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The TAF9 C-terminal conserved region domain is required for SAGA and TFIID promoter occupancy to promote transcriptional activation
- Source :
- Molecular and cellular biology. 34(9)
- Publication Year :
- 2014
-
Abstract
- A common function of the TFIID and SAGA complexes, which are recruited by transcriptional activators, is to deliver TBP to promoters to stimulate transcription. Neither the relative contributions of the five shared TBP-associated factor (TAF) subunits in TFIID and SAGA nor the requirement for different domains in shared TAFs for transcriptional activation is well understood. In this study, we uncovered the essential requirement for the highly conserved C-terminal region (CRD) of Taf9, a shared TAF, for transcriptional activation in yeast. Transcriptome profiling performed under Gcn4-activating conditions showed that the Taf9 CRD is required for induced expression of ∼9% of the yeast genome. The CRD was not essential for the Taf9-Taf6 interaction, TFIID or SAGA integrity, or Gcn4 interaction with SAGA in cell extracts. Microarray profiling of a SAGA mutant (spt20Δ) yielded a common set of genes induced by Spt20 and the Taf9 CRD. Chromatin immunoprecipitation (ChIP) assays showed that, although the Taf9 CRD mutation did not impair Gcn4 occupancy, the occupancies of TFIID, SAGA, and the preinitiation complex were severely impaired at several promoters. These results suggest a crucial role for the Taf9 CRD in genome-wide transcription and highlight the importance of conserved domains, other than histone fold domains, as a common determinant for TFIID and SAGA functions.
- Subjects :
- Transcriptional Activation
Saccharomyces cerevisiae Proteins
TATA box
macromolecular substances
Saccharomyces cerevisiae
Biology
Gene Expression Regulation, Fungal
Protein Interaction Maps
Promoter Regions, Genetic
Author Correction
Molecular Biology
Genetics
TATA-Binding Protein Associated Factors
Arginase
Cell Biology
eye diseases
Protein Structure, Tertiary
TAF1
Basic-Leucine Zipper Transcription Factors
TAF4
Transcription Factor TFIID
Transcription preinitiation complex
Mutation
Trans-Activators
Transcription factor II D
Transcription factor II A
Subjects
Details
- ISSN :
- 10985549
- Volume :
- 34
- Issue :
- 9
- Database :
- OpenAIRE
- Journal :
- Molecular and cellular biology
- Accession number :
- edsair.doi.dedup.....90c0825f0884a620f7b3903836913871