2010 Fiscal Year Final Research Report
Mechanisms of transcriptional initiation and regulation mediated by general transcription factor TFIID
| Project/Area Number |
20370071
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Molecular biology
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| Research Institution | Yokohama City University |
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Principal Investigator |
KOKUBO Tetsuro Yokohama City University, 生命ナノシステム科学研究科, 教授 (10271587)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 転写調節 / 転写因子 / 基本転写因子 / 転写開始 / 出芽酵母 / TFIID / TAF / TBP |
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| Research Abstract |
In eukaryotes, protein-coding genes are transcribed by RNA polymerase II (pol II) together with general transcription factors (GTFs). TFIID, the largest GTF composed of TATA element-binding protein (TBP) and 14 TBP-associated factors (TAFs), plays a critical role in transcription from TATA-less promoters. In metazoans, several core promoter elements other than the TATA element are thought to be recognition sites for TFIID. However, it is unclear whether functionally homologous elements also exist in TATA-less promoters in Saccharomyces cerevisiae. Here, we identify the cis-elements required to support normal levels of transcription and accurate initiation from sites within the TATA-less and TFIID-dependent RPS5 core promoter. Systematic mutational analyses show that multiple AT-rich sequences are required for these activities and appear to function as recognition sites for TFIID. A single copy of these sequences can support accurate initiation from the endogenous promoter, indicating that they carry highly redundant functions. These results show a novel architecture of yeast TATA-less promoters and support a model in which pol II scans DNA downstream from a recruited site, while searching for appropriate initiation site(s).
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[Journal Article] Molecular basis for SUMOylation-dependent regulation of DNA binding activity of heat shock factor 2.2009
Author(s)
Y. Tateishi, M. Ariyoshi, R. Igarashi, H. Hara, K. Mizuguchi, A. Seto, A. Nakai, T. Kokubo, H. Tochio, M. Shirakawa
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Journal Title
J.Biol.Chem. vol.284, No.4
Pages: 2435-2447
Peer Reviewed
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