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  • Articles  (8)
  • Chemical Engineering
  • Electronic structure and strongly correlated systems
  • Saccharomyces cerevisiae
  • Springer  (8)
  • 2000-2004
  • 1980-1984  (8)
  • 1980  (8)
Collection
  • Articles  (8)
Source
Keywords
Publisher
Years
  • 2000-2004
  • 1980-1984  (8)
Year
Topic
  • 1
    Electronic Resource
    Electronic Resource
    High frequency recombination and the expression of genes cloned on chimeric yeast plasmids: Identification of a fragment of 2-μm circle essential for transformation (1980)
    Springer
    Current genetics 2 (1980), S. 17-251 
    Details
    ISSN: 1432-0983
    Keywords: Gene cloning ; Saccharomyces cerevisiae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have carried out experiments aimed at explaining the observed variations in transformation frequencies when Saccharomyces cerevisiae or Saccharomyces carlbergensis are transformed with chimeric plasmids that contain one of 4 possible EcoRI fragments of the yeast 2-μm circle. These plasmids fall into 2 classes when used to transform 2 different yeast his3 auxotrophs, one (strain LL20) harbours indigenous 2-μm circle, and the other (strain YF233) is devoid of this plasmid. Hybrid plasmids containing either the 2.4 mega-dalton (mD) R-form EcoRI fragment (pYF88) or the l.4 mD L-form EcoRI fragment (pYF177) of 2-μm circle transform either of the two hosts at a high frequency (50,000 colonies per Mg in LL20 and 10,000 colonies per μg in YF233). Hybrid plasmids containing the 1.5 mD R-form EcoRI fragment (pYF87) or the 2.5 mD L-form EcoRI fragment (pYF178) of the 2-μm circle transform LL20 at a reduced frequency (6,000–16,000 colonies per μg) and YF233 at extremely low frequencies (1–5 colonies per μg). All plasmids retrieved from strain YF233 that had been transformed with pYF88 or pYF177 were identical to the original transforming plasmid. Of the plasmids retrieved from strain LL20 that had been transformed with pYF87 and pYF178, approximately half had acquired an extra copy of the 2-μm circle. Of the plasmids retrieved from strain LL20 that had been transformed with pYF88 and pYF177, an average of only approximately 13% had acquired an extra copy of 2-μm circle. Taken together, these observations indicate that the transformation of yeast by a plasmid lacking the ability to replicate (pYF87 and pYF1780) occurs by the recombinational acquisition of 1 copy of the host 2-μm circle, which serves to supply the incoming plasmid with missing essential sequences. A comparison of 2-μm circle DNA fragments carried by pYF88 and pYF177 indicates that the region of 2-μm circle required for high frequency transformation is a 1.2 mD segment that is common to the 2.4 mD R-form and 1.4 ml) L-form EcoRI fragments. This region extends from the EcoRI cut site adjacent to the PstI site, through to the end of the inverted repeat. However, the inverted repeat sequence alone is not sufficient to bestow high frequency transformation of yeast.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00445690
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  • 2
    Electronic Resource
    Electronic Resource
    A novel mutation that affects utilization of galactose in Saccharomyces cerevisiae (1980)
    Springer
    Current genetics 2 (1980), S. 115-120 
    Details
    ISSN: 1432-0983
    Keywords: Galactose fermentation ; Saccharomyces cerevisiae ; Regulatory mutant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A novel type of regulatory mutation for galactose metabolism in Saccharomyces cerevisiae is described. The mutation named gal11 was recessive, non-allelic to GAL4, GAL80, GAL2, or GAL3, and unlinked to the gene cluster of GAL1, GAL10, and GAL7. It caused a ‘coordinate’ reduction of galactokinase, galactose-1-P uridylyl transferase, and UDP-glucose 4-epimerase by a factor of more than 5, rendering the mutant cells galactose-nonfermenting. The effect of the mutation was manifested not only in cells grown on galactose but also in cells constitutively synthesizing the galactose-metabolizing enzymes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00420623
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  • 3
    Electronic Resource
    Electronic Resource
    Transcriptional units of GAL genes in Saccharomyces cerevisiae determined by ultraviolet light mapping (1980)
    Springer
    Current genetics 2 (1980), S. 223-228 
    Details
    ISSN: 1432-0983
    Keywords: Transcriptional Units ; GAL Genes ; Saccharomyces cerevisiae ; UV mapping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The size of the transcriptional unit of the structural genes for three galactose-metabolizing enzymes which form a cluster on chromosome II in Saccharomyces cerevisiae was studied by the ultraviolet light (UV)-mapping technique. Thus the size of the primary transcripts of GAL7 for galactose-1-phosphate uridylyl transferase, GAL10 for uridine diphosphoglucose 4-epimerase, or GAL1 for galactokinase were estimated to be 0.81 x 106, 1.1 x 106, or 1.3 x 106 respectively. In the light of these data together with the known directions of transcription of the genes, we concluded that each of three genes was transcribed from its own promoter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00435690
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  • 4
