+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-30990 | ||||||||||||||||||
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タイトル | Cryo-EM structure of alpha 7 homo-tetradecamer | ||||||||||||||||||
マップデータ | Symmetric type of alpha 7 homo-tetradecamer | ||||||||||||||||||
試料 |
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キーワード | Conformational fluctuation / double-ring / proteasome / D7 symmetry / CHAPERONE / LYASE | ||||||||||||||||||
機能・相同性 | 機能・相同性情報 regulation of endopeptidase activity / Regulation of ornithine decarboxylase (ODC) / proteasome core complex / Cross-presentation of soluble exogenous antigens (endosomes) / Somitogenesis / proteasome core complex, alpha-subunit complex / proteasome complex / Regulation of activated PAK-2p34 by proteasome mediated degradation / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin ...regulation of endopeptidase activity / Regulation of ornithine decarboxylase (ODC) / proteasome core complex / Cross-presentation of soluble exogenous antigens (endosomes) / Somitogenesis / proteasome core complex, alpha-subunit complex / proteasome complex / Regulation of activated PAK-2p34 by proteasome mediated degradation / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / Asymmetric localization of PCP proteins / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / Ubiquitin-dependent degradation of Cyclin D / AUF1 (hnRNP D0) binds and destabilizes mRNA / TNFR2 non-canonical NF-kB pathway / Vpu mediated degradation of CD4 / Assembly of the pre-replicative complex / Degradation of DVL / Ubiquitin Mediated Degradation of Phosphorylated Cdc25A / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / Dectin-1 mediated noncanonical NF-kB signaling / Hh mutants are degraded by ERAD / Degradation of AXIN / Activation of NF-kappaB in B cells / Degradation of GLI1 by the proteasome / Hedgehog ligand biogenesis / Defective CFTR causes cystic fibrosis / G2/M Checkpoints / Negative regulation of NOTCH4 signaling / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Autodegradation of the E3 ubiquitin ligase COP1 / Vif-mediated degradation of APOBEC3G / Regulation of RUNX3 expression and activity / Hedgehog 'on' state / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / MAPK6/MAPK4 signaling / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / Degradation of beta-catenin by the destruction complex / ABC-family proteins mediated transport / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / CDK-mediated phosphorylation and removal of Cdc6 / CLEC7A (Dectin-1) signaling / SCF(Skp2)-mediated degradation of p27/p21 / Regulation of expression of SLITs and ROBOs / FCERI mediated NF-kB activation / Regulation of PTEN stability and activity / Interleukin-1 signaling / Orc1 removal from chromatin / Regulation of RAS by GAPs / Separation of Sister Chromatids / Regulation of RUNX2 expression and activity / The role of GTSE1 in G2/M progression after G2 checkpoint / UCH proteinases / KEAP1-NFE2L2 pathway / Antigen processing: Ubiquitination & Proteasome degradation / Downstream TCR signaling / RUNX1 regulates transcription of genes involved in differentiation of HSCs / Neddylation / ER-Phagosome pathway / proteasome-mediated ubiquitin-dependent protein catabolic process / Ub-specific processing proteases / ubiquitin protein ligase binding / synapse / extracellular exosome / nucleoplasm / nucleus / cytosol / cytoplasm 類似検索 - 分子機能 | ||||||||||||||||||
生物種 | Homo sapiens (ヒト) | ||||||||||||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 5.9 Å | ||||||||||||||||||
データ登録者 | Song C / Murata K | ||||||||||||||||||
資金援助 | 日本, 5件
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引用 | ジャーナル: Int J Mol Sci / 年: 2021 タイトル: Structural Fluctuations of the Human Proteasome α7 Homo-Tetradecamer Double Ring Imply the Proteasomal α-Ring Assembly Mechanism. 