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The eukaryotic genome is packaged into chromatin, which is composed of a nucleosomal filament that coils up to form more compact structures. Chromatin exists in two main forms: euchromatin, which is relatively decondensed and enriched in transcriptionally active genes, and heterochromatin, which is condensed and transcriptionally repressed . It is widely accepted that chromatin architecture modulates DNA accessibility, restricting the access of sequence-specific, gene-regulatory, transcription factors to the genome.
View Article and Find Full Text PDFProtocol for the purification of the plastid-encoded RNA polymerase from transplastomic tobacco plants.
STAR Protoc
January 2025
National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China. Electronic address:
The plastid-encoded RNA polymerase (PEP) plays an essential role in the transcription of the chloroplast genome. Here, we present a strategy to purify the transcriptionally active protein complex from transplastomic tobacco (Nicotiana tabacum) lines in which one of the PEP core subunits is fused to an epitope tag. We describe experimental procedures for designing transformation constructs for PEP purification, selection, and analysis of transplastomic tobacco plants.
View Article and Find Full Text PDFActivation and memory of the heatshock response is mediated by Prion-like domains of sensory HSFs in Arabidopsis.
Mol Plant
January 2025
Leibniz Institut für Gemüse und Zierpflanzenbau (IGZ) e.V., Großbeeren, Germany; Institute of Biochemistry and Biology, University of Potsdam, Potsdam, Germany. Electronic address:
Plants are able to sense and remember heat stress. An initial priming heat stress enables plants to acclimate so that they are able to survive a subsequent higher temperature. The heatshock transcription factors (HSFs) play a crucial role in this process, but the mechanisms by which plants sense heat stress are not well understood.
View Article and Find Full Text PDFPharmacological Inhibition of Astrocytic Transglutaminase 2 Facilitates the Expression of a Neurosupportive Astrocyte Reactive Phenotype in Association with Increased Histone Acetylation.
Biomolecules
December 2024
Department of Anesthesiology and Perioperative Medicine, University of Rochester, 601 Elmwood Ave, Box 604, Rochester, NY 14620, USA.
Astrocytes play critical roles in supporting structural and metabolic homeostasis in the central nervous system (CNS). CNS injury leads to the development of a range of reactive phenotypes in astrocytes whose molecular determinants are poorly understood. Finding ways to modulate astrocytic injury responses and leverage a pro-recovery phenotype holds promise in treating CNS injury.
View Article and Find Full Text PDFTwo FAM134B isoforms differentially regulate ER dynamics during myogenesis.
EMBO J
January 2025
Telethon Institute of Genetics and Medicine (TIGEM), 80078, Pozzuoli, Italy.
Endoplasmic reticulum (ER) plasticity and ER-phagy are intertwined processes essential for maintaining ER dynamics. We investigated the interplay between two isoforms of the ER-phagy receptor FAM134B in regulating ER remodeling in differentiating myoblasts. During myogenesis, the canonical FAM134B1 is degraded, while its isoform FAM134B2 is transcriptionally upregulated.
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