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Journal ArticleDOI

Chromatin accessibility and the regulatory epigenome.

Sandy Klemm, +2 more
- 01 Apr 2019 - 
- Vol. 20, Iss: 4, pp 207-220
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TLDR
The goal is to illustrate how chromatin accessibility defines regulatory elements within the genome and how these epigenetic features are dynamically established to control gene expression.
Abstract
Physical access to DNA is a highly dynamic property of chromatin that plays an essential role in establishing and maintaining cellular identity. The organization of accessible chromatin across the genome reflects a network of permissible physical interactions through which enhancers, promoters, insulators and chromatin-binding factors cooperatively regulate gene expression. This landscape of accessibility changes dynamically in response to both external stimuli and developmental cues, and emerging evidence suggests that homeostatic maintenance of accessibility is itself dynamically regulated through a competitive interplay between chromatin-binding factors and nucleosomes. In this Review, we examine how the accessible genome is measured and explore the role of transcription factors in initiating accessibility remodelling; our goal is to illustrate how chromatin accessibility defines regulatory elements within the genome and how these epigenetic features are dynamically established to control gene expression.

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Citations
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Hundreds of variants clustered in genomic loci and biological pathways affect human height

Hana Lango Allen, +289 more
TL;DR: In this paper, the authors show that hundreds of genetic variants, in at least 180 loci, influence adult height, a highly heritable and classic polygenic trait, revealing patterns with important implications for genetic studies of common human diseases and traits.
Journal Article

The Genomic Code for Nucleosome Positioning

TL;DR: In this article, a nucleosome-DNA interaction model was proposed to predict the genome-wide organization of nucleosomes, and it was shown that genomes encode an intrinsic nucleosomal organization and that this intrinsic organization can explain ∼50% of the in-vivo positions.
Journal ArticleDOI

Determinants of enhancer and promoter activities of regulatory elements.

TL;DR: The latest findings from methodologies for profiling and testing transcriptional regulatory elements at scale are discussed, and how the data support an updated, nuanced model that accounts for the numerous overlapping molecular properties of promoters and enhancers are explained.
Journal ArticleDOI

Interaction of the Glucocorticoid Receptor with the Chromatin Landscape

TL;DR: In this article, the authors characterized glucocorticoid receptor (GR) binding events and chromatin structural transitions across GR-induced or -repressed genes, revealing that GR binding invariably occurs at nuclease-accessible sites (DHS).
References
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Journal ArticleDOI

Enzymatic amplification of beta-globin genomic sequences and restriction site analysis for diagnosis of sickle cell anemia.

TL;DR: Two new methods were used to establish a rapid and highly sensitive prenatal diagnostic test for sickle cell anemia, using primer-mediated enzymatic amplification of specific beta-globin target sequences in genomic DNA, resulting in the exponential increase of target DNA copies.
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Crystal structure of the nucleosome core particle at 2.8 Å resolution

TL;DR: The X-ray crystal structure of the nucleosome core particle of chromatin shows in atomic detail how the histone protein octamer is assembled and how 146 base pairs of DNA are organized into a superhelix around it.
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High-resolution profiling of histone methylations in the human genome.

TL;DR: High-resolution maps for the genome-wide distribution of 20 histone lysine and arginine methylations as well as histone variant H2A.Z, RNA polymerase II, and the insulator binding protein CTCF across the human genome using the Solexa 1G sequencing technology are generated.
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Transposition of native chromatin for fast and sensitive epigenomic profiling of open chromatin, DNA-binding proteins and nucleosome position

TL;DR: The feasibility of analyzing an individual's epigenome on a timescale compatible with clinical decision-making is demonstrated and classes of DNA-binding factors that strictly avoided, could tolerate or tended to overlap with nucleosomes are discovered.
Journal ArticleDOI

The Role of Chromatin during Transcription

TL;DR: This Review highlights advances in the understanding of chromatin regulation and discusses how such regulation affects the binding of transcription factors as well as the initiation and elongation steps of transcription.
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