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The Zmiz1-Notch1 interaction induces Myc expression to drive steady state and stress thymopoiesis [ETP and DN3]

ABSTRACT: The Zmiz1-Notch1 interaction induces Myc expression to drive steady state and stress thymopoiesis [ETP and DN3]

PROVIDER: PRJNA477331 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7406350.fastq.gz	Fastqsanger.gz
	SRR7406360.fastq.gz	Fastqsanger.gz
	SRR7406370.fastq.gz	Fastqsanger.gz
	SRR7406380.fastq.gz	Fastqsanger.gz
	SRR7406351.fastq.gz	Fastqsanger.gz

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The Zmiz1-Notch1 interaction induces Myc expression to drive steady state and stress thymopoiesis [ETP and DN3]

Project description:Notch1 signaling ramps up to very high levels in order to drive CD4-CD8- double-negative (DN) thymocytes to the CD4+CD8+ double-positive (DP) stage. During this important phase of T-cell development, which is known as the DN-DP transition, it is unclear whether the Notch1 complex simply strengthens its signal output as an isolated unit or recruits cofactors to amplify its signals. We previously showed that the PIAS-like coactivator Zmiz1 is a direct and context-dependent cofactor of Notch1 in T-cell leukemia. Using conditional knockout mouse models, we show that like inactivation of Notch, inactivation of Zmiz1 impaired the DN-DP transition under steady state and stress conditions. To determine mechanism, we performed RNA-Seq on sorted early T-lineage progenitor (ETP) and DN3 cells that were deprived of Zmiz1 signals either acutely (DeltaTamCre) or chronically (DeltaMxCre). To differentiate Notch1-independent from Notch1-dependent target genes, we also performed RNA-Seq on ETP and DN3 cells that were deprived of Notch1 signals using the anti-NRR Notch1 antibody. Our data suggests that Zmiz1 selectively amplifies a subset of Notch1 target genes in DN3 cells, such as Myc. In contrast, Zmiz1 does not have these functions in ETP cells, thus indicating stage-specific roles of Zmiz1.

2018-09-21 | GSE116120 | GEO

The Zmiz1-Notch1 interaction induces Myc expression to drive steady state and stress thymopoiesis [DN3]

Project description:Notch1 signaling ramps up to very high levels in order to drive CD4-CD8- double-negative (DN) thymocytes to the CD4+CD8+ double-positive (DP) stage. During this important phase of T-cell development, which is known as the DN-DP transition, it is unclear whether the Notch1 complex simply strengthens its signal output as an isolated unit or recruits cofactors to amplify its signals. We previously showed that the PIAS-like coactivator Zmiz1 is a direct and context-dependent cofactor of Notch1 in T-cell leukemia. Using conditional knockout mouse models, we show that like inactivation of Notch, inactivation of Zmiz1 impaired the DN-DP transition under steady state and stress conditions. To determine mechanism, we performed RNA-Seq on sorted DN3 cells that were deprived of Zmiz1 signals either acutely (DeltaTamCre) or chronically (DeltaMxCre). To differentiate Notch1-independent from Notch1-dependent target genes, we also performed RNA-Seq on DN3 cells that were deprived of Notch1 signals using the anti-NRR Notch1 antibody. Our data suggests that Zmiz1 selectively amplifies a subset of Notch1 target genes in DN3 cells, such as Myc.

2018-09-21 | GSE106683 | GEO

The Zmiz1-Notch1 interaction induces Myc expression to drive steady state and stress thymopoiesis [DN3]

Project description:The Zmiz1-Notch1 interaction induces Myc expression to drive steady state and stress thymopoiesis [DN3]

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The Zmiz1-Notch1 interaction induces Myc expression to drive steady state and stress thymopoiesis

Project description:The Zmiz1-Notch1 interaction induces Myc expression to drive steady state and stress thymopoiesis

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Identification of the molecular targets of miR-185 in DN3 stage thymocytes

Project description:T cell-specific overexpression of miR-185 caused a developmental block at DN3 stage of thymopoiesis. DN3 stage thymocytes were sorted from the wild type (C57BL/6) and miR-185 Tg mice, followed by total RNA isolation.

