scholarly journals Robust heat shock induces eIF2 -phosphorylation-independent assembly of stress granules containing eIF3 and 40S ribosomal subunits in budding yeast, Saccharomyces cerevisiae

2009 ◽  
Vol 122 (12) ◽  
pp. 2078-2088 ◽  
Author(s):  
T. Grousl ◽  
P. Ivanov ◽  
I. Frydlova ◽  
P. Vasicova ◽  
F. Janda ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Heat Shock ◽  
Budding Yeast ◽  
Stress Granules ◽  
Yeast Saccharomyces Cerevisiae ◽  
Ribosomal Subunits ◽  
Eif2 Phosphorylation

scholarly journals Filamentous growth of the budding yeast Saccharomyces cerevisiae induced by overexpression of the WHI2 gene

Microbiology ◽  
1997 ◽  
Vol 143 (6) ◽  
pp. 1867-1876 ◽  
Author(s):  
P. A. Radcliffe ◽  
K. M. Binley ◽  
J. Trevethick ◽  
M. Hall ◽  
P. E. Sudbery
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Budding Yeast ◽  
Filamentous Growth ◽  
Yeast Saccharomyces Cerevisiae

Heat shock factor can activate transcription while bound to nucleosomal DNA in Saccharomyces cerevisiae

1994 ◽  
Vol 14 (1) ◽  
pp. 189-199
Author(s):  
D S Pederson ◽  
T Fidrych
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Heat Shock ◽  
Transcription Initiation ◽  
Heat Shock Factor ◽  
Micrococcal Nuclease ◽  
Nucleosome Assembly ◽  
Heat Shock Element ◽  
Yeast Saccharomyces Cerevisiae ◽  
Nucleosomal Dna

After each round of replication, new transcription initiation complexes must assemble on promoter DNA. This process may compete with packaging of the same promoter sequences into nucleosomes. To elucidate interactions between regulatory transcription factors and nucleosomes on newly replicated DNA, we asked whether heat shock factor (HSF) could be made to bind to nucleosomal DNA in vivo. A heat shock element (HSE) was embedded at either of two different sites within a DNA segment that directs the formation of a stable, positioned nucleosome. The resulting DNA segments were coupled to a reporter gene and transfected into the yeast Saccharomyces cerevisiae. Transcription from these two plasmid constructions after induction by heat shock was similar in amount to that from a control plasmid in which HSF binds to nucleosome-free DNA. High-resolution genomic footprint mapping of DNase I and micrococcal nuclease cleavage sites indicated that the HSE in these two plasmids was, nevertheless, packaged in a nucleosome. The inclusion of HSE sequences within (but relatively close to the edge of) the nucleosome did not alter the position of the nucleosome which formed with the parental DNA fragment. Genomic footprint analyses also suggested that the HSE-containing nucleosome was unchanged by the induction of transcription. Quantitative comparisons with control plasmids ruled out the possibility that HSF was bound only to a small fraction of molecules that might have escaped nucleosome assembly. Analysis of the helical orientation of HSE DNA in the nucleosome indicated that HSF contacted DNA residues that faced outward from the histone octamer. We discuss the significance of these results with regard to the role of nucleosomes in inhibiting transcription and the normal occurrence of nucleosome-free regions in promoters.

scholarly journals Heat shock causes a decrease in polysomes and the appearance of stress granules in trypanosomes independently of eIF2  phosphorylation at Thr169

2008 ◽  
Vol 121 (18) ◽  
pp. 3002-3014 ◽  
Author(s):  
S. Kramer ◽  
R. Queiroz ◽  
L. Ellis ◽  
H. Webb ◽  
J. D. Hoheisel ◽  
...  
Keyword(s):  
Heat Shock ◽  
Stress Granules ◽  
Eif2 Phosphorylation

scholarly journals Ribosomal protein L30 is dispensable in the yeast Saccharomyces cerevisiae.

1990 ◽  
Vol 10 (10) ◽  
pp. 5235-5243 ◽  
Author(s):  
D M Baronas-Lowell ◽  
J R Warner
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Ribosomal Protein ◽  
Ribosomal Proteins ◽  
Wild Type ◽  
Diploid Strain ◽  
Chain Reaction ◽  
Yeast Saccharomyces Cerevisiae ◽  
Ribosomal Subunits ◽  
Strong Homology ◽  
Polymerase Chain

In the yeast Saccharomyces cerevisiae, L30 is one of many ribosomal proteins that is encoded by two functional genes. We have cloned and sequenced RPL30B, which shows strong homology to RPL30A. Use of mRNA as a template for a polymerase chain reaction demonstrated that RPL30B contains an intron in its 5' untranslated region. This intron has an unusual 5' splice site, C/GUAUGU. The genomic copies of RPL30A and RPL30B were disrupted by homologous recombination. Growth rates, primer extension, and two-dimensional ribosomal protein analyses of these disruption mutants suggested that RPL30A is responsible for the majority of L30 production. Surprisingly, meiosis of a diploid strain carrying one disrupted RPL30A and one disrupted RPL30B yielded four viable spores. Ribosomes from haploid cells carrying both disrupted genes had no detectable L30, yet such cells grew with a doubling time only 30% longer than that of wild-type cells. Furthermore, depletion of L30 did not alter the ratio of 60S to 40S ribosomal subunits, suggesting that there is no serious effect on the assembly of 60S subunits. Polysome profiles, however, suggest that the absence of L30 leads to the formation of stalled translation initiation complexes.

Biotransformation of organic selenium compounds in budding yeast,Saccharomyces cerevisiae

Metallomics ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1257-1263 ◽  
Author(s):  
Yasumitsu Ogra ◽  
Maya Shimizu ◽  
Kazuaki Takahashi ◽  
Yasumi Anan
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Budding Yeast ◽  
Yeast Saccharomyces Cerevisiae ◽  
Selenium Compounds ◽  
Organic Selenium ◽  
Selenoamino Acids

Organic selenium metabolites of plants and animals such as selenoamino acids and selenosugars are metabolized to selenomethionine in yeast.

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