Mutations of the TATA-binding protein confer enhanced tolerance to hyperosmotic stress in Saccharomyces cerevisiae

2013 ◽  
Vol 97 (18) ◽  
pp. 8227-8238 ◽  
Author(s):  
Na-Rae Kim ◽  
Jungwoo Yang ◽  
Hyeji Kwon ◽  
Jieun An ◽  
Wonja Choi ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Binding Protein ◽  
Tata Binding Protein ◽  
Hyperosmotic Stress

scholarly journals NC2α Interacts with BTAF1 and Stimulates Its ATP-Dependent Association with TATA-Binding Protein

2004 ◽  
Vol 24 (22) ◽  
pp. 10072-10082 ◽  
Author(s):  
Marcin P. Klejman ◽  
Lloyd A. Pereira ◽  
Hester J. T. van Zeeburg ◽  
Siv Gilfillan ◽  
Michael Meisterernst ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Rna Polymerase Ii ◽  
Transcriptional Activity ◽  
Binding Protein ◽  
Tata Binding Protein ◽  
Present Evidence ◽  
Cell Extracts ◽  
Human Ortholog ◽  
Rna Polymerase Ii Transcription

ABSTRACT Transcriptional activity of the TATA-binding protein (TBP) is controlled by a variety of proteins. The BTAF1 protein (formerly known as TAFII170/TAF-172 and the human ortholog of Saccharomyces cerevisiae Mot1p) and the NC2 complex composed of NC2α (DRAP1) and NC2β (Dr1) are able to bind to TBP directly and regulate RNA polymerase II transcription both positively and negatively. Here, we present evidence that the NC2α subunit interacts with BTAF1. In contrast, the NC2β subunit is not able to associate with BTAF1 and seems to interfere with the BTAF1-TBP interaction. Addition of NC2α or the NC2 complex can stimulate the ability of BTAF1 to interact with TBP. This function is dependent on the presence of ATP in cell extracts but does not involve the ATPase activity of BTAF1 nor phosphorylation of NC2α. Together, our results constitute the first evidence of the physical cooperation between BTAF1 and NC2α in TBP regulation and provide a framework to understand transcription functions of NC2α and NC2β in vivo.

scholarly journals The Saccharomyces cerevisiae SPT8 gene encodes a very acidic protein that is functionally related to SPT3 and TATA-binding protein.

Genetics ◽  
1994 ◽  
Vol 137 (3) ◽  
pp. 647-657 ◽  
Author(s):  
D M Eisenmann ◽  
C Chapon ◽  
S M Roberts ◽  
C Dollard ◽  
F Winston
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Binding Protein ◽  
Tata Binding Protein ◽  
Sequence Motif ◽  
Heterotrimeric G Proteins ◽  
Eukaryotic Proteins ◽  
Multiple Copies ◽  
The Relationship ◽  
Insertion Mutations

Abstract Mutations in the Saccharomyces cerevisiae SPT8 gene were previously isolated as suppressors of retrotransposon insertion mutations in the 5' regions of the HIS4 and LYS2 genes. Mutations in SPT8 confer phenotypes similar to those caused by particular mutations in SPT15, which encodes the TATA-binding protein (TBP). These phenotypes are also similar to those caused by mutations in the SPT3 gene, which encodes a protein that directly interacts with TBP. We have now cloned and sequenced the SPT8 gene and have shown that it encodes a predicted protein of 602 amino acids with an extremely acidic amino terminus. In addition, the predicted SPT8 amino acid sequence contains one copy of a sequence motif found in multiple copies in a number of other eukaryotic proteins, including the beta subunit of heterotrimeric G proteins. To investigate further the relationship between SPT8, SPT3 and TBP, we have analyzed the effect of an spt8 null mutation in combination with different spt3 and spt15 mutations. This genetic analysis has shown that an spt8 deletion mutation is suppressed by particular spt3 alleles. Taken together with previous results, these data suggest that the SPT8 protein is required, directly or indirectly, for TBP function at particular promoters and that the role of SPT8 may be to promote a functional interaction between SPT3 and TBP.

scholarly journals SPT20/ADA5 encodes a novel protein functionally related to the TATA-binding protein and important for transcription in Saccharomyces cerevisiae.

1996 ◽  
Vol 16 (6) ◽  
pp. 3206-3213 ◽  
Author(s):  
S M Roberts ◽  
F Winston
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Transcriptional Activation ◽  
Transcription Initiation ◽  
Binding Protein ◽  
Tata Binding Protein ◽  
Missense Mutations ◽  
Poor Growth ◽  
New Gene ◽  
Novel Protein

Mutations selected as suppressors of Ty and solo delta insertion mutations is Saccharomyces cerevisiae have identified a number of genes important for transcription initiation. One of these gens, SPT15, encodes the TATA-binding protein, and three others, SPT3, SPT7, and SPT8, encode proteins functionally related to the TATA-binding protein. To identify additional related functions, we have selected for new spt mutations. This work has identified one new gene, SPT20. Null mutations in SPT20 cause poor growth and a set of severe transcriptional defects very similar to those caused by null mutations in SPT3, SPT7, and SPT8 and also very similar to those caused by certain missense mutations in SPT15. Consistent with its having an important function in transcription in vivo, SPT20 was also recently identified as ADA5 and has been shown to be important for transcriptional activation (G.A. Marcus, J. Horiuchi, N. Silverman, and L. Guarente, Mol. Cell. Biol. 16:3197-3205, 1996.

scholarly journals Impaired Uptake and/or Utilization of Leucine by Saccharomyces cerevisiae Is Suppressed by the SPT15-300 Allele of the TATA-Binding Protein Gene

