Precisely positioned nucleosomes are not essential for c-fos gene regulation in vivo
Détails
ID Serval
serval:BIB_856063B40714
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Precisely positioned nucleosomes are not essential for c-fos gene regulation in vivo
Périodique
Gene
ISSN
0378-1119 (Print)
Statut éditorial
Publié
Date de publication
09/2000
Volume
255
Numéro
2
Pages
169-84
Notes
Journal Article
Research Support, Non-U.S. Gov't --- Old month value: Sep 19
Research Support, Non-U.S. Gov't --- Old month value: Sep 19
Résumé
Chromatin architecture plays a decisive role in many aspects of transcription regulation. We have tested the role of specific chromatin structures in c-fos gene regulation, using a gene transfer system based on episomes derived from the Epstein-Barr virus (EBV). This system reproduces in several respects the chromatin structure and regulation of the chromosomal c-fos gene. Using this approach, we first demonstrate that the pausing of RNA polymerase II downstream of the transcriptional start site does not require precisely positioned nucleosomes. Indeed, changing the pattern of MNase hypersensitive sites along the transcribed sequence does not perturb RNA polymerase II pausing or the regulation of the c-fos gene. Next, we show that a putative nucleosome positioned between the SIE/SRE elements (-300) and the CRE/TATA elements (-36) is not necessary for activation by a variety of inducers. Accordingly, total or partial deletion of the putative nucleosome sequence does not disturb c-fos regulation while the two regulatory sites flanking the nucleosome sequence remain hypersensitive to MNase. As described in this paper, EBV episomes are useful vectors to critically examine the role of the chromatin structure in gene transcription for human cells.
Mots-clé
Animals
Cell Line
Chromatin/genetics
DNA/genetics/metabolism
Dose-Response Relationship, Drug
Forskolin/pharmacology
Gene Expression Regulation/drug effects
Herpesvirus 4, Human/genetics
Humans
Ionomycin/pharmacology
Jurkat Cells
Luciferases/genetics/metabolism
Mice
Nucleosomes/*genetics
Plasmids/genetics
Promoter Regions (Genetics)/genetics
Proto-Oncogene Proteins c-fos/*genetics
RNA Polymerase II/metabolism
Recombinant Fusion Proteins/drug effects/genetics/metabolism
Tetradecanoylphorbol Acetate/pharmacology
Tumor Cells, Cultured
Pubmed
Web of science
Création de la notice
25/01/2008 9:41
Dernière modification de la notice
20/08/2019 15:44