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Chromatin Fiber Invasion and Nucleosome Displacement by the Rap1 Transcription Factor

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Rhythmic and clock-dependent chromatin loops regulate circadian gene expression

Jérôme Mermet

In mammals the circadian clock drives daily behavioural and physiological changes that resonate with environmental cues, which can be observed, for example, in the intricate timing of rest during the night and activity during the day in humans. The circadi ...

EPFL2017

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Isogenic cells in a common environment present a large degree of heterogeneity in gene expression. Part of this variability is attributed to transcriptional bursting: the stochastic activation and inactivation of promoters that leads to the discontinuous p ...

Royal Society of Chemistry2017

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Brown adipocytes regulate energy expenditure via mitochondrial uncoupling, which makes them attractive therapeutic targets to tackle obesity. However, the regulatory mechanisms underlying brown adipogenesis are still poorly understood. To address this, we ...

Springer Nature2017

Rhythmic modulation of transcriptional burst frequency in circadian gene promoters

Damien Lionel Nicolas

Isogenic cells sharing a common environment present a large degree of heterogeneity in gene expression, and stochasticity inherent to transcription substantially participates in this cell-to-cell variability. Notably, a majority of mammalian genes are tran ...

EPFL2017

Single-molecule kinetic analysis of HP1-chromatin binding reveals a dynamic network of histone modification and DNA interactions

Vassily Hatzimanikatis, Georg Fantner, Beat Fierz, Sandrine Madeleine Suzanne Georgeon, Daniel Robert Weilandt, Oliver Hantschel, Louise Catherine Bryan, Pascal Damian Odermatt, Sinan Kilic, Andreas Linus Bachmann, Carolin Christine Lechner

Chromatin recruitment of effector proteins involved in gene regulation depends on multivalent interaction with histone post-translational modifications (PTMs) and structural features of the chromatin fiber. Due to the complex interactions involved, it is c ...

Oxford University Press (OUP)2017

Genomic targets and molecular partners of the chromatin regulator KAP1

Annamaria Kauzlaric

KAP1 is an enigmatic regulatory protein, first described some twenty years ago, shown to be involved in multiple and diverse cellular functions. Specifically, it mediates tasks critical to cell growth and differentiation, pluripotency, apoptosis, gene sile ...

EPFL2017

The chromatin remodeling factor ISW-1 integrates organismal responses against nuclear and mitochondrial stress

Johan Auwerx, Maroun Bou Sleiman

Age-associated changes in chromatin structure have a major impact on organismal longevity. Despite being a central part of the ageing process, the organismal responses to the changes in chromatin organization remain unclear. Here we show that moderate dist ...

Nature Publishing Group2017

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The 'acidic patch' is a highly electronegative cleft on the histone H2A-H2B dimer in the nucleosome. It is a fundamental motif for protein binding and chromatin dynamics, but the cellular impact of targeting this potentially therapeutic site with exogenous ...

2017

Influence of Rotational Nucleosome Positioning on Transcription Start Site Selection in Animal Promoters

Giovanna Ambrosini, Philipp Bucher, René Dreos

The recruitment of RNA-Pol-II to the transcription start site (TSS) is an important step in gene regulation in all organisms. Core promoter elements (CPE) are conserved sequence motifs that guide Pol-II to the TSS by interacting with specific transcription ...

Public Library Science2016

Chromatin regulatory processes, like all biological reactions, are dynamic and stochastic in nature but can give rise to stable and inheritable changes in gene expression patterns. A molecular understanding of those processes is key for fundamental biologi ...

American Chemical Society2016