ジャーナル: Nature / 年: 2020 タイトル: Structure of SWI/SNF chromatin remodeller RSC bound to a nucleosome. 著者: Felix R Wagner / Christian Dienemann / Haibo Wang / Alexandra Stützer / Dimitry Tegunov / Henning Urlaub / Patrick Cramer / 要旨: Chromatin-remodelling complexes of the SWI/SNF family function in the formation of nucleosome-depleted, transcriptionally active promoter regions (NDRs). In the yeast Saccharomyces cerevisiae, the ...Chromatin-remodelling complexes of the SWI/SNF family function in the formation of nucleosome-depleted, transcriptionally active promoter regions (NDRs). In the yeast Saccharomyces cerevisiae, the essential SWI/SNF complex RSC contains 16 subunits, including the ATP-dependent DNA translocase Sth1. RSC removes nucleosomes from promoter regions and positions the specialized +1 and -1 nucleosomes that flank NDRs. Here we present the cryo-electron microscopy structure of RSC in complex with a nucleosome substrate. The structure reveals that RSC forms five protein modules and suggests key features of the remodelling mechanism. The body module serves as a scaffold for the four flexible modules that we call DNA-interacting, ATPase, arm and actin-related protein (ARP) modules. The DNA-interacting module binds extra-nucleosomal DNA and is involved in the recognition of promoter DNA elements that influence RSC functionality. The ATPase and arm modules sandwich the nucleosome disc with the Snf2 ATP-coupling (SnAC) domain and the finger helix, respectively. The translocase motor of the ATPase module engages with the edge of the nucleosome at superhelical location +2. The mobile ARP module may modulate translocase-nucleosome interactions to regulate RSC activity. The RSC-nucleosome structure provides a basis for understanding NDR formation and the structure and function of human SWI/SNF complexes that are frequently mutated in cancer.
タンパク質・ペプチド: Regulator of Ty1 transposition protein 102
タンパク質・ペプチド: Unknown protein
複合体: ATPase domain of Sth1 bound to the nucleosome
タンパク質・ペプチド: Histone H3.2
タンパク質・ペプチド: Histone H4
タンパク質・ペプチド: Histone H2A
タンパク質・ペプチド: Histone H2B 1.1
複合体: DNA
DNA: DNA-I
DNA: DNA-J
リガンド: ZINC ION
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超分子 #1: Chromatin remodelling complex RSC ('remodels the structure of chr...
超分子
名称: Chromatin remodelling complex RSC ('remodels the structure of chromatin') bound to a nucleosome タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1-#19
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超分子 #2: RSC core
超分子
名称: RSC core / タイプ: complex / ID: 2 / 親要素: 1 / 含まれる分子: #7-#19 詳細: Composite map 8 made by Warp using the maps 4, 5, 6.
由来(天然)
生物種: Saccharomyces cerevisiae S288C (パン酵母)
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超分子 #3: ATPase domain of Sth1 bound to the nucleosome
超分子
名称: ATPase domain of Sth1 bound to the nucleosome / タイプ: complex / ID: 3 / 親要素: 1 / 含まれる分子: #1-#4 / 詳細: Composite map 7 made by Warp using the maps 2, 3.