A role for intronic sequences on expression of thyroid hormone receptor alpha gene.

Détails

ID Serval
serval:BIB_9ED4F35D4DCD
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
A role for intronic sequences on expression of thyroid hormone receptor alpha gene.
Périodique
Journal of Biological Chemistry
Auteur(s)
Lazar J., Desvergne B., Zimmerman E.C., Zimmer D.B., Magnuson M.A., Nikodem V.M.
ISSN
0021-9258
Statut éditorial
Publié
Date de publication
08/1994
Peer-reviewed
Oui
Volume
269
Numéro
32
Pages
20352-20359
Langue
anglais
Résumé
We have cloned and characterized the organization of the rat thyroid hormone receptor alpha (THR) gene. Multiple transcription start sites were mapped by RNA primer extension analyses. The promoter of the rat THR alpha gene does not contain a TATA or CAAT box. Deletion analyses of the 5' region of THR alpha gene and transfection assays, using NIH3T3 and NG108-15 cells, revealed that the sequences from -137 to +205 (+205 resides in the first intron) are necessary for efficient expression of this gene. This region contains two positively acting elements, the sequence -137 to -60 upstream from the major start of transcription and three copies of an AGG sequence located in the first intron. In contrast, two octamer-binding motifs in the first intron function as the negative regulatory elements. Gel mobility shift assays showed that the purine-rich sequence and the octamer-binding motifs bind to a protein(s) present in NIH3T3 and NG108-15 cells, the recipients in transient transfection assays. Genomic sequence comparison of THR alpha and beta revealed the presence of the purine-rich track in both genes, while the octamer-binding motifs were found only in the alpha gene. These results might explain the differential regulation of THR alpha and beta gene expression previously noted.
Mots-clé
3T3 Cells, Animals, Base Sequence, Chloramphenicol O-Acetyltransferase/genetics, DNA, DNA-Binding Proteins/metabolism, Exons, Humans, Introns, Mice, Molecular Sequence Data, Promoter Regions, Genetic, Rats, Receptors, Thyroid Hormone/genetics, Sequence Deletion, Sequence Homology, Nucleic Acid, Transcription, Genetic
Pubmed
Web of science
Création de la notice
24/01/2008 15:26
Dernière modification de la notice
20/08/2019 15:05
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