Results 21 to 30 of about 16,530 (161)

You shall not pass! A Chromatin barrier story in plants

open access: yesFrontiers in Plant Science, 2022
As in other eukaryotes, the plant genome is functionally organized in two mutually exclusive chromatin fractions, a gene-rich and transcriptionally active euchromatin, and a gene-poor, repeat-rich, and transcriptionally silent heterochromatin.
Florent Velay   +3 more
doaj   +1 more source

TALEN outperforms Cas9 in editing heterochromatin target sites

open access: yesNature Communications, 2021
While Cas9 outperforms TALENs in euchromatin, it is less efficient in heterochromatic regions. Here the authors, using single-molecule imaging, show that Cas9 uses a less efficient search strategy compared to TALENs in these regions.
Surbhi Jain   +12 more
doaj   +1 more source

Epigenetic reactivation of LINE‐1 retrotransposon disrupts NuRD corepressor functions and induces oncogenic transformation in human bronchial epithelial cells

open access: yesMolecular Oncology, 2018
Long interspersed nuclear element‐1 (LINE‐1 or L1) reactivation is linked to poor prognosis in non‐small‐cell lung carcinoma (NSCLC), but the molecular bases of this response remain largely unknown.
Pasano Bojang Jr., Kenneth S. Ramos
doaj   +1 more source

Involvement of DNA mismatch repair in the maintenance of heterochromatic DNA stability in Saccharomyces cerevisiae. [PDF]

open access: yesPLoS Genetics, 2017
Heterochromatin contains a significant part of nuclear DNA. Little is known about the mechanisms that govern heterochromatic DNA stability. We show here that in the yeast Saccharomyces cerevisiae (i) DNA mismatch repair (MMR) is required for the ...
Basanta K Dahal   +6 more
doaj   +1 more source

Lamin B1 mapping reveals the existence of dynamic and functional euchromatin lamin B1 domains

open access: yesNature Communications, 2018
Lamina-associated domains (LADs) contact lamins in the nuclear lamina, and lamin B1 was thought to bind heterochromatic regions at the nuclear envelope.
Laura Pascual-Reguant   +13 more
doaj   +1 more source

Dispersion Profiles and Gene Associations of Repetitive DNAs in the Euchromatin of the Beetle Tribolium castaneum

open access: yesG3: Genes, Genomes, Genetics, 2018
Satellite DNAs are tandemly repeated sequences clustered within heterochromatin. However, in some cases, such as the major TCAST1 satellite DNA from the beetle Tribolium castaneum, they are found partially dispersed within euchromatin.
Josip Brajković   +5 more
doaj   +1 more source

Negative Regulators of an RNAi-Heterochromatin Positive Feedback Loop Safeguard Somatic Genome Integrity in Tetrahymena

open access: yesCell Reports, 2017
RNAi-mediated positive feedback loops are pivotal for the maintenance of heterochromatin, but how they are downregulated at heterochromatin-euchromatin borders is not well understood.
Jan H. Suhren   +5 more
doaj   +1 more source

The inheritance of histone modifications depends upon the location in the chromosome in Saccharomyces cerevisiae. [PDF]

open access: yesPLoS ONE, 2011
Histone modifications are important epigenetic features of chromatin that must be replicated faithfully. However, the molecular mechanisms required to duplicate and maintain histone modification patterns in chromatin remain to be determined.
Hiroshi Masumoto   +4 more
doaj   +1 more source

Changes in DNA, dry mass and protein content of leaf epidermis nuclei during aging of perennial monocotyledonous plants

open access: yesActa Societatis Botanicorum Poloniae, 2014
DNA, NYS and DNFB protein contents were measured cytophotometrically using the Feulgen method in the nuclei of the epidermis from. the basal zone of young leaves and from the basal and apical zones of old leaves in two perennial monocotyledonous species,
Hanna Kuran
doaj   +1 more source

Euchromatin Activity Enhances Segregation and Compaction of Heterochromatin in the Cell Nucleus

open access: yesPhysical Review X, 2022
The large-scale organization of the genome inside the cell nucleus is critical for the cell’s function. Chromatin—the functional form of DNA in cells—serves as a template for active nuclear processes such as transcription, replication, and DNA repair ...
Achal Mahajan   +4 more
doaj   +1 more source

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