains unclear, hindering its
practical application for bioethanol production. To elucidate
such physiological characteristics, we reconstructed and
validated a genome-scale metabolic network (iZM363) of Z.
mobilis ATCC31821 (ZM4) based on its annotated genome and
biochemical information. The phenotypic behaviors and metabolic
states predicted by our genome-scale model were highly
consistent with the experimental observations of Z. mobilis ZM4
strain growing on glucose as well as NMR-measured intracellular
fluxes of an engineered strain utilizing glucose, fructose, and
xylose. Subsequent comparative analysis with Escherichia coli
and Saccharomyces cerevisiae as well as gene essentiality and
flux coupling analyses have also confirmed the functional role
of pdc and adh genes in the ethanologenic activity of Z.
mobilis, thus leading to better understanding of this natural
ethanol producer. In future, the current model could be
employed to identify potential cell engineering targets,
thereby enhancing the productivity of ethanol in Z.
mobilis.
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MODEL1507180057.
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Project description:Investigation of the expression profiling of the ethanologenic Zymomonas mobilis in response to ethanol stress. A six chip study using total RNA recovered from three separate wild-type cultures of Zymomonas mobilis ATCC31821 and three separate cultures of a triple treated with 5% ethanol. Each chip measures the expression level of 1800 genes from Zymomonas mobilis ATCC31821 and the associated plasmids, with three-fold technical redundancy.
Project description:Investigation of the expression profiling of the ethanologenic Zymomonas mobilis in response to furfural stress. A six chip study using total RNA recovered from three separate wild-type cultures of Zymomonas mobilis ATCC31821 and three separate cultures of a triple treated with 1.0 g/l furfural. Each chip measures the expression level of 1800 genes from Zymomonas mobilis ATCC31821 and the associated plasmids, with three-fold technical redundancy.
Project description:Deletion of the IscR homolog ZMO_0422 was performed in Zymomonas mobilis to investigate the role of Fe-S cluster biogenesis in Zymomonas. Here we perform genome-wide transcirptomics study to examine transcript chagnes in delta-ZMO_0422 compared to WT Zymomonas mobilis under both aerobic and anaerobic growth conditions.
2025-11-20 | GSE304389 | GEO
Project description:Cold plasma facilitates aldehyde inhibitors tolerance and bioethano fermentability for Zymomonas mobilis