Transcriptomics

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3D structures of individual mammalian genomes reveal principles of nuclear organization


ABSTRACT: The folding of genomic DNA from the beads-on-a-string like structure of nucleosomes into higher order assemblies is thought to be critically linked to nuclear processes, but it is unclear to what degree it is a cause or consequence of function. We have calculated the first 3D structural models of entire mammalian genomes using data from a new chromosome conformation capture protocol that allows us to first image and then process single cells. This has allowed us to study the folding of chromosomes down to a sub-100 kb scale. We show that the structures of individual topological-associated domains, chromosomes, and the way they pack together, varies very substantially from cell-to-cell. However, in all cells we find a consistent large-scale organization of compartments, with active enhancers and promoters clustering near inter-chromosomal interfaces, suggesting that nuclear processes such as transcription may drive chromosome and genome folding.

ORGANISM(S): Mus musculus

PROVIDER: GSE80280 | GEO | 2017/03/07

SECONDARY ACCESSION(S): PRJNA318485

REPOSITORIES: GEO

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