Gene Hxt7
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Construção de linhagens de Saccharomyces cerevisiae recombinantes superexpressoras de transportadores de pentoses. / Construction of Saccharomyces cerevisiae recombinant strains overexpressing pentoses transporters.
A conversão da biomassa para produção de etanol celulósico só é viável se a fração hemicelulósica e celulósica for utilizada no processo industrial. Para obtenção de leveduras capazes de produzir etanol a partir de pentoses, a captação desses açúcares é muito estudada, sendo que diversos autores concluíram que a interiorização do substra
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/11/2010
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2. The HXT1 gene product of Saccharomyces cerevisiae is a new member of the family of hexose transporters.
Two novel genes affecting hexose transport in the yeast Saccharomyces cerevisiae have been identified. The gene HXT1 (hexose transport), isolated from plasmid pSC7, was sequenced and found to encode a hydrophobic protein which is highly homologous to the large family of sugar transporter proteins from eucaryotes and procaryotes. Multicopy expression of the H
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3. Growth and Glucose Repression Are Controlled by Glucose Transport in Saccharomyces cerevisiae Cells Containing Only One Glucose Transporter
A set of Saccharomyces cerevisiae strains with variable expression of only the high-affinity Hxt7 glucose transporter was constructed by partial deletion of the HXT7 promoter in vitro and integration of the gene at various copy numbers into the genome of an hxt1-7 gal2 deletion strain. The glucose transport capacity increased in strains with higher levels of
American Society for Microbiology.
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4. The mutation DGT1-1 decreases glucose transport and alleviates carbon catabolite repression in Saccharomyces cerevisiae.
Glucose in ethanol-glycerol mixtures inhibits growth of Saccharomyces cerevisiae mutants lacking phosphoglycerate mutase. A suppressor mutation that relieved glucose inhibition was isolated. This mutation, DGT1-1 (decreasing glucose transport), was dominant and produced pleiotropic effects even in an otherwise wild-type background. Growth of the DGT1-1 mutan
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5. Glucose sensing and signalling properties in Saccharomyces cerevisiae require the presence of at least two members of the glucose transporter family.
The kinetics of glucose transport in a number of different mutants of Saccharomyces cerevisiae with multiple deletions in the glucose transporter gene family were determined. The deletions led to differences in maximal rate and affinity for glucose uptake by the cells, dependent on the growth conditions. At the same time, there were changes in glucose repres
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6. Function and Regulation of Yeast Hexose Transporters
Glucose, the most abundant monosaccharide in nature, is the principal carbon and energy source for nearly all cells. The first, and rate-limiting, step of glucose metabolism is its transport across the plasma membrane. In cells of many organisms glucose ensures its own efficient metabolism by serving as an environmental stimulus that regulates the quantity,
American Society for Microbiology.
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7. Feedback Regulation of Glucose Transporter Gene Transcription in Kluyveromyces lactis by Glucose Uptake
In the respirofermentative yeast Kluyveromyces lactis, only a single genetic locus encodes glucose transporters that can support fermentative growth. This locus is polymorphic in wild-type isolates carrying either KHT1 and KHT2, two tandemly arranged HXT-like genes, or RAG1, a low-affinity transporter gene that arose by recombination between KHT1 and KHT2. H
American Society for Microbiology.
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8. Carbon Source-Dependent Phosphorylation of Hexokinase PII and Its Role in the Glucose-Signaling Response in Yeast
The HXK2 gene is required for a variety of regulatory effects leading to an adaptation for fermentative metabolism in Saccharomyces cerevisiae. However, the molecular basis of the specific role of Hxk2p in these effects is still unclear. One important feature in order to understand the physiological function of hexokinase PII is that it is a phosphoprotein,
American Society for Microbiology.