Results 91 to 100 of about 45,751 (265)

The true story of Yeti, the "abominable" heterochromatic gene of drosophila melanogaster [PDF]

, 2019
The Drosophila Yeti gene (CG40218) was originally identified by recessive lethal mutation and subsequently mapped to the deep pericentromeric heterochromatin of chromosome 2. Functional studies have shown that Yeti encodes a 241 amino acid protein called
Cuticone, Stefano, DELLE MONACHE, Francesca, Dimitri, Patrizio, Ferreri, Diego, Messina, Giovanni, Prozzillo, Yuri   +5 more
core   +1 more source

The Influence of Spatial Variation in Chromatin Density Determined by X-ray Tomograms on the Time to Find DNA Binding Sites [PDF]

, 2013
In this work we examine how volume exclusion caused by regions of high chromatin density might influence the time required for proteins to find specific DNA binding sites. The spatial variation of chromatin density within mouse olfactory sensory neurons is determined from soft X-ray tomography reconstructions of five nuclei.
arxiv   +1 more source

Inactivation of Histone Chaperone HIRA Unmasks a Link Between Normal Embryonic Development of Melanoblasts and Maintenance of Adult Melanocyte Stem Cells

Aging Cell, EarlyView.
Expression of HIRA in embryonic melanoblasts is required for proper epigenetic programing and lineage differentiation. Although HIRA deficiency results in a mild phenotype at birth and young adulthood, the melanocytic lineage is sensitive to proliferative challenge, prone to loss of stem cells and dramatically accelerated hair greying in later life ...
Farah Jaber‐Hijazi, Rouven Arnold, Karthic Swaminathan, Kathryn Gilroy, Alexander T. Wenzel, Anthony Lagnado, Kristina Kirschner, Neil Robertson, Claire Reid, Neil Fullarton, Jeff Pawlikowski, Taranjit Singh Rai, Ian Baranyk, Christina Huan Shi, Kevin Y. Yip, Karen Blyth, Jill P. Mesirov, Melissa L. Harris, João F. Passos, Laura M. Machesky, Peter D. Adams   +20 more
wiley   +1 more source

Constitutive heterochromatin reorganization during somatic cell reprogramming [PDF]

The EMBO Journal, 2011
Induced pluripotent stem (iPS) cell reprogramming is a gradual epigenetic process that reactivates the pluripotent transcriptional network by erasing and establishing repressive epigenetic marks. In contrast to loci-specific epigenetic changes, heterochromatin domains undergo epigenetic resetting during the reprogramming process, but the effect on the ...
Fussner, Eden, Djuric, Ugljesa, Strauss, Mike, Hotta, Akitsu, Perez-Iratxeta, Carolina, Lanner, Fredrik, Dilworth, F Jeffrey, James Ellis, Bazett-Jones, David   +8 more
openaire   +4 more sources

Comparative analyses of SUV420H1 isoforms and SUV420H2 reveal differences in their cellular localization and effects on myogenic differentiation. [PDF]

PLoS ONE, 2010
BACKGROUND:Methylation of histone H4 on lysine 20 plays critical roles in chromatin structure and function via mono- (H4K20me1), di- (H4K20me2), and trimethyl (H4K20me3) derivatives.
Leanna W K Tsang, Ninghe Hu, D Alan Underhill   +2 more
doaj   +1 more source

Pre-implantation mouse embryos cultured In vitro under different oxygen concentrations show altered ultrastructures [PDF]

, 2020
Assisted Reproductive Technologies routinely utilize different culture media and oxygen (O2) concentrations to culture human embryos. Overall, embryos cultured under physiological O2 tension (5%) have improved development compared to embryos cultured ...
Antonouli, S, Belli, M, Macchiarelli, G, Nottola, Sa, Palmerini, Mg, Rinaudo, P, Ruggeri, E   +6 more
core   +1 more source

Polymer Modelling Predicts Chromosome Reorganisation in Senescence [PDF]

Cell Reports 28, 3212 (2019), 2020
Lamina-associated domains (LADs) cover a large part of the human genome and are thought to play a major role in shaping the nuclear architectural landscape. Here, we perform polymer simulations, microscopy and mass spectrometry to dissect the roles played by heterochromatin- and lamina-mediated interactions in nuclear organisation.
arxiv  

hTERT Increases TRF2 to Induce Telomere Compaction and Extend Cell Replicative Lifespan

Aging Cell, EarlyView.
In contrast to the dogma that a subset of short telomeres initiates senescence, hTERT variants unable to maintain telomere length block senescence by stabilizing TRF2 via inhibiting upstream E3 ubiquitin ligases. This noncanonical hTERT function also compacts telomeres and blocks senescence‐associated DNA damage signaling. Cancer cells expressing hTERT
Nancy Adam, Yang Yang, Mahbod Djamshidi, Sara Seifan, Nicholas S. Y. Ting, Joel Glover, Nicolas Touret, Paul M. K. Gordon, K. V. Vineetha Warriyar, Hokan Krowicki, Christine Kim Garcia, Sharon A. Savage, Aaron A. Goodarzi, Duncan M. Baird, Tara L. Beattie, Karl Riabowol   +15 more
wiley   +1 more source

Quantitative analysis of chromatin compaction in living cells using FLIM-FRET [PDF]

, 2009
FRET analysis of cell lines expressing fluorescently tagged histones on separate nucleosomes demonstrates that variations in chromosome compaction occur during ...
Angus I. Lamond, Bastiaens, Belmont, Choi, Cushman, David G. Norman, David Llères, Elgin, Förster, Gerlich, Gilbert, Grewal, Grunstein, Huisinga, Huynh, John James, Kanda, Keppler, Kimura, Kimura, Kruhlak, Lakowicz, Lippincott-Schwartz, Llères, Luger, Luger, Luger, Misteli, Mora-Bermúdez, Mora-Bermúdez, Perche, Phair, Platani, Rhodes, Robinett, Sam Swift, Shaner, Shaner, Shav-Tal, Strukov, Swedlow, Taddei, Telford, Treanor, Tremethick, Trinkle-Mulcahy, Turner, Tóth, Vagnarelli, van Munster, Wallrabe, Wolffe, Wouters   +52 more
core   +4 more sources

Non‐canonical nitric oxide signalling and DNA methylation: Inflammation induced epigenetic alterations and potential drug targets

British Journal of Pharmacology, EarlyView.
Abstract DNA methylation controls DNA accessibility to transcription factors and other regulatory proteins, thereby affecting gene expression and hence cellular identity and function. As epigenetic modifications control the transcriptome, epigenetic dysfunction is strongly associated with pathological conditions and ageing.
Christopher H. Switzer
wiley   +1 more source