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. 1985 Nov;4(11):2971–2976. doi: 10.1002/j.1460-2075.1985.tb04031.x

Identification of a sequence element in the promoter of the Drosophila melanogaster hsp23 gene that is required for its heat activation.

R Mestril, D Rungger, P Schiller, R Voellmy
PMCID: PMC554606  PMID: 2998770

Abstract

The expression of Drosophila melanogaster hsp23-Escherichia coli beta-galactosidase hybrid genes containing different segments of the 5' non-transcribed sequence of the hsp23 gene has been examined at the RNA and protein levels in Xenopus oocytes. Transcription of the hybrid genes is initiated correctly. Mutant genes with hsp23 gene promoter segments of at least 140 bp in length are strongly heat-activated while genes with shorter promoter segments are expressed constitutively and at low levels. This maps an element required for the heat-controlled expression of the D. melanogaster hsp23 gene to a region, approximately 140 bp upstream from the start of the transcription site, which contains a sequence (CGAGAAGTT-TCGTGT) that is closely related to the one responsible for the heat regulation of the hsp70 gene. These findings demonstrate the importance of this regulatory sequence for a second hsp gene and support the notion that hsp genes are heat-regulated by a common mechanism. The functional element in the hsp23 gene promoter is located greater than 80 bp further upstream from the TATA box than the relevant element in the hsp70 gene promoter. Even though other related sequences are present further upstream and downstream from the functional element, they play at most an auxiliary role in the regulation of hsp23 gene expression.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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