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Regulation of heat-shock genes: a DNA sequence upstream of Drosophila hsp70 genes is essential for their induction in monkey cells

, : Regulation of heat-shock genes: a DNA sequence upstream of Drosophila hsp70 genes is essential for their induction in monkey cells. Embo Journal 1(10): 1279-1285

Heat-shock genes coding for heat-shock protein 70 (HSP70) in Drosophila melanogaster were subcloned into an SV40/plasmid recombinant capable of replication in permissive monkey COS cells. Following transfection of COS cells, no significant amount of Drosophila hsp70 RNA was detected at 37 degrees C. In contrast, a heat-shock at 43 degrees C or arsenite poisoning at 37 degrees C induced the massive production of Drosophila hsp70 RNA of correct size and faithful 5' ends. After heat-shock, the efficiency of hsp70 transcription in COS cells containing 2-4 X 10(4) gene copies was found to be 15-30% of that measured in Drosophila, on a per gene basis. By testing a series of 5' deletion mutants in this inducible transcription assay it was found that a sequence less than 70 bp long, directly upstream of the hsp70 gene, was essential for the heat or arsenite induction of transcription.

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Accession: 044174318

PMID: 6821333

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