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TranscriptomicsGenes expression in case of PEV caused by chromosomal rearrangement
Heterochromatic position effect variegation (PEV) is the epigenetic disruption of genes expression near the new-formed eu-heterochromatic border. We characterized the inversion In(2)A4, demonstrating cis-acting PEV as well as trans-inactivation of the reporter transgenes on the opposite normal chrom...
ORGANISM(S): Drosophila melanogaster 
2015-10-25 | E-GEOD-71842 | biostudies-arrayexpress
GenomicsImpact of nuclear Piwi elimination on chromatin state in Drosophila melanogaster ovaries
The piRNA-interacting Piwi protein is involved in transcriptional silencing of transposable elements in ovaries of D. melanogaster. Here we characterized the genome-wide effect of nuclear Piwi elimination on the presence of the heterochromatic H3K9me3 mark and HP1a, as well as on the transcription-a...
ORGANISM(S): Drosophila melanogaster 
2014-05-19 | E-GEOD-56347 | biostudies-arrayexpress
TranscriptomicsChanges in gene expression in fruitfly ovaries in mutants affecting components of rasiRNA system
rasiRNA (rasiRNAs, repeat-associated short interfering RNAs) system is a mechanism of silencing of mobile element transpositions in germline of a number of species including Drosophila melanogaster. rasiRNA itself is a short RNAs which participate in transposon transcription repression and mRNA deg...
ORGANISM(S): Drosophila melanogaster 
2013-03-11 | E-GEOD-40768 | biostudies-arrayexpress
TranscriptomicsDe novo piRNA cluster formation in the Drosophila germline triggered by transgenes containing a transcribed transposon fragment
PIWI interacting RNAs (piRNAs) provide defense against transposable element (TE) expansion in the germline of metazoans. piRNAs are processed from the transcripts encoded by specialized heterochromatic clusters enriched in damaged copies of transposons. How these regions are recognized as a source o...
ORGANISM(S): Drosophila melanogaster 
2013-04-25 | E-GEOD-41780 | biostudies-arrayexpress
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