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基本情報
登録情報 | データベース: PDB / ID: 9dgg | ||||||||||||
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タイトル | ncPRC1RYBP bound to unmodified nucleosome | ||||||||||||
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![]() | NUCLEAR PROTEIN/DNA / DNA complex protein / NUCLEAR PROTEIN-DNA complex | ||||||||||||
機能・相同性 | ![]() histone H2AK119 ubiquitin ligase activity / PRC1 complex / RING-like zinc finger domain binding / regulation of kidney development / segment specification / rostrocaudal neural tube patterning / ubiquitin-protein transferase activator activity / somatic stem cell division / embryonic skeletal system morphogenesis / regulation of adaxial/abaxial pattern formation ...histone H2AK119 ubiquitin ligase activity / PRC1 complex / RING-like zinc finger domain binding / regulation of kidney development / segment specification / rostrocaudal neural tube patterning / ubiquitin-protein transferase activator activity / somatic stem cell division / embryonic skeletal system morphogenesis / regulation of adaxial/abaxial pattern formation / sex chromatin / positive regulation of immature T cell proliferation in thymus / PcG protein complex / SUMOylation of DNA methylation proteins / gastrulation with mouth forming second / SUMOylation of RNA binding proteins / anterior/posterior axis specification / positive regulation of ubiquitin-protein transferase activity / DNA methylation-dependent constitutive heterochromatin formation / negative regulation of gene expression, epigenetic / RUNX1 interacts with co-factors whose precise effect on RUNX1 targets is not known / Transcriptional Regulation by E2F6 / germ cell development / hemopoiesis / humoral immune response / MLL1 complex / negative regulation of apoptotic signaling pathway / cellular response to interleukin-1 / ubiquitin ligase complex / cellular response to dexamethasone stimulus / negative regulation of DNA-binding transcription factor activity / SUMOylation of DNA damage response and repair proteins / heterochromatin / positive regulation of B cell proliferation / SUMOylation of transcription cofactors / SUMOylation of chromatin organization proteins / epigenetic regulation of gene expression / Regulation of PTEN gene transcription / apoptotic signaling pathway / promoter-specific chromatin binding / euchromatin / brain development / RING-type E3 ubiquitin transferase / positive regulation of fibroblast proliferation / structural constituent of chromatin / ubiquitin protein ligase activity / nucleosome / heterochromatin formation / mitotic cell cycle / nucleosome assembly / regulation of gene expression / Oxidative Stress Induced Senescence / gene expression / in utero embryonic development / protein ubiquitination / nuclear body / chromatin remodeling / protein heterodimerization activity / chromatin binding / negative regulation of transcription by RNA polymerase II / DNA binding / zinc ion binding / nucleoplasm / nucleus / cytosol / cytoplasm 類似検索 - 分子機能 | ||||||||||||
生物種 | ![]() synthetic construct (人工物) ![]() | ||||||||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 2.98 Å | ||||||||||||
![]() | Godinez-Lopez, V. / Valencia-Sanchez, M.I. / Armache, J.P. / Armache, K.-J. | ||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Read-write mechanisms of H2A ubiquitination by Polycomb repressive complex 1. 著者: Victoria Godínez López / Marco Igor Valencia-Sánchez / Stephen Abini-Agbomson / Jonathan F Thomas / Rachel Lee / Pablo De Ioannes / Brian A Sosa / Jean-Paul Armache / Karim-Jean Armache / ![]() 要旨: Epigenetic inheritance of silent chromatin domains is fundamental to cellular memory during embryogenesis, but it must overcome the dilution of repressive histone modifications during DNA replication. ...Epigenetic inheritance of silent chromatin domains is fundamental to cellular memory during embryogenesis, but it must overcome the dilution of repressive histone modifications during DNA replication. One such modification, histone H2A lysine 119 monoubiquitination (H2AK119Ub), needs to be re-established by the Polycomb repressive complex 1 (PRC1) E3 ligase to restore the silent Polycomb domain. However, the exact mechanism behind this restoration remains unknown. Here, combining cryo-electron microscopy (cryo-EM) and functional approaches, we characterize the read-write mechanism of the non-canonical PRC1-containing RYBP (ncPRC1). This mechanism, which functions as a positive-feedback loop in epigenetic regulation, emphasizes the pivotal role of ncPRC1 in restoring H2AK119Ub. We observe an asymmetrical binding of ncPRC1 to H2AK119Ub nucleosomes, guided in part by the N-terminal zinc-finger domain of RYBP binding to residual H2AK119Ub on nascent chromatin. This recognition positions the RING domains of RING1B and BMI1 on the unmodified nucleosome side, enabling recruitment of the E2 enzyme to ubiquitinate H2AK119 within the same nucleosome (intra-nucleosome read-write) or across nucleosomes (inter-nucleosome read-write). Collectively, our findings provide key structural and mechanistic insights into the dynamic interplay of epigenetic regulation, highlighting the significance of ncPRC1 in H2AK119Ub restoration to sustain repressive chromatin domains. | ||||||||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロード
PDBx/mmCIF形式 | ![]() | 364.1 KB | 表示 | ![]() |
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PDB形式 | ![]() | 270.1 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1.3 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.3 MB | 表示 | |
XML形式データ | ![]() | 45.2 KB | 表示 | |
CIF形式データ | ![]() | 69.4 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
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リンク
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集合体
登録構造単位 | ![]()
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要素
-タンパク質 , 6種, 10分子 AEBFCGDHKL
#1: タンパク質 | 分子量: 15435.126 Da / 分子数: 2 / 変異: G103A / 由来タイプ: 組換発現 由来: (組換発現) ![]() 発現宿主: ![]() ![]() #2: タンパク質 | 分子量: 11394.426 Da / 分子数: 2 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 発現宿主: ![]() ![]() #3: タンパク質 | 分子量: 14093.436 Da / 分子数: 2 / 変異: G100R / 由来タイプ: 組換発現 由来: (組換発現) ![]() 発現宿主: ![]() ![]() #4: タンパク質 | 分子量: 13979.291 Da / 分子数: 2 / 変異: S33T / 由来タイプ: 組換発現 由来: (組換発現) ![]() 発現宿主: ![]() ![]() #7: タンパク質 | | 分子量: 37006.062 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #8: タンパク質 | | 分子量: 37706.371 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
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-DNA鎖 , 2種, 2分子 IJ
#5: DNA鎖 | 分子量: 57982.918 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) synthetic construct (人工物) / 発現宿主: ![]() ![]() |
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#6: DNA鎖 | 分子量: 57488.551 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) synthetic construct (人工物) / 発現宿主: ![]() ![]() |
-非ポリマー , 1種, 4分子 
#9: 化合物 | ChemComp-ZN / |
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-詳細
研究の焦点であるリガンドがあるか | N |
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Has protein modification | N |
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
構成要素 | 名称: ncPRC1RYBP bound to unmodified nucleosome / タイプ: COMPLEX / Entity ID: #1-#8 / 由来: RECOMBINANT |
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分子量 | 実験値: NO |
由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() ![]() |
緩衝液 | pH: 7.5 |
試料 | 濃度: 0.1 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 298 K |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Talos Arctica / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TALOS ARCTICA |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2200 nm / 最小 デフォーカス(公称値): 1600 nm |
撮影 | 電子線照射量: 44.01 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 実像数: 3304 |
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解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 1394967 | |||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 2.98 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 205635 / 対称性のタイプ: POINT | |||||||||||||||||||||||||||||||||||
原子モデル構築 | 空間: REAL | |||||||||||||||||||||||||||||||||||
原子モデル構築 |
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