+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-6334 | |||||||||
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タイトル | Negative stain 3D reconstruction of the yeast 26S proteasome in ATPgS in the presence of wild-type Ubp6 protein | |||||||||
マップデータ | Negative stain 3D reconstruction of the yeast 26S proteasome in ATPgS in the presence of wild-type Ubp6 protein | |||||||||
試料 |
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キーワード | Proteasome / UPS / Ubp6 / deubiquitinase / regulatory particle | |||||||||
機能・相同性 | proteasome regulatory particle / Proteasome, subunit alpha/beta 機能・相同性情報 | |||||||||
生物種 | Saccharomyces cerevisiae (パン酵母) | |||||||||
手法 | 単粒子再構成法 / ネガティブ染色法 / 解像度: 25.2 Å | |||||||||
データ登録者 | Bashore C / Dambacher CM / Matyskiela M / Lander GC / Martin A | |||||||||
引用 | ジャーナル: Nat Struct Mol Biol / 年: 2015 タイトル: Ubp6 deubiquitinase controls conformational dynamics and substrate degradation of the 26S proteasome. 著者: Charlene Bashore / Corey M Dambacher / Ellen A Goodall / Mary E Matyskiela / Gabriel C Lander / Andreas Martin / 要旨: Substrates are targeted for proteasomal degradation through the attachment of ubiquitin chains that need to be removed by proteasomal deubiquitinases before substrate processing. In budding yeast, ...Substrates are targeted for proteasomal degradation through the attachment of ubiquitin chains that need to be removed by proteasomal deubiquitinases before substrate processing. In budding yeast, the deubiquitinase Ubp6 trims ubiquitin chains and affects substrate processing by the proteasome, but the underlying mechanisms and the location of Ubp6 within the holoenzyme have been elusive. Here we show that Ubp6 activity strongly responds to interactions with the base ATPase and the conformational state of the proteasome. Electron microscopy analyses reveal that ubiquitin-bound Ubp6 contacts the N ring and AAA+ ring of the ATPase hexamer and is in proximity to the deubiquitinase Rpn11. Ubiquitin-bound Ubp6 inhibits substrate deubiquitination by Rpn11, stabilizes the substrate-engaged conformation of the proteasome and allosterically interferes with the engagement of a subsequent substrate. Ubp6 may thus act as a ubiquitin-dependent 'timer' to coordinate individual processing steps at the proteasome and modulate substrate degradation. | |||||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | EMマップ: SurfViewMolmilJmol/JSmol |
添付画像 |
-ダウンロードとリンク
-EMDBアーカイブ
マップデータ | emd_6334.map.gz | 40 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-6334-v30.xml emd-6334.xml | 12 KB 12 KB | 表示 表示 | EMDBヘッダ |
画像 | 400_6334.gif 80_6334.gif | 31.6 KB 3.8 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-6334 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-6334 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_6334_validation.pdf.gz | 78.1 KB | 表示 | EMDB検証レポート |
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文書・詳細版 | emd_6334_full_validation.pdf.gz | 77.2 KB | 表示 | |
XML形式データ | emd_6334_validation.xml.gz | 492 B | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-6334 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-6334 | HTTPS FTP |
-関連構造データ
-リンク
EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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-マップ
ファイル | ダウンロード / ファイル: emd_6334.map.gz / 形式: CCP4 / 大きさ: 41.9 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | Negative stain 3D reconstruction of the yeast 26S proteasome in ATPgS in the presence of wild-type Ubp6 protein | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 4.1 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
-試料の構成要素
-全体 : Negative stain 3D reconstruction of the yeast 26S proteasome in A...
全体 | 名称: Negative stain 3D reconstruction of the yeast 26S proteasome in ATPgS in the presence of wild-type Ubp6 protein |
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要素 |
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-超分子 #1000: Negative stain 3D reconstruction of the yeast 26S proteasome in A...
