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http://dx.doi.org/10.5352/JLS.2005.15.1.055

Transcriptional Regulation of the Murine Dopamine Receptor Regulating Factor (DRRF) Gene  

Kim Ok Soo (Department of Bioscience and Biotechnology, Silla University)
Lee Young-Choon (Division of Biotechnology, Faculty of Natural Resources and Life Science, Dong-A University)
Lee Sang-Hyeon (Department of Bioscience and Biotechnology, Silla University)
Publication Information
Journal of Life Science / v.15, no.1, 2005 , pp. 55-60 More about this Journal
Abstract
The murine dopamine receptor regulating factor (DRRF) gene is transcribed from a TATA-less promoter that has several putative Sp1 binding sites. The present investigation identifies functional transcription factors that modulate the expression of this gene, In the $D_2-expressing$ NB41A3 cells, Spl potently activates transcription from the DRRF promoter in pCAT-DRRF-1153/+17, but DRRF effectively inhibits it. Deletion of the 31 bp fragment between -1153 and -1122 decreased transcription down to about $60\%$. This fragment contains a functional API binding site. In addition, deletion of the 129 bp region between -901 and -772 further decreased transcription. The latter region has a functional AP2 binding site. Using a DRRF_AP1 (bases -1153 to -1121) probe, a specific retarded band was observed, and the unlabeled AP1 consensus competitor could effectively compete away this retarded band. In addition, using a DRRF_AP2 (bases -873 to -846), a specific retarded band was observed, and the unlabeled AP2 consensus competitor could effectively compete away this retarded band. The present observations suggest that Spl and DRRF regulate the DRRF promoter and that both API and AP2 also modulate this gene.
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