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Inferring nucleosome positions with their histone mark annotation from ChIP data.


ABSTRACT:

Motivation

The nucleosome is the basic repeating unit of chromatin. It contains two copies each of the four core histones H2A, H2B, H3 and H4 and about 147 bp of DNA. The residues of the histone proteins are subject to numerous post-translational modifications, such as methylation or acetylation. Chromatin immunoprecipitiation followed by sequencing (ChIP-seq) is a technique that provides genome-wide occupancy data of these modified histone proteins, and it requires appropriate computational methods.

Results

We present NucHunter, an algorithm that uses the data from ChIP-seq experiments directed against many histone modifications to infer positioned nucleosomes. NucHunter annotates each of these nucleosomes with the intensities of the histone modifications. We demonstrate that these annotations can be used to infer nucleosomal states with distinct correlations to underlying genomic features and chromatin-related processes, such as transcriptional start sites, enhancers, elongation by RNA polymerase II and chromatin-mediated repression. Thus, NucHunter is a versatile tool that can be used to predict positioned nucleosomes from a panel of histone modification ChIP-seq experiments and infer distinct histone modification patterns associated to different chromatin states.

Availability

The software is available at http://epigen.molgen.mpg.de/nuchunter/.

SUBMITTER: Mammana A 

PROVIDER: S-EPMC3789549 | biostudies-literature | 2013 Oct

REPOSITORIES: biostudies-literature

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Publications

Inferring nucleosome positions with their histone mark annotation from ChIP data.

Mammana Alessandro A   Vingron Martin M   Chung Ho-Ryun HR  

Bioinformatics (Oxford, England) 20130826 20


<h4>Motivation</h4>The nucleosome is the basic repeating unit of chromatin. It contains two copies each of the four core histones H2A, H2B, H3 and H4 and about 147 bp of DNA. The residues of the histone proteins are subject to numerous post-translational modifications, such as methylation or acetylation. Chromatin immunoprecipitiation followed by sequencing (ChIP-seq) is a technique that provides genome-wide occupancy data of these modified histone proteins, and it requires appropriate computati  ...[more]

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