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THE EPIGENOME PLAYS A MAJOR ROLE IN TOMATO 3D CHROMATIN ORGANIZATION

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Solanum lycopersicum

PROVIDER: GSE243911 | GEO | 2024/08/05

REPOSITORIES: GEO

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THE EPIGENOME PLAYS A MAJOR ROLE IN TOMATO 3D CHROMATIN ORGANIZATION [RNA-seq]

Project description:Understanding the 3D genome organization in the nucleus is becoming increasingly crucial given its involvement in many processes from transcription to the integrity of the nucleus itself, which play a role in every stage of an organism's life. Beyond the linear genome defined by its nucleotide sequence, this organization is also governed by its epigenome, but how the latter controls the 3D architecture of the nucleus is poorly understood. To decipher the epigenome influence on the formation of all levels of the nuclear organization, we studied tomato mutants defective for DDM1, a chromatin remodeler determining for the constitutive heterochromatin establishment. We observed that the ddm1 mutant exhibited weakened compartmentalization with lower insulation, more inter-compartment contacts and an increase in long-range contacts. This disorganization is accompanied by a reconfiguration of the epigenome, ultimately resulting in a reprogramming of its transcriptome. By integrating all our data, we have shown that this redistribution of the epigenome is linked to the global disorganization of the nucleus notably via new interactions mediated by H3K27me3, and is also related to new interactions between genes and/or TEs which display the same epigenetic characteristics. Altogether, our results strongly suggest that epigenetic features drive the formation of distinct compartments by playing a segregating role between active and inactive chromatin, becoming an essential characteristic for the identity of genes and TEs in terms of genome organization.

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THE EPIGENOME PLAYS A MAJOR ROLE IN TOMATO 3D CHROMATIN ORGANIZATION [Hi-C]

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THE EPIGENOME PLAYS A MAJOR ROLE IN TOMATO 3D CHROMATIN ORGANIZATION [ChIP-seq]

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