Glucose Repression
Mostrando 1-12 de 828 artigos, teses e dissertações.
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1. Pectin lyase overproduction by Penicillium griseoroseum mutants resistant to catabolite repression
Abstract Expression of pectinolytic genes is regulated by catabolic repression limiting the production of pectin lyase (PL) if the natural inducer, pectin, is missing from the growth medium. Here, we report the isolation of Penicillium griseoroseum mutants resistant to 2-deoxy-d-glucose (DG) that show resistance to catabolite repression and overproduce PL. T
Braz. J. Microbiol.. Publicado em: 2017-07
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2. Yeast biomass production: a new approach in glucose-limited feeding strategy
The aim of this work was to implement experimentally a simple glucose-limited feeding strategy for yeast biomass production in a bubble column reactor based on a spreadsheet simulator suitable for industrial application. In biomass production process using Saccharomyces cerevisiae strains, one of the constraints is the strong tendency of these species to met
Braz. J. Microbiol.. Publicado em: 2013
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3. Envolvimento dos quatro genes bZIPs do Grupo C de Arabidopsis thaliana na sinalização por glicose, manose e ABA / Functional analysis of the Arabidopsis Group C bZIPs homologous to the maize Opaque-2 regulator
In the model eudicot organism A. thaliana (Arabidopsis), four genes encoding bZIP transcription regulatory factors that are homologous to the maize Opaque-2 (O2) locus were identified. O2 is a key regulator of the carbon to nitrogen balance and of the prolamine type storage proteins synthesis during seed development. The Arabidopsis genes, AtbZIP9, the two p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/02/2008
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4. Sinalização por carboidratos em cana-de-açucar e divergencia evolutiva / Sugar signaling in sugarcane and evolution diversification
Besides act as carbon primary source in the major types of cells, sugars produced by photosynthesis acquired important functions in the course of plant s evolution like controlling growth, development, and metabolism and acting in resistance to abiotic and biotic stresses like osmotic, energetic and response to pathogens. Sugars can be signals that active si
Publicado em: 2008
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5. Identificação, caracterização e análise da expressão de genes de resposta ao estresse oxidativo em Lactobacillus delbrueckii UFV H2b20 / Identification, characterization and expression analysis of oxidative stress response genes in Lactobacillus delbrueckii UFV H2b20
Oxidative stress is an important cause of viability loss in lactic acid bacteria used in food industry and as probiotics. This work aimed at identifying and characterize genes involved in the oxidative stress response in Lactobacillus delbrueckii UFV H2b20, a potencial probiotic strain. Therefore, dps, which encodes a ferritin-like protein, and pox, which en
Publicado em: 2008
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6. Regulation of the expression of the gene plg1 that code for pectin lyase in Penicillium griseoroseum / Regulação da expressão do gene plg1 que codifica pectina liase em Penicillium griseoroseum
Penicillium griseoroseum has been considered a promising species for industrial application because of its capacity to produce pectin lyase (PL) and polygalacturonase. When P. griseoroeum is grown in the presence of glucose, plg1 gene transcripts are detected at low levels, evidencing the effects of catabolic repression. However, in the absence of the natura
Publicado em: 2006
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7. Caracterização bioquímica das ß-glucosidases do Scytalidium thermophilum / Biochemical characterization of ß-glucosidases from Scytalidium thermophilum
Cellulose is the most abundant carbon source found in woods and waste residues. In nature the complete hidrolysis of cellulose occurs by the sinergistic action of several enzymes such endo-1,4-ß-D-glucanase, exo-1,4-ß-glucanase e ß-glucosidase or cellobiase. The present work describe some physiological and biochemical properties of ß-glucosidase system f
Publicado em: 2005
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8. The transcription factor Snf1p is involved in a Tup1p-independent manner in the glucose regulation of the major methanol metabolism genes of Hansenula polymorpha
Hansenula polymorpha is a methylotrophic yeast widely employed in biotechnology as a ''protein factory''. Most promoters used for heterologous protein expression, like MOX (methanol oxidase) and DAS (di-hydroxy acetone synthase), are involved in the peroxisomal methanol metabolism (C1 metabolism) and are under strong glucose repression. Interestingly, the MO
Genetics and Molecular Biology. Publicado em: 2003-12
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9. Impact of the reg1 mutation glycocen accumulation and glucose consumption rates in Saccharomyces cerevisiae cells based on a macrokinetic model
In S. cerevisiae, catabolite repression controls glycogen accumulation and glucose consumption. Glycogen is responsible for stress resistance, and its accumulation in derepression conditions results in a yeast with good quality. In yeast cells, catabolite repression also named glucose effect takes place at the transcriptional levels, decreasing enzyme respir
Brazilian Journal of Chemical Engineering. Publicado em: 2003-09
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10. Metabolic network analysis of Saccharomyces cerevisiae. / Análise de redes metabólicas em Saccharomyces cerevisiae.
Análise de Redes Metabólicas foi aplicada à cepa de Saccharomyces cerevisiae CEN.PK113-7D, e a alguns mutantes interrompidos em genes que codificam para proteínas regulatórias envolvidas no fenômeno de repressão por glicose. Todas as cepas foram cultivadas em aerobiose, em meio mínimo contendo [1-13C]glicose como substrato limitante. As células eram
Publicado em: 2001
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11. Produção de B-Galactosidade por Erwinia aroidae cultivada em soro de queijo
Production of intra and extracellular /3-galactosidase by Erwinia aroidea grown in cheese whey was studied. Preliminary experiments with edenrneyers and desproteinized cheese whey showed the optimallactose concentration of 5.5% when the lactase activity achieved 434.10 VI/ml and cellular dried mass 1.9048 g/l for 12 hours culture. Optimals temperature and pH
Publicado em: 1995
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12. Two types of glucose effects on beta-galactosidase synthesis in a membrane fraction of Escherichia coli: correlation with repression observed in intact cells.
A membrane fraction obtained from an osmotic lysate of Escherichia coli spheroplasts retains capability to synthesize beta-galactosidase. The system also retains cellular regulatory functions, one of which is known as catabolite repression. Two types of repression of beta-galactosidase synthesis were observed in this membrane system: one was caused by the ad