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| Content Provider | PubMed Central |
|---|---|
| Author | Jones, M. H. Learned, R. M. Tjian, R. |
| Abstract | We have mapped the cis regulatory elements required in vivo for initiation at the human rRNA promoter by RNA polymerase I. Transient expression in COS-7 cells was used to evaluate the transcription phenotype of clustered base substitution mutations in the human rRNA promoter. The promoter consists of two major elements: a large upstream region, composed of several domains, that lies between nucleotides -234 and -107 relative to the transcription initiation site and affects transcription up to 100-fold and a core element that lies between nucleotides -45 and +20 and affects transcription up to 1000-fold. The upstream region is able to retain partial function when positioned within 100-160 nucleotides of the transcription initiation site, but it cannot stimulate transcription from distances of greater than or equal to 600 nucleotides. In addition, we demonstrate, using mouse-human hybrid rRNA promoters, that the sequences responsible for human species-specific transcription in vivo appear to reside in both the core and upstream elements, and sequences from the mouse rRNA promoter cannot be substituted for them. |
| Starting Page | 669 |
| File Format | |
| ISSN | 10916490 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 3 |
| Volume Number | 85 |
| Language | English |
| Publisher Date | 1988-02-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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