SPI-1 transcription factor ChIP-Seq
Ontology highlight
ABSTRACT:
PROVIDER: PRJEB11507 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| ERR1094770.fastq.gz | Fastqsanger.gz | |||
| ERR1094771.fastq.gz | Fastqsanger.gz | |||
| ERR1094772.fastq.gz | Fastqsanger.gz | |||
| ERR1094773.fastq.gz | Fastqsanger.gz | |||
| ERR1094774.fastq.gz | Fastqsanger.gz |
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Project description:We determined the genome-wide binding of the ETS transcription factor Spi-C with target genes using chromatin immunoprecipitation and next generation sequencing (ChIP-seq)
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Project description:Acute leukemia are characterized by deregulation of transcriptional networks that control the lineage specificity of gene expression. The aberrant overexpression of the Spi-1/PU.1 transcription factor leads to erythroleukemia. To determine how Spi-1 mechanistically influences the transcriptional program, we combined a ChIP-seq analysis with transcriptional profiling in cells from an erythroleukemic mouse model. We show that Spi-1 displays a selective DNA-binding that does not often cause transcriptional modulation. We report that Spi-1 controls transcriptional activation and repression through distinct Spi-1 recruitment to chromatin. We revealed several parameters impacting on Spi-1-mediated transcriptional activation. Gene activation is facilitated by Spi-1 occupancy close to transcriptional starting site of genes devoid of CGIs. Moreover, in those regions Spi-1 acts by binding to multiple motifs tightly clustered and with similar orientation. Finally, in contrast to the myeloid and lymphoid B cells in which Spi-1 exerts a physiological activity, in the erythroleukemic cells, lineage-specific cooperating factors do not play a prevalent role in Spi-1-mediated transcriptional activation. Thus, our work describes a new mechanism of gene activation through clustered site occupancy of Spi-1 particularly relevant in regard to the strong expression of Spi-1 in the erythroleukemic cells.
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Project description:Acute leukemia are characterized by deregulation of transcriptional networks that control the lineage specificity of gene expression. The aberrant overexpression of the Spi-1/PU.1 transcription factor leads to erythroleukemia. To determine how Spi-1 mechanistically influences the transcriptional program, we combined a ChIP-seq analysis with transcriptional profiling in cells from an erythroleukemic mouse model. We show that Spi-1 displays a selective DNA-binding that does not often cause transcriptional modulation. We report that Spi-1 controls transcriptional activation and repression through distinct Spi-1 recruitment to chromatin. We revealed several parameters impacting on Spi-1-mediated transcriptional activation. Gene activation is facilitated by Spi-1 occupancy close to transcriptional starting site of genes devoid of CGIs. Moreover, in those regions Spi-1 acts by binding to multiple motifs tightly clustered and with similar orientation. Finally, in contrast to the myeloid and lymphoid B cells in which Spi-1 exerts a physiological activity, in the erythroleukemic cells, lineage-specific cooperating factors do not play a prevalent role in Spi-1-mediated transcriptional activation. Thus, our work describes a new mechanism of gene activation through clustered site occupancy of Spi-1 particularly relevant in regard to the strong expression of Spi-1 in the erythroleukemic cells. Chromatin immunoprecipitations of Spi-1, H3K36me3, RNApolII,mouse IgG followed by sequencing were performed on spleen-derived erythroleukemic cells of spi-1 transgenic mice. In case of Spi-1, reads obtained from the two different mice represent biological replicates and were merged for bioinformatic analysis. Input DNA from each ChIP experiments have been pooled and sequenced as one control.
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Project description:- transcription factor interferon regulatory factor 4 (IRF4) = crucial transcription factor for different immune cells, incl pro-inflammatory Th17 and anti-inflammatory Treg cells
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