An Analysis of Two Tandem Promoters of the Drosophila purple Gene

Gumhee Baek, Sangsoon Yoon, Min Jae Jeon, Sangyoon Han, Jeongbin Yim, Kwanghee Baek, Jaeseung Yoon, Kyuhyung Han

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


We have analyzed two tandem promoters, separated by only about 400 bp, of the purple (pr) gene of Drosophila melanogaster, by fusing them to the firefly luciferase reporter gene and employing a transient expression assay with Drosophila S2 cells. Both the distal promoter and the proximal promoter were found to function in S2 cells and an about 700 bp long region (-270 to +421), containing both promoters, was sufficient to effect maximal promoter activity. When the two promoters were analyzed separately, the distal promoter was found to be much stronger in its function than the proximal promoter. At least three different kinds of cis elements near the transcription start site appear to play crucial roles in driving constitutive expression from the distal promoter. On the other hand, only a single cis element, which may play a role in tissue-specific expression, appears to be important for the activity of the proximal promoter in S2 cells. We propose that the clustering of important cis elements near the transcription start sites may be responsible for the selective regulation of the two tandem promoters.

Original languageEnglish (US)
Pages (from-to)685-690
Number of pages6
JournalMolecules and Cells
Issue number6
StatePublished - Dec 31 1998
Externally publishedYes


  • Drosophila melanogaster
  • Promoter
  • Purple
  • S2 Cell
  • Transfection

ASJC Scopus subject areas

  • Molecular Biology
  • Cell Biology


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