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-Structure paper
タイトル | Structure and mechanism of the chromatin remodelling factor ISW1a. |
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ジャーナル・号・ページ | Nature, Vol. 472, Issue 7344, Page 448-453, Year 2011 |
掲載日 | 2011年4月28日 |
著者 | Kazuhiro Yamada / Timothy D Frouws / Brigitte Angst / Daniel J Fitzgerald / Carl DeLuca / Kyoko Schimmele / David F Sargent / Timothy J Richmond / |
PubMed 要旨 | Site-specific recognition of DNA in eukaryotic organisms depends on the arrangement of nucleosomes in chromatin. In the yeast Saccharomyces cerevisiae, ISW1a and related chromatin remodelling factors ...Site-specific recognition of DNA in eukaryotic organisms depends on the arrangement of nucleosomes in chromatin. In the yeast Saccharomyces cerevisiae, ISW1a and related chromatin remodelling factors are implicated in establishing the nucleosome repeat during replication and altering nucleosome position to affect gene activity. Here we have solved the crystal structures of S. cerevisiae ISW1a lacking its ATPase domain both alone and with DNA bound at resolutions of 3.25 Å and 3.60 Å, respectively, and we have visualized two different nucleosome-containing remodelling complexes using cryo-electron microscopy. The composite X-ray and electron microscopy structures combined with site-directed photocrosslinking analyses of these complexes suggest that ISW1a uses a dinucleosome substrate for chromatin remodelling. Results from a remodelling assay corroborate the dinucleosome model. We show how a chromatin remodelling factor could set the spacing between two adjacent nucleosomes acting as a 'protein ruler'. |
リンク | Nature / PubMed:21525927 |
手法 | EM (単粒子) / X線回折 |
解像度 | 3.25 - 24.0 Å |
構造データ | EMDB-1877: EMDB-1878: PDB-2y9y: PDB-2y9z: |
由来 |
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キーワード | TRANSCRIPTION / NUCLEAR PROTEIN COMPLEX / CHROMATIN REMODELING / NUCLEOSOME REMODELING / NUCLEAR PROTEIN-DNA COMPLEX |