Factors involved in specific transcription by human RNA polymerase II: analysis by a rapid and quantitative in vitro assay
| Autor: | Michele Sawadogo, Robert G. Roeder |
|---|---|
| Rok vydání: | 1985 |
| Předmět: |
Multidisciplinary
Transcription Genetic biology General transcription factor RNA polymerase II Templates Genetic Molecular biology Kinetics Operon biology.protein Humans Transcription factor II F Guanosine Triphosphate RNA Polymerase II Ribonuclease T1 Transcription factor II E Transcription factor II D RNA polymerase II holoenzyme Transcription factor II B Transcription factor II A Research Article HeLa Cells Plasmids |
| Zdroj: | Proceedings of the National Academy of Sciences. 82:4394-4398 |
| ISSN: | 1091-6490 0027-8424 |
| DOI: | 10.1073/pnas.82.13.4394 |
| Popis: | We describe a new assay system that allows a rapid, direct, and quantitative detection of promoter-dependent in vitro transcription by RNA polymerase II. The template used is a hybrid plasmid containing the adenovirus major late promoter linked to a synthetic 400-base-pair DNA fragment that lacks cytidine residues on the transcribed strand--i.e., generates a transcript with no guanosine residues. In vitro transcriptions are carried out in the absence of GTP or, if the reactions contain GTP, in the presence of RNase T1 and the chain terminator 3'-0-methyl-GTP. Under these conditions the only RNAs that can accumulate, whether from a circular or linearized DNA template, are the 400-nucleotide RNase T1-resistant transcripts resulting from accurate initiation at the major late promoter. Thus, specific transcription can be directly monitored by conventional RNA quantitation methods. Using this fast assay, we show that three basic transcription factors, TFIIB, TFIID, and TFIIE, are absolutely required, in addition to the RNA polymerase II, for specific transcription initiation from the adenovirus major late promoter. Units of activity can be defined for each of these individual components. The applicability of this kind of assay to other systems is discussed. |
| Databáze: | OpenAIRE |
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