超分子 | 名称: Negative stain 3D reconstruction of the yeast 26S proteasome in ATPgS in the presence of wild-type Ubp6 protein タイプ: sample / ID: 1000 / 詳細: The sample was monodisperse. 集合状態: One to two 19S regulatory particles associates with the core particle to form a functional holoenzyme Number unique components: 1 |
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分子量 | 実験値: 1.5 MDa / 理論値: 1.5 MDa |
-分子 #1: 26S proteasome
分子 | 名称: 26S proteasome / タイプ: protein_or_peptide / ID: 1 / Name.synonym: Proteasome Holoenzyme 詳細: Samples of 26S holoenzyme were incubated with wild-type Ubp6 protein in the presence of ATPgS, then diluted to ~25 nM for analysis by negative stain electron microscopy. コピー数: 1 / 組換発現: No / データベース: NCBI |
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由来(天然) | 生物種: Saccharomyces cerevisiae (パン酵母) / 株: YYS40 / 別称: yeast / 細胞中の位置: cytoplasm |
分子量 | 実験値: 1.5 MDa / 理論値: 1.5 MDa |
配列 | GO: proteasome regulatory particle / InterPro: Proteasome, subunit alpha/beta |
-実験情報
-構造解析
手法 | ネガティブ染色法 |
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解析 | 単粒子再構成法 |
試料の集合状態 | particle |
-試料調製
濃度 | 0.05 mg/mL |
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緩衝液 | pH: 7.6 詳細: 60 mM HEPES, pH 7.6, 50 mM NaCl, 50 mM KCl, 5 mM MgCl2, 0.5 mM EDTA, 1 mM TCEP, 1 mM ATPgS |
染色 | タイプ: NEGATIVE 詳細: 4 uL of sample was applied to a freshly plasma-cleaned thin carbon surface pre-treated with 0.1% w/v poly-L-lysine hydrobromide. After removal of excess protein, negative staining was ...詳細: 4 uL of sample was applied to a freshly plasma-cleaned thin carbon surface pre-treated with 0.1% w/v poly-L-lysine hydrobromide. After removal of excess protein, negative staining was performed using 2% w/v uranyl formate solution. |
グリッド | 詳細: 400 mesh Cu-Rh Maxtaform grids were used following deposition of a thin continuous carbon film. |
凍結 | 凍結剤: NONE / 装置: OTHER |
-電子顕微鏡法
顕微鏡 | FEI TECNAI SPIRIT |
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温度 | 最低: 294 K / 最高: 297 K / 平均: 295 K |
アライメント法 | Legacy - 非点収差: Objective lens astigmatism was corrected using a quadrupole stigmator at 52,000 times magnification. |
日付 | 2014年8月26日 |
撮影 | カテゴリ: CCD フィルム・検出器のモデル: TVIPS TEMCAM-F416 (4k x 4k) デジタル化 - サンプリング間隔: 2.5 µm / 実像数: 214 / 平均電子線量: 20 e/Å2 詳細: Automated imaging was performed using Leginon software. |
Tilt angle min | 0 |
Tilt angle max | 0 |
電子線 | 加速電圧: 120 kV / 電子線源: LAB6 |
電子光学系 | 倍率(補正後): 52000 / 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.2 mm / 最大 デフォーカス(公称値): 1.5 µm / 最小 デフォーカス(公称値): 0.5 µm / 倍率(公称値): 52000 |
試料ステージ | 試料ホルダー: Room temperature, side entry holder / 試料ホルダーモデル: SIDE ENTRY, EUCENTRIC |
実験機器 | モデル: Tecnai Spirit / 画像提供: FEI Company |
-画像解析
詳細 | The Appion software package was used for image processing leading to 3D reconstruction. Particles were selected from raw micrographs using the Difference of Gaussians (DoG)-based automated particle picker. The stack was subjected to five rounds of iterative 2D alignment and classification using multivariate statistical analysis (MSA) and multi-reference alignment (MRA). The selected particle stack was subjected to twenty-five iterations of 3D classification, requesting four classes using the Relion suite. Particles comprising well-resolved 3D class averages were used for further refinement by projection matching in Relion. |
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CTF補正 | 詳細: Phase flipping of whole micrographs |
最終 再構成 | アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 25.2 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: Relion 詳細: Final 3D models were refined using 9000 particles selected by combining two of the 3D classes from Relion processing. 使用した粒子像数: 9000 |
最終 2次元分類 | クラス数: 4 |