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  • Saccharomyces cerevisiae  (734)
  • Springer  (734)
  • American Chemical Society (ACS)
  • 1
    Electronic Resource
    Electronic Resource
    Actin-, myosin- and ubiquitin-dependent endocytosis (1996)
    Springer
    Cellular and molecular life sciences 52 (1996), S. 1033-1041 
    Details
    ISSN: 1420-9071
    Keywords: Ubiquitin ; yeast ; Saccharomyces cerevisiae ; Dictyostelium discoideum ; cytoskeleton ; mutants ; endocytosis ; actin ; myosin ; calmodulin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Endocytosis is a general term that is used to describe the internalization of external and plasma membrane molecules into the cell interior. In fact, several different mechanisms exist for the internalization step of this process. In this review we emphasize the work on the actin-dependent pathways, in particular in the yeastSaccharomyces cerevisiae, because several components of the molecular machinery are identified. In this yeast, the analysis of endocytosis in various mutants reveals a requirement for actin, calmodulin, a type I myosin, as well as a number of other proteins that affect actin dynamics. Some of these proteins have homology to proteins in animal cells that are believed to be involved in endocytosis. In addition, the demonstration that ubiquitination of some cell surface molecules is required for their efficient internalization is described. We compare the actin, myosin and ubiquitin requirements for endocytosis with recent results found studying these processes usingDictyostelium discoideum and animal cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01952099
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  • 2
    Electronic Resource
    Electronic Resource
    Translational control of endogenous and recoded nuclear genes in yeast mitochondria: Regulation and membrane targeting (1996)
    Springer
    Cellular and molecular life sciences 52 (1996), S. 1130-1135 
    Details
    ISSN: 1420-9071
    Keywords: Saccharomyces cerevisiae ; mitochondria ; mRNA-specific translational activation ; synthetic genes ; gene regulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Mitochondrial gene expression in yeast,Saccharomyces cerevisiae, depends on translational activation of individual mRNAs by distinct proteins encoded in the nucleus. These nuclearly coded mRNA-specific translational activators are bound to the inner membrane and function to mediate the interaction between mRNAs and mitochondrial ribosomes. This complex system, found to date only in organelles, appears to be an adaptation for targeting the synthesis of mitochondrially coded integral membrane proteins to the membrane. In addition, mRNA-specific translational activation is a rate-limiting step used to modulate expression of at least one mitochondrial gene in response to environmental conditions. Direct study of mitochondrial gene regulation and the targeting of mitochondrially coded proteins in vivo will now be possible using synthetic genes inserted into mtDNA that encode soluble reporter/passenger proteins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01952112
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  • 3
    Electronic Resource
    Electronic Resource
    Genetic analysis of clathrin function in yeast (1990)
    Springer
    The journal of membrane biology 116 (1990), S. 93-105 
    Details
    ISSN: 1432-1424
    Keywords: clathrin ; genetics ; Saccharomyces cerevisiae ; exocytosis ; endocytosis ; prohormone maturation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01868668
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  • 4
    Electronic Resource
    Electronic Resource
    Gating behaviors of a voltage-dependent and Ca2+-activated cation channel of yeast vacuolar membrane incorporated into planar lipid bilayer (1988)
    Springer
    The journal of membrane biology 106 (1988), S. 47-55 
    Details
    ISSN: 1432-1424
