Classical histone deacetylases (HDACs) are enzymes that can hydrolytically cleave acetyl-Lys in histones and other proteins and serve as established drug targets in some forms of cancer. Class I HDACs 1-3 typically exist in a range of multiprotein complexes inside cells and show distinct biological functions in modulating gene expression. In recent years, it has become possible to purify and analyze the structure and enzymatic properties of several of these HDAC complexes, including CoREST, MiDAC, NuRD, Sin3, SMRT, MIER, and RERE. Here, we summarize what is experimentally established and/or computationally predicted about the structure of these complexes to describe their particular catalytic activities and site-specificities with modified nucleosome substrates.
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http://dx.doi.org/10.1016/j.cbpa.2022.102179 | DOI Listing |
Front Cell Neurosci
December 2024
Institute of Pharmaceutical Technology, Goethe University Frankfurt, Frankfurt am Main, Germany.
The pathophysiological role of Aβ oligomers in the onset of Alzheimer's disease (AD) is heavily disputed, pivoting research toward investigating mixed oligomers composed of Aβ and Aβ, which is more abundant but less aggregation-prone. This study investigates Aβ:Aβ oligomers in different ratios, examining their adverse effects on endothelial cells, neurons, astroglia, and microglia, as well as in a human blood-brain barrier (BBB) model. Combining label-free Raman microscopy with complementary imaging techniques and biochemical assays, we show the prominent impact of Aβ on Aβ fibrillation, suggesting an inhibitory effect on aggregation.
View Article and Find Full Text PDFSci Rep
December 2024
Entomology department, Faculty of Science, Ain Shams University, Cairo, Egypt.
Photosensitizing compounds are eco-friendly promising organic dyes for managing insect pests without facing the risk of resistance. The photodynamic efficacy of four Photosensitizing compounds (rose Bengal, rhodamine B, methylene blue and methyl violet) was monitored against the third larval instar of Spodoptera littoralis (Boisduval), after exposure to sunlight. The LC values of the four compounds; rose Bengal, rhodamine B, methylene blue and methyl violet recorded 0.
View Article and Find Full Text PDFPaired-class homeodomain transcription factors (HD TFs) play essential roles in vertebrate development, and their mutations are linked to human diseases. One unique feature of paired-class HD is cooperative dimerization on specific palindrome DNA sequences. Yet, the functional significance of HD cooperative dimerization in animal development and its dysregulation in diseases remain elusive.
View Article and Find Full Text PDFJ Clin Endocrinol Metab
December 2024
Medizinische Klinik und Poliklinik IV, Innenstadt Klinikum der Universität München, München, Germany.
Introduction: Patients with Cushing's syndrome (CS) suffer from metabolic and cardio-vascular comorbidities caused by hypercortisolism. The human gut microbiome responds to different pathological conditions. Aim of our study was to analyze the impact of chronic endogenous cortisol excess on the gut microbiome.
View Article and Find Full Text PDFPLoS Comput Biol
December 2024
HUN-REN Institute of Experimental Medicine, Budapest, Hungary.
Finding optimal parameters for detailed neuronal models is a ubiquitous challenge in neuroscientific research. In recent years, manual model tuning has been gradually replaced by automated parameter search using a variety of different tools and methods. However, using most of these software tools and choosing the most appropriate algorithm for a given optimization task require substantial technical expertise, which prevents the majority of researchers from using these methods effectively.
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