DNA regions that regulate the ovarian transcriptional specificity of Drosophila yolk protein genes - PubMed
DNA regions that regulate the ovarian transcriptional specificity of Drosophila yolk protein genes
S K Logan et al. Genes Dev. 1989 Sep.
Free article
Abstract
Yolk protein genes 1 and 2 (yp1 and yp2) of Drosophila melanogaster are divergently transcribed neighboring genes. Both are transcribed in only two tissues, the ovarian follicle cells and the fat bodies of adult females. Previous work has identified a yolk protein enhancer between the genes that is sufficient to direct transcription in one of the tissues, female fat bodies. Using germ-line transformation methods, we identify two cis-acting regions with positive effects on transcription in ovaries. One, a 301-bp region located between the genes, influences both genes and is an enhancer determining the stage and cell type specificity of ovarian transcription. The other, a 105-bp region located in the first exon of yp2, acts across the yp2 promoter region to stimulate yp1 transcription in ovaries. Additional observations suggest how a single enhancer influences both promoters.
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