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GenomicsLeo1 is a Global Regulator of Heterochromatin Cis-spreading
Domains of heterochromatin play important roles in the maintenance and regulation of eukaryotic genomes. However, the repressive nature of heterochromatin combined with its propensity to self-propagate necessitates the existence of robust mechanisms that limit heterochromatin spreading and thereby a...
ORGANISM(S): Schizosaccharomyces pombe 
2015-05-22 | E-GEOD-61688 | biostudies-arrayexpress
TranscriptomicsRelics of repeat-induced point mutation direct heterochromatin formation in Neurospora crassa
Both RNAi-dependent and -independent mechanisms have been implicated in the establishment of heterochromatin domains, which may be stabilized by feedback loops involving chromatin proteins and modifications of histones and DNA. Neurospora crassa sports features of heterochromatin found in higher eu...
ORGANISM(S): Neurospora crassa 
2010-05-15 | E-GEOD-12690 | biostudies-arrayexpress
TranscriptomicsArgonaute Surveillance and Dicer-Independent priRNAs TriggerRNAi and Heterochromatin Formation
The assembly of fission yeast pericentromeric heterochromatin and generation of small interfering RNAs (siRNAs) from noncoding centromeric transcripts are mutually dependent processes. How this interdependent positive feedback loop is first triggered is a fundamental unanswered question. Here we sho...
ORGANISM(S): Schizosaccharomyces pombe 
2010-02-23 | E-GEOD-19734 | biostudies-arrayexpress
TranscriptomicsMolecular landscape of modified histones in Drosophila heterochromatin
The aim of this study is to analyze the distribution of the modified histones in and around peri-centromeric heterochromatin at high resolutions for understanding the molecular nature of the heterochromatic genes and euchromatin-heterochromatin transition. Since heterochromatin is repeat-rich, strin...
ORGANISM(S): Drosophila melanogaster 
2010-06-29 | E-GEOD-7839 | biostudies-arrayexpress
TranscriptomicsNuclear retention of fission yeast dicer is a prerequisite for RNAi-mediated heterochromatin assembly
RNAseIII ribonucleases act at the heart of RNA silencing pathways by processing precursor RNAs into mature microRNAs and siRNAs. In the fission yeast Schizosaccharomyces pombe, siRNAs are generated by the RNAseIII enzyme Dcr1 and are required for heterochromatin formation. In this study, we have ana...
ORGANISM(S): Schizosaccharomyces pombe 
2010-02-16 | E-GEOD-18582 | biostudies-arrayexpress
TranscriptomicsMechanism for full-length RNA processing over intragenic heterochromatin
Mechanism for full-length RNA processing over intragenic heterochromatin
ORGANISM(S): Arabidopsis thaliana 
2014-04-22 | E-MTAB-4475 | biostudies-arrayexpress
GenomicsZscan4 mediates transient remodeling and transcriptional burst of heterochromatin in mouse embryonic stem cells
This SuperSeries is composed of the SubSeries listed below. Repetitive sequences such as telomeres, centromeres, and retrotransposons are packed in permanently-condensed and transcriptionally-silenced heterochromatin, whose maintenance is critical for the genome stability. We have recently found th...
ORGANISM(S): Mus musculus 
2015-09-10 | E-GEOD-51682 | biostudies-arrayexpress
GenomicsA transcription factor based mechanism for mouse heterochromatin formation
We identify Pax3 and Pax9 transcription factors (TFs) as important regulators of mouse heterochromatin. Simultaneous depletion of these factors results in loss of H3K9me3 from Major Satellite repeats and dramatic transcript overexpression. H3K9me3 enrichment at intergenic major satellite repeats is ...
ORGANISM(S): Mus musculus 
2012-09-16 | E-GEOD-40086 | biostudies-arrayexpress
GenomicspiRNA production requires heterochromatin formation in Drosophila
Here, we analyzed H3K9me3 derived from wild type ovarian tissue. Here we show that deposition of histone 3 lysine 9 by the methyltransferase dSETDB1 (egg) is required for piRNA cluster transcription. In the absence of dSETDB1, cluster precursor transcription collapses in germline and somatic gonadal...
ORGANISM(S): Drosophila melanogaster 
2011-09-08 | E-GEOD-30157 | biostudies-arrayexpress
GenomicsThe Histone Variant H2A.W Defines Heterochromatin and Promotes Chromatin Condensation in Arabidopsis
Histone variants play crucial roles in gene expression, genome integrity and chromosome segregation. However, to what extent histone variants control chromatin architecture remains largely unknown. Here, we show that the previously uncharacterized histone variant H2A.W plays a crucial role in conde...
ORGANISM(S): Arabidopsis thaliana 
2014-07-05 | E-GEOD-50942 | biostudies-arrayexpress
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