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  • 1
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    agplus: a rapid and flexible tool for aggregation plots (2015)
    Oxford University Press
    Details
    Publication Date: 2015-09-11
    Description: : Aggregation plots are frequently used to evaluate signal distributions at user-interested points in ChIP-Seq data analysis. agplus, a new and simple command-line tool, enables rapid and flexible generation of text tables tailored for aggregation plots from which users can easily design multiple groups based on user-definitions such as regulatory regions or transcription initiation sites. Availability and Implementation: This software is implemented in Ruby, supported on Linux and Mac OSX, and freely available at http://github.com/kazumits/agplus Contact: yohkawa@epigenetics.med.kyushu-u.ac.jp
    Print ISSN: 1367-4803
    Electronic ISSN: 1460-2059
    Topics: Biology , Computer Science , Medicine
    Published by Oxford University Press
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  • 2
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    Crystal structure of the overlapping dinucleosome composed of hexasome and octasome (2017)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2017-04-15
    Description: Nucleosomes are dynamic entities that are repositioned along DNA by chromatin remodeling processes. A nucleosome repositioned by the switch-sucrose nonfermentable (SWI/SNF) remodeler collides with a neighbor and forms the intermediate "overlapping dinucleosome." Here, we report the crystal structure of the overlapping dinucleosome, in which two nucleosomes are associated, at 3.14-angstrom resolution. In the overlapping dinucleosome structure, the unusual "hexasome" nucleosome, composed of the histone hexamer lacking one H2A-H2B dimer from the conventional histone octamer, contacts the canonical "octasome" nucleosome, and they intimately associate. Consequently, about 250 base pairs of DNA are left-handedly wrapped in three turns, without a linker DNA segment between the hexasome and octasome moieties. The overlapping dinucleosome structure may provide important information to understand how nucleosome repositioning occurs during the chromatin remodeling process.
    Keywords: Biochemistry
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Human TREX component Thoc5 affects alternative polyadenylation site choice by recruiting mammalian cleavage factor I (2013)
    Oxford University Press
    Details
    Publication Date: 2013-08-09
    Description: The transcription-export complex (TREX) couples mRNA transcription, processing and nuclear export. We found that CFIm68, a large subunit of a heterotetrameric protein complex mammalian cleavage factor I (CFIm), which is implicated in alternative polyadenylation site choice, co-purified with Thoc5, a component of human TREX. Immunoprecipitation using antibodies against different components of TREX indicated that most likely both complexes interact via an interaction between Thoc5 and CFIm68. Microarray analysis using human HeLa cells revealed that a subset of genes was differentially expressed on Thoc5 knockdown. Notably, the depletion of Thoc5 selectively attenuated the expression of mRNAs polyadenylated at distal, but not proximal, polyadenylation sites, which phenocopied the depletion of CFIm68. Chromatin immunoprecipitation coupled with high-throughput sequencing (ChIP-Seq) indicated that CFIm68 preferentially associated with the 5' regions of genes; strikingly, the 5' peak of CFIm68 was significantly and globally reduced on Thoc5 knockdown. We suggest a model in which human Thoc5 controls polyadenylation site choice through the co-transcriptional loading of CFIm68 onto target genes.
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
    Published by Oxford University Press
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