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Mapping the binding regions of the cubitus interruptus (Ci) activator form

ABSTRACT: Paracrine Hedgehog (Hh) signaling regulates growth and patterning in many Drosophila organs. We mapped chromatin binding sites for Cubitus interruptus (Ci), the transcription factor that mediates outputs of Hh signal transduction, and we analyzed transcription profiles of control and mutant embryos to identify genes that are regulated by Hh. Putative targets we identified include several Hh pathway components, most previously identified targets, and many targets that are novel. Analysis of expression patterns of pathway components and target genes gave evidence of autocrine Hh signaling in the optic primordium of the embryo. And, every Hh target we analyzed that is not a pathway component appeared to be regulated by Hh in a tissue-specific manner. We present evidence that Hh-dependent tissue specificity is dependent upon transcription factors that are Hh-independent, suggesting that “pre-patterns” of transcription factors partner with Ci to make Hh-dependent gene expression position-specific. We utilized the DamID method to identify regions of CiAct methylated genomic DNA in stage 10-11 Drosophila embryos.

ORGANISM(S): Drosophila melanogaster

PROVIDER: GSE23999 | GEO | 2010/11/03

SECONDARY ACCESSION(S): PRJNA133647

REPOSITORIES: GEO

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Mapping the binding regions of the cubitus interruptus (Ci) activator form

Project description:Paracrine Hedgehog (Hh) signaling regulates growth and patterning in many Drosophila organs. We mapped chromatin binding sites for Cubitus interruptus (Ci), the transcription factor that mediates outputs of Hh signal transduction, and we analyzed transcription profiles of control and mutant embryos to identify genes that are regulated by Hh. Putative targets we identified include several Hh pathway components, most previously identified targets, and many targets that are novel. Analysis of expression patterns of pathway components and target genes gave evidence of autocrine Hh signaling in the optic primordium of the embryo. And, every Hh target we analyzed that is not a pathway component appeared to be regulated by Hh in a tissue-specific manner. We present evidence that Hh-dependent tissue specificity is dependent upon transcription factors that are Hh-independent, suggesting that “pre-patterns” of transcription factors partner with Ci to make Hh-dependent gene expression position-specific. We utilized the DamID method to identify regions of CiAct methylated genomic DNA in stage 10-11 Drosophila embryos. Comparison of DamCiAct directed methylation vs. Dam Alone background methylation using 3 replicate experiments.

2010-11-03 | E-GEOD-23999 | biostudies-arrayexpress

Mapping the binding regions of the cubitus interruptus (Ci) repressor form

Project description:Paracrine Hedgehog (Hh) signaling regulates growth and patterning in many Drosophila organs. We mapped chromatin binding sites for Cubitus interruptus (Ci), the transcription factor that mediates outputs of Hh signal transduction, and we analyzed transcription profiles of control and mutant embryos to identify genes that are regulated by Hh. Putative targets we identified include several Hh pathway components, most previously identified targets, and many targets that are novel. Analysis of expression patterns of pathway components and target genes gave evidence of autocrine Hh signaling in the optic primordium of the embryo. And, every Hh target we analyzed that is not a pathway component appeared to be regulated by Hh in a tissue-specific manner. We present evidence that Hh-dependent tissue specificity is dependent upon transcription factors that are Hh-independent, suggesting that “pre-patterns” of transcription factors partner with Ci to make Hh-dependent gene expression position-specific. We utilized the DamID method to identify regions of CiRep methylated genomic DNA in stage 10-11 Drosophila embryos. Comparison of DamCiRep directed methylation vs. Dam Alone background methylation using 3 replicate experiments.

