Molecular characterization of Vig4/Vrg4 GDP-mannose transporter of the yeast Saccharomyces cerevisiae

FEBS Letters ◽  
1999 ◽  
Vol 458 (3) ◽  
pp. 309-312 ◽  
Author(s):  
Masato Abe ◽  
Hitoshi Hashimoto ◽  
Koji Yoda
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Molecular Characterization ◽  
Yeast Saccharomyces Cerevisiae

scholarly journals Sug1 modulates yeast transcription activation by Cdc68.

1995 ◽  
Vol 15 (11) ◽  
pp. 6025-6035 ◽  
Author(s):  
Q Xu ◽  
R A Singer ◽  
G C Johnston
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Transcriptional Regulation ◽  
Molecular Characterization ◽  
Temperature Sensitivity ◽  
Null Allele ◽  
Transcription Activation ◽  
Suppressor Gene ◽  
Yeast Saccharomyces Cerevisiae

The Cdc68 protein is required for the transcription of a variety of genes in the yeast Saccharomyces cerevisiae. In a search for proteins involved in the activity of the Cdc68 protein, we identified four suppressor genes in which mutations reverse the temperature sensitivity caused by the cdc68-1 allele. We report here the molecular characterization of mutations in one suppressor gene, the previously identified SUG1 gene. The Sug1 protein has been implicated in both transcriptional regulation and proteolysis. sug1 suppressor alleles reversed most aspects of the cdc68-1 mutant phenotype but did not suppress the lethality of a cdc68 null allele, indicating that sug1 suppression is by restoration of Cdc68 activity. Our evidence suggests that suppression by sug1 is unlikely to be due to increased stability of mutant Cdc68 protein, despite the observation that Sug1 affected proteolysis of mutant Cdc68. We report here that attenuated Sug1 activity strengthens mutant Cdc68 activity, whereas increased Sug1 activity further inhibits enfeebled Cdc68 activity, suggesting that Sug1 antagonizes the activator function of Cdc68 for transcription. Consistent with this hypothesis, we find that Sug1 represses transcription in vivo.

scholarly journals Molecular characterization of Saccharomyces cerevisiae Δ3,Δ2-enoyl-CoA isomerase. Vol. 273 (1998) 33184–33191

2005 ◽  
Vol 280 (13) ◽  
pp. 13203
Author(s):  
Brian V. Geisbrecht ◽  
Dai Zhu ◽  
Kerstin Schulz ◽  
Katja Nau ◽  
James C. Morrell ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Molecular Characterization

scholarly journals Cloning and characterization of four SIR genes of Saccharomyces cerevisiae.

1986 ◽  
Vol 6 (2) ◽  
pp. 688-702 ◽  
Author(s):  
J M Ivy ◽  
A J Klar ◽  
J B Hicks
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Mating Type ◽  
Blot Analysis ◽  
Transcriptional Control ◽  
Genomic Library ◽  
Yeast Saccharomyces Cerevisiae ◽  
Mating Type Genes ◽  
Rna Blots

Mating type in the yeast Saccharomyces cerevisiae is determined by the MAT (a or alpha) locus. HML and HMR, which usually contain copies of alpha and a mating type information, respectively, serve as donors in mating type interconversion and are under negative transcriptional control. Four trans-acting SIR (silent information regulator) loci are required for repression of transcription. A defect in any SIR gene results in expression of both HML and HMR. The four SIR genes were isolated from a genomic library by complementation of sir mutations in vivo. DNA blot analysis suggests that the four SIR genes share no sequence homology. RNA blots indicate that SIR2, SIR3, and SIR4 each encode one transcript and that SIR1 encodes two transcripts. Null mutations, made by replacement of the normal genomic allele with deletion-insertion mutations created in the cloned SIR genes, have a Sir- phenotype and are viable. Using the cloned genes, we showed that SIR3 at a high copy number is able to suppress mutations of SIR4. RNA blot analysis suggests that this suppression is not due to transcriptional regulation of SIR3 by SIR4; nor does any SIR4 gene transcriptionally regulate another SIR gene. Interestingly, a truncated SIR4 gene disrupts regulation of the silent mating type loci. We propose that interaction of at least the SIR3 and SIR4 gene products is involved in regulation of the silent mating type genes.

