OBJECTIVE The purpose of this study was to investigate the influence of AMP-activated protein kinase (AMPK) activation on protein acetylation and glycolysis in postmortem muscle to better understand the mechanism by which AMPK regulates postmortem glycolysis and meat quality. METHODS A total of 32 mice were randomly assigned to four groups and intraperitoneally injected with 5-Aminoimidazole-...

Histone acetylation and methylation are linked to a variety of nuclear activities, most notably transcriptional regulation. Both synergistic and antagonistic relationships between these two modifications have been reported in different systems. Here we show that the budding yeast histone H4 arginine 3 (R3) methyltransferase Hmt1p binds acetylated histones H3 and H4, and importantly, that acetyl...

BACKGROUND Aberrant histone acetylation has been observed in carcinogenesis and cellular transformation associated with arsenic exposure; however, the molecular mechanisms and cellular outcomes of such changes are poorly understood. OBJECTIVE We investigated the impact of tolerated and toxic arsenic trioxide (As2O3) exposure in human embryonic kidney (HEK293T) and urothelial (UROtsa) cells to...

Histone acetylation and deacetylation are associated with transcriptional activity and the formation of constitutively silent heterochromatin. Increasingly, histone acetylation is also implicated in other chromosome transactions, including replication and segregation. We have cloned the only Schizosaccharomyces pombe MYST family histone acetyltransferase genes, mst1(+) and mst2(+). Mst1p, but n...

We have monitored histone acetylation during conjugation of the ciliated protozoan Tetrahymena thermophila using antibodies against the tetraacetylated form of H4 histone (Pfeffer, U., N. Ferrari, and G. Vidali. 1986. J. Biol. Chem. 261:2496-2498). During meiosis, the three prezygotic divisions, fertilization, and the first postzygotic division, micronuclei, do not contain highly acetylated for...

BACKGROUND Rubinstein-Taybi syndrome (RSTS) is a congenital neurodevelopmental disorder defined by postnatal growth deficiency, characteristic skeletal abnormalities and mental retardation and caused by mutations in the genes encoding for the transcriptional co-activators with intrinsic lysine acetyltransferase (KAT) activity CBP and p300. Previous studies have shown that neuronal histone acety...

histone deacetylases (hdacs) are the enzymes causing deacetylation of histone and non-histone substrates. histone deacetylase inhibitors (hdis) are a family of drugs eliminating the effect of hdacs in malignant cells via inhibition of hdacs. due to extensive effects upon gene expression through interference with fusion genes and transcription factors, hdacs cause proliferation and migration of ...

AMP-activated protein kinase (AMPK) is an energy sensor and master regulator of metabolism. AMPK functions as a fuel gauge monitoring systemic and cellular energy status. Activation of AMPK occurs when the intracellular AMP/ATP ratio increases and leads to a metabolic switch from anabolism to catabolism. Metformin, widely used for diabetes type 2 treatment, activates AMPK by inhibiting mitochon...

OBJECTIVE Histone acetylation has been shown to be involved in expression of a restricted set of cellular genes including various proinflammatory molecules. We aimed to investigate the relationship between histone acetylation and atherosclerosis. METHODS AND RESULTS In low-density lipoprotein (LDL) receptor-deficient (Ldlr(-/-)) mice fed an atherogenic diet for 4 or 8 weeks, trichostatin A (T...

Neurospora crassa utilizes DNA methylation to inhibit transcription of heterochromatin. DNA methylation is controlled by the histone methyltransferase DIM-5, which trimethylates histone H3 lysine 9, leading to recruitment of the DNA methyltransferase DIM-2. Previous work demonstrated that the histone deacetylase (HDAC) inhibitor trichostatin A caused a reduction in DNA methylation, suggesting i...