    Keywords: vacuole ; lipid bilayer ; K-channel ; single channel ; DIDS ; yeast ; Saccharomyces cerevisiae ; Ca2+ activation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary A voltage-dependent and Ca2+-activated cation channel found in the vacuolar membrane of the yeast,Saccharomyces cerevisiae, was incorporated into planar lipid bilayer and its gating characteristics were studied at the macroscopic and single-channel levels. The open-channel probability at steady state, which was estimated by the macroscopic current measurement, gave a maximum value at −10 mV and decreased in a graded fashion as the voltage became more positive or more negative. The steady-state voltage dependence was explained by assuming two independent gates, which had different rate constants and opposite voltage dependence. The fast-responding gate opened when the voltage of thecis side (the side to which the vesicles were added) was made more negative and the slow-responding gate behaved in the opposite direction. Relatively high concentrations of Ca2+, about 1mm, were required on thecis side for opening the slow gate in a voltage-dependent manner. DIDS increased the open-channel probability of the fast gate when added to thecis side, but was ineffective on the slow gate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01871766
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  • 5
    Electronic Resource
    Electronic Resource
    Interaction of ethidium bromide with yeast cells investigated by electron probe X-ray microanalysis (1983)
    Springer
    The journal of membrane biology 73 (1983), S. 131-136 
    Details
    ISSN: 1432-1424
    Keywords: electron probe X-ray microanalysis ; Saccharomyces cerevisiae ; ethidium ; brontophenol blue ; cationic dye ; cytolysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary K+ efflux provoked by ethidium proceeds partially as an all-or-none effect by which the diffusion barrier for K+ is disrupted and partially from still intact cells, presumably by exchange against ethidium. This is shown by the application of an electron probe microanalysis X-ray technique by which the K+ content of a number of individual cells is analyzed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01870436
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  • 6
    Electronic Resource
    Electronic Resource
    Chimeric evolution of the 2-μm genome in Saccharomyces cerevisiae (1994)
    Springer
    Journal of molecular evolution 38 (1994), S. 363-368 
    Details
    ISSN: 1432-1432
    Keywords: Saccharomyces cerevisiae ; 2-μm circle ; DNA sequencing ; Horizontal transmission ; Site-specific recombination ; Selfish DNA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We compared the nucleotide substitution pattern over the entire genome of two unique variants of the 6,300-bp selfish DNA (2 μm) plasmid in Saccharomyces cerevisiae. The DNA sequence of the left-unique region is identical among 2-μm variants, while the right-unique region shows substantial divergence. This chimeric pattern cannot be explained by neutral or Darwinian selection models. We propose that horizontal transmission of the 2-μm plasmid coupled with a directed, polarized gene conversion maintains the DNA sequence of the left-unique region, whereas the right-unique region is subject to random drift and Darwinian selection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00163153
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  • 7
    Electronic Resource
    Electronic Resource
    Phylogenetic analysis of the thiolase family. Implications for the evolutionary origin of peroxisomes (1992)
    Springer
    Journal of molecular evolution 35 (1992), S. 147-155 
    Details
    ISSN: 1432-1432
    Keywords: Thiolase ; Peroxisome evolution ; Bootstrap analysis ; Saccharomyces cerevisiae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The thiolase family is a widespread group of proteins present in prokaryotes and three cellular compartments of eukaryotes. This fact makes this family interesting in order to study the evolutionary process of eukaryotes. Using the sequence of peroxisomal thiolase from Saccharomyces cerevisiae recently obtained by us and the other known thiolase sequences, a phylogenetic analysis has been carried out. It shows that all these proteins derived from a primitive enzyme, present in the common ancestor of eubacteria and eukaryotes, which evolved into different specialized thiolases confined to various cell compartments. The evolutionary tree obtained is compatible with the endosymbiotic theory for the origin of peroxisomes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00183226
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  • 8
    Electronic Resource
    Electronic Resource
    Broad antifungal activity of β-isoxazolinonyl-alanine, a non-protein amino acid from roots of pea (Pisum sativum L.) seedlings (1991)
    Springer
    Biology and fertility of soils 11 (1991), S. 203-209 
    Details
    ISSN: 1432-0789
