Fredy Barnèche

GH1-HMGA proteins restrict RNA-directed DNA methylation and antagonize linker histone H1 at euchromatic transposable elements

The paper shows GH1-HMGA proteins restrict RdDM at euchromatic TEs by limiting siRNA and competing with H1 for chromatin binding.

Centromeric origin of megabase-scale Arabidopsis interstitial telomeric repeat domains

The paper identifies centromeres as a source of telomeric sequences in Arabidopsis, showing ITR domains arise from centromeres through amplification and adopt a distinct chromatin state.

Genome-scale transcriptome augmentation during Arabidopsis thaliana photomorphogenesis

The paper identifies a two-fold transcriptome expansion in Arabidopsis thaliana during photomorphogenesis, with most differentially expressed genes upregulated, and reveals the role of HY5 in light-mediated gene regulation.

Entry and exit of Fragilariopsis cylindrus diatoms from the polar night: evidence for chromatin-mediated genome control

This study examines how the polar diatom Fragilariopsis cylindrus regulates its epigenome during the polar night, showing stable repression of transposable elements through H3K27me3 and DNA methylation.

Linker Histones Enhance Robustness in Diurnal Transcription Dynamics.

This study shows that linker histone H1 in Arabidopsis thaliana maintains rhythmic gene expression by modulating chromatin structure and transcriptional dynamics across the diurnal cycle.

The UBP5 histone H2A deubiquitinase counteracts PRC2-mediated repression to regulate Arabidopsis development and stress responses

This study identifies UBP5 as an interactor of PRC2 in Arabidopsis, showing it regulates development and stress responses by counteracting PRC2-mediated repression through H2Aub erasure.

A layer cake model for plant and metazoan chromatin

The paper compares 3D chromatin organization across species to propose a layer cake model that refines the two compartments model by identifying distinct chromatin layers.

Histone H1 protects telomeric repeats from H3K27me3 invasion in Arabidopsis

This paper shows that H1 prevents H3K27me3 accumulation at telomeres and ITRs in Arabidopsis by restricting DNA accessibility to TRB proteins, while promoting PRC2 activity at genes.

Linker histones regulate fine-scale chromatin organization and modulate developmental decisions in Arabidopsis

This study shows that H1 linker histones in Arabidopsis regulate fine-scale chromatin organization and developmental decisions, affecting processes like root hair production and flowering.