2010-11-03 | E-GEOD-24024 | biostudies-arrayexpress

Mapping the binding regions of the cubitus interruptus (Ci) repressor form

Project description:Paracrine Hedgehog (Hh) signaling regulates growth and patterning in many Drosophila organs. We mapped chromatin binding sites for Cubitus interruptus (Ci), the transcription factor that mediates outputs of Hh signal transduction, and we analyzed transcription profiles of control and mutant embryos to identify genes that are regulated by Hh. Putative targets we identified include several Hh pathway components, most previously identified targets, and many targets that are novel. Analysis of expression patterns of pathway components and target genes gave evidence of autocrine Hh signaling in the optic primordium of the embryo. And, every Hh target we analyzed that is not a pathway component appeared to be regulated by Hh in a tissue-specific manner. We present evidence that Hh-dependent tissue specificity is dependent upon transcription factors that are Hh-independent, suggesting that “pre-patterns” of transcription factors partner with Ci to make Hh-dependent gene expression position-specific. We utilized the DamID method to identify regions of CiRep methylated genomic DNA in stage 10-11 Drosophila embryos.

2010-11-03 | GSE24024 | GEO

Identification of genetic targets of Hh signaling in Drosophila

Project description:Paracrine Hedgehog (Hh) signaling regulates growth and patterning in many Drosophila organs. We mapped chromatin binding sites for Cubitus interruptus (Ci), the transcription factor that mediates outputs of Hh signal transduction, and we analyzed transcription profiles of control and mutant embryos to identify genes that are regulated by Hh. Putative targets we identified include several Hh pathway components, most previously identified targets, and many targets that are novel. Analysis of expression patterns of pathway components and target genes gave evidence of autocrine Hh signaling in the optic primordium of the embryo. And, every Hh target we analyzed that is not a pathway component appeared to be regulated by Hh in a tissue-specific manner. We present evidence that Hh-dependent tissue specificity is dependent upon transcription factors that are Hh-independent, suggesting that “pre-patterns” of transcription factors partner with Ci to make Hh-dependent gene expression position-specific. Analysis of the expression profiles of loss of function mutantations in core components of the Hh signaling pathway. A total of 14 samples were analysed consisting of comparisons of hh-, ci-, smo-, ptc-, and Cim1-m4 (Activator) mis-expression embryos compared to wt sibling embryos.

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Hedgehog targets in the Drosophila embryo and the mechanisms that generate tissue-specific outputs of Hedgehog signaling

Project description:This SuperSeries is composed of the following subset Series: GSE23999: Mapping the binding regions of the cubitus interruptus (Ci) activator form GSE24024: Mapping the binding regions of the cubitus interruptus (Ci) repressor form GSE24028: Identification of genetic targets of Hh signaling in Drosophila Refer to individual Series

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Dachshund ChIP-seq in Drosophila Melanogaster 3rd instar imaginal eye discs

Project description:The patterning of Drosophila retina occurs both very fast and with high precision. This process is driven by the dynamic changes in signalling activity of the conserved Hedgehog (Hh) pathway, which coordinates cell fate determination, cell cycle and tissue morphogenesis. Here we show that during Drosophila retinogenesis, the retinal determination gene dachshund (dac) is not only a target of the Hh signaling pathway, but is also a modulator of its activity. Using developmental genetics techniques, we demonstrate that dac enhances Hh signaling by promoting the accumulation of the Gli transcription factor Cubitus interruptus (Ci) parallel to or downstream of fused. In the absence of dac, all Hh-mediated events associated to the morphogenetic furrow are delayed. One of the consequences is that, posterior to the furrow, dac- cells cannot activate a Roadkill-Cullin3 negative feedback loop that attenuates Hh signaling and which is necessary for retinal cells to continue normal differentiation. Therefore, dac is part of an essential positive feedback loop in the Hh pathway, guaranteeing the speed and the accuracy of Drosophila retinogenesis.

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Dachshund ChIP-seq in Drosophila Melanogaster 3rd instar imaginal eye discs

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Drosophila melanogaster

Project description:Mapping the binding regions of the cubitus interruptus (Ci) repressor form

| PRJNA133217 | ENA

Drosophila melanogaster

Project description:Mapping the binding regions of the cubitus interruptus (Ci) activator form

| PRJNA133647 | ENA