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Endogenous fine-mapping of functional regulatory elements in complex genetic loci in HAP1 [4C-seq]

ABSTRACT: Endogenous fine-mapping of functional regulatory elements in complex genetic loci in HAP1 [4C-seq]

PROVIDER: PRJNA974714 | ENA |

REPOSITORIES: ENA

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Endogenous fine-mapping of functional regulatory elements in complex genetic loci in HAP1 [4C-seq]

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

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Project description:Hox genes are essential regulators of embryonic development. They are activated in a temporal sequence following their topological order within their genomic clusters. Subsequently, states of activity are fine-tuned and maintained to translate into domains of progressively overlapping gene products. While the mechanisms underlying such temporal and spatial progressions begin to be understood, many of their aspects remain unclear. We have systematically analyzed the 3D chromatin organization of Hox clusters in vivo, during their activation using high-resolution circular chromosome conformation capture (4C-seq). Initially, Hox clusters are organized as single 3D chromatin compartments decorated with bivalent chromatin marks. Their progressive transcriptional activation is associated with a dynamic bi-modal 3D organization, whereby the genes switch one after the other, from an inactive to an active 3D compartment. These local 3D dynamics occur within a larger constitutive framework of interactions within the surrounding Topological Associated Domains, which confirms previous results that regulation of this process in primarily cluster intrinsic. The local step-wise progression in time can be stopped and memorized at various body levels and hence it may accounts for the various chromatin architectures previously described at different anterior to posterior body levels for the same embryo at a later stage. Circular Chromosome Conformation Capture (4C-seq) samples from mouse ES cells and mouse embryonic samples at different stages of development. Data based on 41 biological samples.

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