scholarly journals The Identification and Characterization of ADR6, a Gene Required for Sporulation and for Expression of the Alcohol Dehydrogenase II Isozyme From Saccharomyces cerevisiae

Genetics ◽  
1987 ◽  
Vol 116 (4) ◽  
pp. 523-530
Author(s):  
Aileen K W Taguchi ◽  
Elton T Young
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Alcohol Dehydrogenase ◽  
Isocitrate Lyase ◽  
Carbon Sources ◽  
Recessive Mutation ◽  
Yeast Saccharomyces Cerevisiae ◽  
Upstream Activating Sequence ◽  
Adh Activity ◽  
Identification And Characterization

ABSTRACT The alcohol dehydrogenase II isozyme (enzyme, ADHII; structural gene, ADH2) of the yeast, Saccharomyces cerevisiae, is under stringent carbon catabolite control. This cytoplasmic isozyme exhibits negligible activity during growth in media containing fermentable carbon sources such as glucose and is maximal during growth on nonfermentable carbon sources. A recessive mutation, adr6-1, and possibly two other alleles at this locus, were selected for their ability to decrease Ty-activated ADH2-6 c expression. The adr6-1 mutation led to decreased ADHII activity in both ADH2-6c and ADH2+ strains, and to decreased levels of ADH2 mRNA. Ty transcription and the expression of two other carbon catabolite regulated enzymes, isocitrate lyase and malate dehydrogenase, were unaffected by the adr6-1 mutation. adr6-1/adr6-1strains were defective for sporulation, indicating that adr6 mutations may have pleiotropic effects. The sporulation defect was not a consequence of decreased ADH activity. Since the ADH2-6c mutation is due to insertion of a 5.6-kb Ty element at the TATAA box, it appears that the ADR6+-dependent ADHII activity required ADH2 sequences 3′ to or including the TATAA box. The ADH2 upstream activating sequence (UAS) was probably not required. The ADR6 locus was unlinked to the ADR1 gene which encodes another trans-acting element required for ADH2 expression.

scholarly journals Conservation of function and regulation within the Cdc28/cdc2 protein kinase family: characterization of the human Cdc2Hs protein kinase in Saccharomyces cerevisiae.

1989 ◽  
Vol 9 (9) ◽  
pp. 4064-4068 ◽  
Author(s):  
C Wittenberg ◽  
S I Reed
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Protein Kinase ◽  
Yeast Strain ◽  
Cell Cycle Progression ◽  
G1 Arrest ◽  
Yeast Saccharomyces Cerevisiae ◽  
Environmental Signals ◽  
Transgenic Yeast ◽  
M Phase

Whereas the Cdc28 protein kinase of the budding yeast Saccharomyces cerevisiae plays an essential role in cell cycle progression during the G1 interval, a function in the progression from the G2 interval into M phase has been inferred for its homologs, including the Cdc2Hs protein kinase of humans. To better understand these apparently disparate roles, we constructed a yeast strain in which the resident CDC28 gene was replaced by its human homolog, CDC2Hs. This transgenic yeast strain was able to perform the G1 functions attributed to the Cdc28 protein kinase, including the ability to grow and divide normally, to respond to environmental signals that induce G1 arrest, and to regulate the Cdc2Hs protein kinase appropriately in response to these signals.

Purification and characterization of wheat α-gliadin synthesized in the yeast, Saccharomyces cerevisiae

Gene ◽  
1992 ◽  
Vol 116 (2) ◽  
pp. 119-127 ◽  
Author(s):  
Ann E. Blechl ◽  
Kristin S. Thrasher ◽  
William H. Vensel ◽  
Frank C. Greene
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Purification And Characterization ◽  
Yeast Saccharomyces Cerevisiae
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