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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Burke, T. W. Kadonaga, J. T. |
| Description | Author Affiliation: Burke TW ( Department of Biology and Center for Molecular Genetics, University of California, San Diego, La Jolla, California 92093-0347 USA.) |
| Abstract | We analyzed the function of the downstream promoter element (DPE), a distinct 7-nucleotide core promoter element that is approximately 30 nucleotides downstream of the transcription start site of many TATA-box-deficient (TATA-less) promoters in Drosophila. There is a strict requirement for spacing between the Inr and DPE motifs, as an increase or decrease of 3 nucleotides in the distance between the Inr and DPE causes a seven- to eightfold reduction in transcription as well as a significant reduction in the binding of purified TFIID. These results suggest a specific and somewhat rigid interaction of TFIID with the Inr and DPE sequences. Photo-cross-linking analysis of purified TFIID with a TATA-less DPE-containing promoter revealed specific cross-linking of dTAFII60 and dTAFII40 to the DPE, with a higher efficiency of cross-linking to dTAFII60 than to dTAFII40. These data, combined with the previously well-characterized interactions between the two TAFs and their homology to histones H4 and H3, suggest that a dTAFII60-dTAFII40 heterotetramer binds to the DPE. Human and Drosophila transcription factors exhibit essentially the same requirements for DPE sequence and for Inr-DPE spacing. In addition, the TATA-less promoter of the human interferon regulatory factor-1 (IRF-1) gene contains a DPE that is important for transcriptional activity both in vitro and in cultured cells. Hence, these studies provide evidence for a direct role of TAFs in basal transcription of TATA-less DPE-containing genes and collectively indicate that the DPE is, in many respects, a downstream counterpart to the TATA box that is present in Drosophila to humans. |
| File Format | HTM / HTML |
| ISSN | 08909369 |
| e-ISSN | 15495477 |
| Journal | Genes & Development |
| Issue Number | 22 |
| Volume Number | 11 |
| Language | English |
| Publisher | Cold Spring Harbor Laboratory Press |
| Publisher Date | 1997-11-15 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Discipline Molecular Discipline Biology__semicolon__developmental Discipline Biology__semicolon__genetics__semicolon__cell Discipline Biology Drosophila Proteins Drosophila Melanogaster Genetics Promoter Regions, Genetic Tata-binding Protein Associated Factors Transcription Factor Tfiid Transcription Factors Metabolism Animals Binding Sites Cell Line Dna-binding Proteins Gene Expression Regulation Transcription, Genetic Research Support, U.s. Gov't, P.h.s. |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Developmental Biology |
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