Ontology highlight
ABSTRACT:
PROVIDER: PRJNA997144 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR25382600_1.fastq.gz | Fastqsanger.gz | |||
| SRR25382600_2.fastq.gz | Fastqsanger.gz | |||
| SRR25382601_1.fastq.gz | Fastqsanger.gz | |||
| SRR25382601_2.fastq.gz | Fastqsanger.gz | |||
| SRR25382593_1.fastq.gz | Fastqsanger.gz |
Items per page: 5 1 - 5 of 18 |
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2015-06-05 | E-GEOD-69625 | biostudies-arrayexpress
Project description:Gene regulation can evolve either by cis-acting local changes to regulatory element DNA sequences or by global changes to the trans-acting regulatory environment; however, the modes favored during recent human evolution are unknown. To date, studies investigating gene regulatory divergence between closely-related species have produced limited estimates on the relative contributions of cis and trans effects on DNA regulatory element activities at a global-scale. By leveraging a comparative ATAC-STARR-seq framework, we identified 10,779 regulatory regions with divergent activity in cis and 10,608 regulatory regions with divergent activity in trans between human and rhesus macaque lymphoblastoid cell lines (LCLs). This revealed substantially more trans effects than predicted and indicates trans-regulatory mechanisms play a larger role in human evolution than previously expected. We also discover that most species-specific regulatory elements (67%) diverge in both cis and trans, suggesting these two mechanisms jointly drive divergent regulatory activity in a single sequence.
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Project description:Primary piRNAs in Drosophila ovarian somatic cells arise from piRNA cluster transcripts and the 3′ UTRs of a subset of mRNAs, including Traffic jam (Tj) mRNA. However, it is unclear how these RNAs are determined as primary piRNA sources. Here, we identify a cis-acting 100-nt fragment in the Tj 3′ UTR that is sufficient for producing artificial piRNAs from unintegrated DNA. These artificial piRNAs were effective in endogenous gene transcriptional silencing. Yb, a core component of primary piRNA biogenesis center Yb bodies, directly bound the Tj-cis-element. Disruption of this interaction markedly reduced piRNA production. Thus, Yb is the trans-acting partner of the Tj-cis-element. Yb-CLIP revealed that Yb-binding correlated with somatic piRNA production but Tj-cis-element downstream sequences produced few artificial piRNAs. Thus, Yb determines primary piRNA sources by two modes of action; primary binding to cis-elements to specify substrates, and secondary binding to downstream regions to increase diversity in piRNA populations.
2015-06-05 | GSE69625 | GEO
Project description:The sfr6 mutant was identified on the basis of its failure to cold acclimate, and exhibits a marked deficiency in cold-and osmotic stress-inducible gene expression (Knight et al., 1999). We have demonstrated that genes of this type (so-called COR genes) are misregulated if they contain the DRE (drought-responsive element, or CRT; C-repeat) cis acting element in their promoter (Boyce et al., 2003). Micro-array analysis has allowed us to identify a number of COR genes misregulated in sfr6, all of which contain the DRE element. However, these experiments have indicated that other genes, not of the COR group, are also misregulated in the mutant and these do not contain the DRE element. We chose the three non-COR genes that were most clearly down-regulated in sfr6 on our previous micro-array, and identified each as of these as dark-inducible. We now seek to address two questions: (1) Can we discover more dark-regulated genes that are down-regulated in the mutant, and thus identify a second cis-acting element with which SFR6 may be interacting? (2) Do all of the non-COR genes that are misregulated in sfr6 fall into the category of dark-inducible, or is SFR6 likely to be interacting with three or more regulons?; For this micro-array experiment, we will subject sfr6 and wild type Arabidopsis, grown in a 16/8-h light/dark cycle, to darkness for 3h or 6h at ambient growth temperature. Under these conditions we see strong up-regulation of the three genes we have identified as dark-inducible, and we see clear down-regulation of expression in sfr6. References. Knight H, Veale E, Warren GJ, Knight MR (1999) The sfr6 mutation in Arabidopsis suppresses low-temperature induction of genes dependent on the CRT/DRE sequence motif. Plant Cell 11: 875-886. Boyce JM, Knight H, Deyholos M, Openshaw MR, Galbraith DW, Warren G, Knight MR (2003). The sfr6 mutant of Arabidopsis is defective in transcriptional activation via CBF/DREB1 and DREB2 and shows sensitivity to osmotic stress. Plant Journal 34: 395-406. Experimenter name = Heather Knight; Experimenter phone = 01865 275023; Experimenter fax = 01865 275074; Experimenter institute = University of Oxford; Experimenter address = Department of Plant Sciences; Experimenter address = University of Oxford; Experimenter address = South Parks Road; Experimenter address = Oxford; Experimenter zip/postal_code = OX1 3RB; Experimenter country = UK Experiment Overall Design: 4 samples were used in this experiment
2008-06-14 | E-GEOD-5710 | biostudies-arrayexpress
Project description:The sfr6 mutant was identified on the basis of its failure to cold acclimate, and exhibits a marked deficiency in cold-and osmotic stress-inducible gene expression (Knight et al., 1999). We have demonstrated that genes of this type (so-called COR genes) are misregulated if they contain the DRE (drought-responsive element, or CRT; C-repeat) cis acting element in their promoter (Boyce et al., 2003). Micro-array analysis has allowed us to identify a number of COR genes misregulated in sfr6, all of which contain the DRE element. However, these experiments have indicated that other genes, not of the COR group, are also misregulated in the mutant and these do not contain the DRE element. We chose the three non-COR genes that were most clearly down-regulated in sfr6 on our previous micro-array, and identified each as of these as dark-inducible. We now seek to address two questions: (1) Can we discover more dark-regulated genes that are down-regulated in the mutant, and thus identify a second cis-acting element with which SFR6 may be interacting? (2) Do all of the non-COR genes that are misregulated in sfr6 fall into the category of dark-inducible, or is SFR6 likely to be interacting with three or more regulons? For this micro-array experiment, we will subject sfr6 and wild type Arabidopsis, grown in a 16/8-h light/dark cycle, to darkness for 3h or 6h at ambient growth temperature. Under these conditions we see strong up-regulation of the three genes we have identified as dark-inducible, and we see clear down-regulation of expression in sfr6. References. Knight H, Veale E, Warren GJ, Knight MR (1999) The sfr6 mutation in Arabidopsis suppresses low-temperature induction of genes dependent on the CRT/DRE sequence motif. Plant Cell 11: 875-886. Boyce JM, Knight H, Deyholos M, Openshaw MR, Galbraith DW, Warren G, Knight MR (2003). The sfr6 mutant of Arabidopsis is defective in transcriptional activation via CBF/DREB1 and DREB2 and shows sensitivity to osmotic stress. Plant Journal 34: 395-406.
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