    Keywords: Antifungal activity ; Saccharomyces cerevisiae ; Phytopathogenic fungi ; Heterocyclic non-protein amino acid ; Pisum sativum ; Constitutive plant defence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary β-(Isoxazolin-5-on-2-yl)-alanine (βIA), a heterocyclic non-protein amino acid from root extracts and root exudates of pea seedlings, acts as a potent growth inhibitor of several eukaryotic organisms, including yeasts, phytopathogenic fungi, unicellular green algae, and higher plants. The antibiotic effect on baker's yeast was reversed by l-methionine, l-cysteine, and l-homocysteine. Phytopathogenic fungi such as Botrytis cinerea, Pythium ultimum, and Rhizoctonia solani grown on agar containing βIA were inhibited in the growth of mycelia or in the production of sclerotia. In contrast, no significant inhibition of either Gram-positive or Gram-negative bacteria was observed. Rhizobium leguminosarum, the compatible microsymbiont of Pisum spp., and Rhizobium meliloti were able to tolerate up to 2.9 mM βIA (500 ppm) without any effect on the growth rate. Bradyrhizobium japonicum even gave a positive chemotactic response to βIA. The ecological significance of βIA as a preformed plant protectant during the seedling stage of Pisum spp. and other βIA-containing legumes is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335768
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  • 9
    Electronic Resource
    Electronic Resource
    Free tryptophan pool and tryptophan biosynthetic enzymes in Saccharomyces cerevisiae (1976)
    Springer
    Archives of microbiology 107 (1976), S. 207-214 
    Details
    ISSN: 1432-072X
    Keywords: Anthranilate synthase ; Cell permeabilisation ; Indoleglycerolphosphate synthase ; Saccharomyces cerevisiae ; Tryptophan biosynthetic enzymes ; Tryptophan pool
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The free tryptophan pool and the levels of two enzymes of tryptophan biosynthesis (anthranilate synthase and indoleglycerolphosphate synthase) have been determined in a wild type strain of Saccharomyces cerevisiae and in mutants with altered regulatory properties. The tryptophan pool of wild type cells growing in minimal medium is 0.07 μmole per g dry weight. Addition of anthranilate, indole or tryptophan to the medium produces a fifteen- to forty-fold increase in tryptophan pool, but causes no repression of the biosynthetic enzymes. Inclusion of 5-methyltryptophan in the growth medium causes a reduction in growth rate and a derepression of the biosynthetic enzymes, and this is shown here not to be correlated with a decrease in the free tryptophan pool. Mutants with an altered anthranilate synthase showing decreased sensitivity to inhibition by l-tryptophan or by the analogue dl-5-methyltryptophan have a tryptophan pool far higher than the wild type strain, but no repression of indoleglycerolphosphate synthase was observed. Mutants with an anthranilate synthase more sensitive to tryptophan inhibition show a slightly reduced tryptophan pool, but no derepression of indoleglycerolphosphate synthase was found. A mutant with constitutively derepressed levels of the biosynthetic enzymes shows a considerably increased tryptophan pool. Addition of 5-methyltryptophan to the growth medium of non-derepressible mutants causes a decrease in growth rate accompanied by a decrease in the tryptophan pool.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00446842
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  • 10
    Electronic Resource
    Electronic Resource
    Promotion of sporulation by caffeine pretreatment in Saccharomyces cerevisiae (1976)
    Springer
    Archives of microbiology 108 (1976), S. 149-152 
    Details
    ISSN: 1432-072X
    Keywords: Saccharomyces cerevisiae ; Sporulation ; Ribonuclease ; Caffeine ; Cycloheximide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Changes in RNase activity during sporulation of a homothallic diploid strain of Saccharomyces cerevisiae were measured in caffeine-treated and non-treated cells. 1. In caffeine-treated cells soon after the transfer to the sporulation medium a significant increase in RNase activity was observed; in control cells the rise of RNase activity was less and started after a lag period of 5 h. The final activity of RNase was about twice as high in caffeine-treated cells as in control cells. 2. Increase in RNase activity during sporulation was sensitive to cycloheximide in control cells, but insensitive in caffeine-treated cells. 3. RNases from vegetative cells and from sporulating ones are different in their K m values. Relation of the changes in RNase activity to premeiotic DNA synthesis is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00428944
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