    Electronic Resource
    Electronic Resource
    The structural organization of the Tibi grain as revealed by light, scanning and transmission microscopy (1980)
    Springer
    Archives of microbiology 128 (1980), S. 157-161 
    Details
    ISSN: 1432-072X
    Keywords: Lactobacillus brevis ; Streptococcus lactis ; Saccharomyces cerevisiae ; Concanavalin A ; Symbiosis ; Tibi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Tibi grains consist of a unique and very stable symbiotic association of Lactobacillus brevis, Streptococcus lactis and Saccharomyces cerevisiae embedded in a dextran matrix. The structural organization of the grain was examined by light, scanning and transmission electron microscopy. The grain was constituted of an outer compact layer and an inner spongy structure. The outer layer was more densely populated by the microorganisms than the inner layer but dextran, stained on frozen thin sections with fluorescein-conjugated concanavalin A, was more abundant in the inner layer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406153
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  • 5
    Electronic Resource
    Electronic Resource
    The effect of sulfite on the yeast Saccharomyces cerevisiae (1980)
    Springer
    Archives of microbiology 125 (1980), S. 89-95 
    Details
    ISSN: 1432-072X
    Keywords: Sulfur dioxide ; Sulfite ; Air polluting substances ; Saccharomyces cerevisiae ; Active agent of irreversible cell inactivation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract After a short period of tolerance, living cells of Saccharomyces cerevisiae were irreversibly damaged by low concentrations of sulfite. The length of the period of tolerance and the rate of the damaging effect depended on the concentration on sulfite, pH-value, temperature, the physiological state of the cells, and incubation time. Inhibitors of protein synthesis and mitochondrial ATP synthesis did not alter the deleterious effect of sulfite on living cells. Furthermore, cell damage leading to inhibition of colony formation occured under aerobic as well as under anaerobic conditions. Prior to cell inactivation sulfite induced the formation of respiratory deficient cells. The active agent was shown to be SO2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00403203
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  • 6
    Electronic Resource
    Electronic Resource
    The use of phenylmethylsulfonyl fluoride in the study of catabolite inactivation and repression in intact cells of Saccharomyces cerevisiae (1980)
    Springer
    Archives of microbiology 124 (1980), S. 293-295 
    Details
    ISSN: 1432-072X
    Keywords: Saccharomyces cerevisiae ; Catabolite repression and inactivation ; Inhibition of protease B
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Catabolite inactivation of fructose-1,6-bisphosphatase, isocitrate lyase, phosphoenolpruvate carboxykinase and malate dehydrogenase in intact cells could be prevented by phenylmethylsulfonyl fluoride added 40 min prior to the addition of glucose. Protein synthesis, fermentative and respiratory activity and catabolite repression were not affected. Elimination of catabolite inactivation by the addition of PMSF revealed that catabolite repression started at different times for different enzyme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00427741
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of growth temperature upon heat sensitivity in Saccharomyces cerevisiae (1980)
    Springer
    Archives of microbiology 124 (1980), S. 285-287 
    Details
    ISSN: 1432-072X
    Keywords: Yeast ; Saccharomyces cerevisiae ; Heat killing ; Membrane damage ; Genetic damage ; Growth temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The resistance of exponentially growing yeast cells to killing by exposure to 52°C increased markedly as the growth temperature was increased. Identical killing curves were obtained for cells suspended in growth medium or in 0.9% saline. Cells resistant to killing at 52°C were quite sensitive to killing at slightly higher temperatures. These results suggest a primary role for membrane damage in the mechanism of heat killing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00427739
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of yeast extracts on higher plants (1980)
    Springer
    Plant and soil 57 (1980), S. 41-47 
    Details
    ISSN: 1573-5036
    Keywords: Amino acids ; Nucleic acid bases ; Saccharomyces cerevisiae ; Vitamins ; Yeast autolyzate ; Yield stimulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Effect of yeast autolyzate on the growth of vineless pea plant was investigated. The yield was increased remarkably when yeast autolyzate was added, as compared with the control area in which the plants received only mineral fertilizer solution. The yield stimulation was the highest where 0.1 ppm of the autolyzate was added, the yield increasing by more than 80%. The reason why the yields were lower in the areas where the amount of yeast autolyzate added was incrased to 1 ppm and to 10 ppm, was presumed to be due to the fact that the substances may have been absorbed, decomposed, and utilized by soil microorganisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02139640
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