Reference: Roshina MP, et al. (2008)
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Abstract
The 1.25-kb heterochromatic Stellate repeats of Drosophila melanogaster are capable of stably persisting in transgenic constructs and silencing the white reporter gene (mosaic position effect variegation). This system reveals an unusual form of silencing, which is insensitive to known modifiers of position effect variegation. The unusual form of silencing was studied with yeast Saccharomyces cerevisiae, a simple eukaryotic model. To be transferred into yeast cells, the D. melanogaster Stellate repeats were cloned in the pYAC4 centromeric vector (CEN4, URA3, TRP1, HIS3). The HIS3 and/or URA3 genes could be inactive in plasmids consisting of pYAC4 and the Stellate insert in yeast cells. Deletion of D. melanogaster DNA from the plasmid was found to activate the URA3 and HIS3 genes. It was assumed that the genes were repressed rather than damaged in the presence of the Stellate repeats and that a new form of gene silencing was revealed in S. cerevisiae.
- Reference Type
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Journal Article |
Research Support, Non-U.S. Gov't
- Authors
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Roshina MP,
Loginova NN,
Devin AB,
Gvozdev VA
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