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-Structure paper
タイトル | Structure and regulation of the human INO80-nucleosome complex. |
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ジャーナル・号・ページ | Nature, Vol. 556, Issue 7701, Page 391-395, Year 2018 |
掲載日 | 2018年4月11日 |
![]() | Rafael Ayala / Oliver Willhoft / Ricardo J Aramayo / Martin Wilkinson / Elizabeth A McCormack / Lorraine Ocloo / Dale B Wigley / Xiaodong Zhang / ![]() |
PubMed 要旨 | Access to DNA within nucleosomes is required for a variety of processes in cells including transcription, replication and repair. Consequently, cells encode multiple systems that remodel nucleosomes. ...Access to DNA within nucleosomes is required for a variety of processes in cells including transcription, replication and repair. Consequently, cells encode multiple systems that remodel nucleosomes. These complexes can be simple, involving one or a few protein subunits, or more complicated multi-subunit machines . Biochemical studies have placed the motor domains of several chromatin remodellers in the superhelical location 2 region of the nucleosome. Structural studies of yeast Chd1 and Snf2-a subunit in the complex with the capacity to remodel the structure of chromatin (RSC)-in complex with nucleosomes have provided insights into the basic mechanism of nucleosome sliding performed by these complexes. However, how larger, multi-subunit remodelling complexes such as INO80 interact with nucleosomes and how remodellers carry out functions such as nucleosome sliding , histone exchange and nucleosome spacing remain poorly understood. Although some remodellers work as monomers , others work as highly cooperative dimers. Here we present the structure of the human INO80 chromatin remodeller with a bound nucleosome, which reveals that INO80 interacts with nucleosomes in a previously undescribed manner: the motor domains are located on the DNA at the entry point to the nucleosome, rather than at superhelical location 2. The ARP5-IES6 module of INO80 makes additional contacts on the opposite side of the nucleosome. This arrangement enables the histone H3 tails of the nucleosome to have a role in the regulation of the activities of the INO80 motor domain-unlike in other characterized remodellers, for which H4 tails have been shown to regulate the motor domains. |
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手法 | EM (単粒子) |
解像度 | 4.8 Å |
構造データ | |
化合物 | ![]() ChemComp-ADP: ![]() ChemComp-ZN: |
由来 |
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![]() | DNA BINDING PROTEIN / Chromatin / Remodeller / Nucleosome / DNA Binding / Histones / DNA repair / ATPase / Helicase / Sliding / Complex |