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| Content Provider | PubMed Central |
|---|---|
| Author | Maguire, H. F. Siddiqui, A. Qadri, I. |
| Abstract | Several viral transcriptional activators have been shown to interact with the basal transcription factor TATA-binding protein (TBP). These associations have been implicated in facilitating the assembly of the transcriptional preinitiation complex. We report here that the hepatitis B virus protein X (pX) specifically binds to TBP in vitro. While truncations of the highly conserved carboxyl terminus of TBP abolished this binding, amino-terminal deletions had no effect. Deletion analysis suggests that a domain consisting of 71 aa in the highly conserved carboxyl-terminal region of TBP is necessary for its interaction with pX. The minimal region in pX sufficient for its interaction with TBP includes aa 110-143. Furthermore, TBP from phylogenetically distinct species including Arabidopsis thaliana, Saccharomyces cerevisiae, Drosophila melanogaster, and Solanum tuberosum (potato) bound to pX. The pX-TBP interaction was inhibited in the presence of nonhydrolyzable analogs of ATP, suggesting a requirement for ATP. These results provide an explanation for the promiscuous behavior of pX in the transactivation of a large repertoire of cellular promoters. This study further implicates a fundamental role for pX in modulating transcriptional regulatory pathways by interacting with the basal transcription factor TBP. |
| Starting Page | 1003 |
| File Format | |
| ISSN | 10916490 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 4 |
| Volume Number | 92 |
| Language | English |
| Publisher Date | 1995-02-14 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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