2013-10-28 | E-GEOD-49057 | biostudies-arrayexpress

Identification of the molecular targets of miR-185 in DN3 stage thymocytes

Project description:T cell-specific overexpression of miR-185 caused a developmental block at DN3 stage of thymopoiesis.

2013-10-28 | GSE49057 | GEO

The Zmiz1-Notch1 interaction induces Myc expression to drive steady state and stress thymopoiesis

Project description:This SuperSeries is composed of the SubSeries listed below.

2018-09-21 | GSE116125 | GEO

The PIAS-like coactivator Zmiz1 directly and selectively coregulates Notch1 in T-cell development and leukemia [RNA-Seq]

Project description:The most recurrently mutated oncogene in T-cell acute lymphoblastic leukemia (T-ALL) is NOTCH1. The core Notch complex consists of an ICN protein, a Maml cofactor, and the DNA binding factor Rbpj. The known direct cofactors of Notch appear to act nonselectively, homogeneously driving Notch gene expression functions. It is unclear whether there are direct cofactors of Notch that act selectively and heterogeneously regulate ICN. We discovered that Zmiz1, a Protein Inhibitor of Activated STAT (PIAS)-like coactivator, directly bound ICN1. ChIP-Seq showed that Zmiz1 selectively co-bound only a subset of Notch-regulated enhancers. This led to hypothesize that Zmiz1 regulates only a subset of Notch1 target genes. To investigate this, we performed RNA-Seq on four 8946 cell linesin which L1601P (activated Notch1) or Zmiz1 were expressed alone or in combination. Zmiz1 induced ~10% of Notch target genes. The Notch target gene that was most strongly induced by Zmiz1 was Myc. Our data suggest that Zmiz1 selectively amplifies a subset of Notch target genes with strong amplification of Myc. RNA-Seq in a murine T-ALL cell line

2015-10-28 | E-GEOD-66145 | biostudies-arrayexpress

The PIAS-like coactivator Zmiz1 directly and selectively coregulates Notch1 in T-cell development and leukemia [ChIP-Seq]

Project description:The most recurrently mutated oncogene in T-cell acute lymphoblastic leukemia (T-ALL) is NOTCH1. The core Notch complex consists of an ICN protein, a Maml cofactor, and the DNA binding factor Rbpj. The known direct cofactors of Notch appear to act nonselectively, homogeneously driving Notch gene expression functions. It is unclear whether there are direct cofactors of Notch that act selectively and heterogeneously regulate ICN. We discovered that Zmiz1, a Protein Inhibitor of Activated STAT (PIAS)-like coactivator, directly bound ICN1. In order to determine whether this interaction occured at chromatin, we performed ChIP-Seq. We identified significant overlap between ICN1, Rbpj, and Zmiz1 peaks. 75% of overlapping ICN1/Rbpj peaks overlapped with Zmiz1 (HA) peaks (273 peaks). The size of Zmiz1 (HA) peaks had moderate correlation with the size of Rbpj and ICN1 peaks. Like Rbpj and ICN1 peaks, Zmiz1 (HA) peaks were associated with activating H3K27ac, H3K4me1, and H3K4me3 chromatin marks and were devoid of repressive H3K27me3 marks. These data suggest that Zmiz1 is a selective Notch regulator. It co-binds only a subset of ICN1 and Rbpj-regulated sites. Zmiz1, ICN1, Rbpj, histone mehylation ChIP-Seq in murine T-ALL cell line

2015-10-28 | E-GEOD-66146 | biostudies-arrayexpress

The PIAS-like coactivator Zmiz1 directly and selectively coregulates Notch1 in T-cell development and leukemia [RNA-Seq]

2015-10-28 | GSE66145 | GEO