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基本情報
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タイトル | Cryo-EM structure of the SIN3L complex from S. pombe | |||||||||
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![]() | SIN3 / SIN3L / Pst1 / Pst3 / Clr6 / deacetylase / DNA BINDING PROTEIN | |||||||||
機能・相同性 | ![]() Regulation of TP53 Activity through Acetylation / PI5P Regulates TP53 Acetylation / SUMOylation of transcription cofactors / HATs acetylate histones / histone H4K16 deacetylase activity, hydrolytic mechanism / histone H4K5 deacetylase activity, hydrolytic mechanism / histone H4K8 deacetylase activity, hydrolytic mechanism / histone H3K14 deacetylase activity, hydrolytic mechanism / Ub-specific processing proteases / HDACs deacetylate histones ...Regulation of TP53 Activity through Acetylation / PI5P Regulates TP53 Acetylation / SUMOylation of transcription cofactors / HATs acetylate histones / histone H4K16 deacetylase activity, hydrolytic mechanism / histone H4K5 deacetylase activity, hydrolytic mechanism / histone H4K8 deacetylase activity, hydrolytic mechanism / histone H3K14 deacetylase activity, hydrolytic mechanism / Ub-specific processing proteases / HDACs deacetylate histones / histone H4K12 deacetylase activity, hydrolytic mechanism / SUMOylation of chromatin organization proteins / H3-H4 histone complex chaperone activity / histone H3K9 deacetylase activity, hydrolytic mechanism / Rpd3L complex / Rpd3L-Expanded complex / Rpd3S complex / pericentric heterochromatin formation / histone deacetylase / protein lysine deacetylase activity / histone deacetylase activity / DNA repair-dependent chromatin remodeling / NuA4 histone acetyltransferase complex / Sin3-type complex / : / pericentric heterochromatin / transcription initiation-coupled chromatin remodeling / epigenetic regulation of gene expression / double-strand break repair via nonhomologous end joining / histone deacetylase binding / transcription corepressor activity / heterochromatin formation / histone binding / chromatin remodeling / cell division / regulation of transcription by RNA polymerase II / regulation of DNA-templated transcription / chromatin / negative regulation of transcription by RNA polymerase II / zinc ion binding / nucleus / cytosol / cytoplasm 類似検索 - 分子機能 | |||||||||
生物種 | ![]() ![]() | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.2 Å | |||||||||
![]() | Wang C / Guo Z / Zhan X | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Two assembly modes for SIN3 histone deacetylase complexes. 著者: Chengcheng Wang / Zhouyan Guo / Chen Chu / Yichen Lu / Xiaofeng Zhang / Xiechao Zhan / ![]() 要旨: The switch-independent 3 (SIN3)/histone deacetylase (HDAC) complexes play essential roles in regulating chromatin accessibility and gene expression. There are two major types of SIN3/HDAC complexes ...The switch-independent 3 (SIN3)/histone deacetylase (HDAC) complexes play essential roles in regulating chromatin accessibility and gene expression. There are two major types of SIN3/HDAC complexes (named SIN3L and SIN3S) targeting different chromatin regions. Here we present the cryo-electron microscopy structures of the SIN3L and SIN3S complexes from Schizosaccharomyces pombe (S. pombe), revealing two distinct assembly modes. In the structure of SIN3L, each Sin3 isoform (Pst1 and Pst3) interacts with one histone deacetylase Clr6, and one WD40-containing protein Prw1, forming two lobes. These two lobes are bridged by two vertical coiled-coil domains from Sds3/Dep1 and Rxt2/Png2, respectively. In the structure of SIN3S, there is only one lobe organized by another Sin3 isoform Pst2; each of the Cph1 and Cph2 binds to an Eaf3 molecule, providing two modules for histone recognition and binding. Notably, the Pst1 Lobe in SIN3L and the Pst2 Lobe in SIN3S adopt similar conformation with their deacetylase active sites exposed to the space; however, the Pst3 Lobe in SIN3L is in a compact state with its active center buried inside and blocked. Our work reveals two classical organization mechanisms for the SIN3/HDAC complexes to achieve specific targeting and provides a framework for studying the histone deacetylase complexes. | |||||||||
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マップ
ファイル | ![]() | ||||||||||||||||||||
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ボクセルのサイズ | X=Y=Z: 1.087 Å | ||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
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試料の構成要素
+全体 : The SIN3S complex
+超分子 #1: The SIN3S complex
+分子 #1: Paired amphipathic helix protein pst1
+分子 #2: Paired amphipathic helix protein pst3
+分子 #3: Histone deacetylase clr6
+分子 #4: Transcriptional regulatory protein dep1
+分子 #5: Transcriptional regulatory protein rxt2
+分子 #6: Transcriptional regulatory protein sds3
+分子 #7: Chromatin modification-related protein png2
+分子 #8: Transcriptional regulatory protein rxt3
+分子 #9: RbAp48-related WD40 repeat-containing protein prw1
+分子 #10: ZINC ION
+分子 #11: POTASSIUM ION
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
緩衝液 | pH: 7.4 |
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凍結 | 凍結剤: ETHANE |
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電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 平均電子線量: 50.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD 最大 デフォーカス(公称値): 2.3000000000000003 µm 最小 デフォーカス(公称値): 1.8 µm |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |