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| Content Provider | PubMed Central |
|---|---|
| Author | Chaudhary, S. Brou, C. Valentin, M. E. Burton, N. Tora, L. Chambon, P. Davidson, I. |
| Abstract | Transcription in HeLa cell extracts in vitro was stimulated 8- to 10-fold by a recombinant chimera, GAL-TEF-1, consisting of the DNA-binding domain of GAL4 and the activation function of the HeLa cell activator TEF-1. In contrast, only a 2- to 3-fold stimulation was obtained with GAL-TEF-1 in extracts from BJA-B lymphoid cells. Stimulation by GAL-TEF-1 in BJA-B extracts was dramatically increased by the addition of immunopurified HeLa cell TFIID, suggesting that BJA-B TFIID lacks or contains lower quantities of a TATA-binding-protein-associated factor(s) required for the activity of the TEF-1 activation function. However, chromatography, immunopurification, and transcriptional reconstitution experiments indicated that BJA-B extracts did not lack the previously identified TATA-binding-protein-associated factors required for TEF-1 activity but rather contained a negatively acting factor(s) which inhibited transactivation by GAL-TEF-1. These results indicate that the relative lack of activity of the TEF-1 activation function in vitro in BJA-B cell extracts does not result from the absence of positively acting factors from the presence of a cell-specific negatively acting factor(s). |
| Starting Page | 5290 |
| File Format | |
| ISSN | 10985549 |
| e-ISSN | 10985549 |
| Journal | Molecular and Cellular Biology |
| Issue Number | 8 |
| Volume Number | 14 |
| Language | English |
| Publisher Date | 1994-08-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Molecular Biology |
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