2009 ◽  
Vol 75 (19) ◽  
pp. 6055-6061 ◽  
Author(s):  
Richard J. S. Baerends ◽  
Jin-Long Qiu ◽  
Simon Rasmussen ◽  
Henrik Bjørn Nielsen ◽  
Anders Brandt
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Mutant Allele ◽  
Binding Protein ◽  
Growth Conditions ◽  
Tata Binding Protein ◽  
Brewing Yeast ◽  
Yeast Extract Peptone Dextrose ◽  
Expression Of Genes ◽  
Low Concentrations ◽  
Saccharomyces Pastorianus

ABSTRACT Successful fermentations to produce ethanol require microbial strains that have a high tolerance to glucose and ethanol. Enhanced glucose/ethanol tolerance of the laboratory yeast Saccharomyces cerevisiae strain BY4741 under certain growth conditions as a consequence of the expression of a dominant mutant allele of the SPT15 gene (SPT1 5-3 00) corresponding to the three amino acid changes F177S, Y195H, and K218R has been reported (H. Alper, J. Moxley, E. Nevoigt, G. R. Fink, and G. Stephanopoulos, Science 314:1565-1568, 2006). The SPT15 gene codes for the TATA-binding protein. This finding prompted us to examine the effect of expression of the SPT1 5-3 00 allele in various yeast species of industrial importance. Expression of SPT1 5-3 00 in leucine-prototrophic strains of S. cerevisiae, Saccharomyces bayanus, or Saccharomyces pastorianus (lager brewing yeast), however, did not improve tolerance to ethanol on complex rich medium (yeast extract-peptone-dextrose). The enhanced growth of the laboratory yeast strain BY4741 expressing the SPT1 5-3 00 mutant allele was seen only on defined media with low concentrations of leucine, indicating that the apparent improved growth in the presence of ethanol was indeed associated with enhanced uptake and/or utilization of leucine. Reexamination of the microarray data published by Alper and coworkers likewise suggested that expression of genes coding for the leucine permeases, Tat1p and Bap3p, were upregulated in the SPT1 5-3 00 mutant, as was expression of the genes ARO10, ADH3, ADH5, and SFA1, involved in leucine degradation.

scholarly journals A novel 66-kilodalton protein complexes with Rrn6, Rrn7, and TATA-binding protein to promote polymerase I transcription initiation in Saccharomyces cerevisiae.

1996 ◽  
Vol 16 (11) ◽  
pp. 6436-6443 ◽  
Author(s):  
C W Lin ◽  
B Moorefield ◽  
J Payne ◽  
P Aprikian ◽  
K Mitomo ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Transcription Initiation ◽  
Protein Complexes ◽  
Binding Protein ◽  
Strong Association ◽  
Tata Binding Protein ◽  
Yeast Saccharomyces Cerevisiae ◽  
Pol I ◽  
Polymerase I

We report the cloning of RRN11, a gene coding for a 66-kDa protein essential for transcription initiation by RNA polymerase I (Pol I) in the yeast Saccharomyces cerevisiae. Rrn11 specifically complexes with two previously identified transcription factors, Rrn6 and Rrn7 (D. A. Keys, J. S. Steffan, J. A. Dodd, R. T. Yamamoto, Y. Nogi, and M. Nomura, Genes Dev. 8:2349-2362, 1994). The Rrn11-Rrn6-Rrn7 complex also binds the TATA-binding protein and is required for transcription by the core domain of the Pol I promoter. Therefore, we have designated the Rrn11-Rrn6-Rrn7-TATA-binding protein complex the yeast Pol I core factor. A two-hybrid assay was used to demonstrate involvement of short leucine heptad repeats on both Rrn11 and Rrn6 in the in vivo association of these two proteins. This assay also verified the previously described strong association between Rrn6 and Rrn7, independent of the Rrn6 leucine repeat.

scholarly journals Evidence that Spt3 functionally interacts with Mot1, TFIIA, and TATA-binding protein to confer promoter-specific transcriptional control in Saccharomyces cerevisiae.

1997 ◽  
Vol 17 (1) ◽  
pp. 287-295 ◽  
Author(s):  
J M Madison ◽  
F Winston
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Rna Polymerase Ii ◽  
Transcriptional Control ◽  
Binding Protein ◽  
Tata Binding Protein ◽  
Genetic Interactions ◽  
Insertion Mutation ◽  
General Transcription Factor ◽  
Biochemical Analyses

Spt3 of Saccharomyces cerevisiae is a factor required for normal transcription from particular RNA polymerase II-dependent promoters. Previous genetic and biochemical analyses have shown that Spt3 interacts with the yeast TATA-binding protein (TBP). To identify other factors that might interact with Spt3, we have screened for mutations that, in combination with an spt3 null mutation, lead to inviability. In this way, we have identified a mutation in MOT1, which encodes an ATP-dependent inhibitor of TBP binding to TATA boxes: Previous analyses suggested that Mot1 causes repression in vivo. However, our analysis of mot1 mutants shows that, similar to spt3 mutants, they have decreased levels of transcription from certain genes, suggesting that Mot1 may function as an activator in vivo. In addition, mot1 mutants have other phenotypes in common with spt3 delta mutants, including suppression of the insertion mutation his4-912 delta. Motivated by these Spt3-Mot1 genetic interactions, we tested for genetic interactions between Spt3 and the general transcription factor TFIIA. TFIIA has been shown previously to be functionally related to Mot1. We found that overexpression of TFIIA partially suppresses an spt3 delta mutation, that toa1 mutants have Spt-phenotypes, and that spt3 delta toa1 double mutants are inviable. We believe that, taken together, these data suggest that Spt3, Mot1, and TFIIA cooperate to regulate TBP-DNA interactions, perhaps at the level of TATA box selection in vivo.

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