著者: Chihong Song / Tadashi Satoh / Taichiro Sekiguchi / Koichi Kato / Kazuyoshi Murata / 要旨: The 20S proteasome, which is composed of layered α and β heptameric rings, is the core complex of the eukaryotic proteasome involved in proteolysis. The α7 subunit is a component of the α ring, ...The 20S proteasome, which is composed of layered α and β heptameric rings, is the core complex of the eukaryotic proteasome involved in proteolysis. The α7 subunit is a component of the α ring, and it self-assembles into a homo-tetradecamer consisting of two layers of α7 heptameric rings. However, the structure of the α7 double ring in solution has not been fully elucidated. We applied cryo-electron microscopy to delineate the structure of the α7 double ring in solution, revealing a structure different from the previously reported crystallographic model. The D7-symmetrical double ring was stacked with a 15° clockwise twist and a separation of 3 Å between the two rings. Two more conformations, dislocated and fully open, were also identified. Our observations suggest that the α7 double-ring structure fluctuates considerably in solution, allowing for the insertion of homologous α subunits, finally converting to the hetero-heptameric α rings in the 20S proteasome. | ||||||||||||||||||
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_30990.map.gz | 4.9 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-30990-v30.xml emd-30990.xml | 13.6 KB 13.6 KB | 表示 表示 | EMDBヘッダ |
FSC (解像度算出) | emd_30990_fsc.xml | 7.2 KB | 表示 | FSCデータファイル |
画像 | emd_30990.png | 113.2 KB | ||
Filedesc metadata | emd-30990.cif.gz | 5.7 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-30990 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-30990 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_30990_validation.pdf.gz | 427.6 KB | 表示 | EMDB検証レポート |
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文書・詳細版 | emd_30990_full_validation.pdf.gz | 427.2 KB | 表示 | |
XML形式データ | emd_30990_validation.xml.gz | 9.8 KB | 表示 | |
CIF形式データ | emd_30990_validation.cif.gz | 12.6 KB | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-30990 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-30990 | 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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「今月の分子」の関連する項目 |
-マップ
ファイル | ダウンロード / ファイル: emd_30990.map.gz / 形式: CCP4 / 大きさ: 30.5 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | Symmetric type of alpha 7 homo-tetradecamer | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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: 1.42 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 : Proteasome subunit alpha type-7
全体 | 名称: Proteasome subunit alpha type-7 |
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要素 |
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-超分子 #1: Proteasome subunit alpha type-7
超分子 | 名称: Proteasome subunit alpha type-7 / タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all |
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由来(天然) | 生物種: Homo sapiens (ヒト) |
-分子 #1: Proteasome subunit alpha type-3
分子 | 名称: Proteasome subunit alpha type-3 / タイプ: protein_or_peptide / ID: 1 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: Homo sapiens (ヒト) |
分子量 | 理論値: 28.469252 KDa |
組換発現 | 生物種: Escherichia coli (大腸菌) |
配列 | 文字列: MSSIGTGYDL SASTFSPDGR VFQVEYAMKA VENSSTAIGI RCKDGVVFGV EKLVLSKLYE EGSNKRLFNV DRHVGMAVAG LLADARSLA DIAREEASNF RSNFGYNIPL KHLADRVAMY VHAYTLYSAV RPFGCSFMLG SYSVNDGAQL YMIDPSGVSY G YWGCAIGK ...文字列: MSSIGTGYDL SASTFSPDGR VFQVEYAMKA VENSSTAIGI RCKDGVVFGV EKLVLSKLYE EGSNKRLFNV DRHVGMAVAG LLADARSLA DIAREEASNF RSNFGYNIPL KHLADRVAMY VHAYTLYSAV RPFGCSFMLG SYSVNDGAQL YMIDPSGVSY G YWGCAIGK ARQAAKTEIE KLQMKEMTCR DIVKEVAKII YIVHDEVKDK AFELELSWVG ELTNGRHEIV PKDIREEAEK YA KESLKEE DESDDDNM UniProtKB: Proteasome subunit alpha type-3 |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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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 | 1.0 mg/mL |
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緩衝液 | pH: 7.5 |
糖包埋 | 材質: Ice |
グリッド | モデル: Quantifoil R1.2/1.3 / 材質: MOLYBDENUM / メッシュ: 200 / 前処理 - タイプ: GLOW DISCHARGE / 前処理 - 時間: 60 sec. |
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 95 % / チャンバー内温度: 277 K |
-電子顕微鏡法
顕微鏡 | JEOL 2200FS |
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温度 | 最低: 76.0 K / 最高: 77.0 K |
特殊光学系 | エネルギーフィルター - 名称: In-column Omega Filter エネルギーフィルター - スリット幅: 20 eV |
撮影 | フィルム・検出器のモデル: DIRECT ELECTRON DE-20 (5k x 3k) デジタル化 - サイズ - 横: 5120 pixel / デジタル化 - サイズ - 縦: 3840 pixel / 平均露光時間: 5.0 sec. / 平均電子線量: 40.0 e/Å2 |
電子線 | 加速電圧: 200 kV / 電子線源: FIELD EMISSION GUN |
電子光学系 | C2レンズ絞り径: 40.0 µm / 倍率(補正後): 45065 / 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 4.2 mm / 最大 デフォーカス(公称値): 3.0 µm / 最小 デフォーカス(公称値): 1.0 µm / 倍率(公称値): 40000 |
試料ステージ | 試料ホルダーモデル: GATAN 626 SINGLE TILT LIQUID NITROGEN CRYO TRANSFER HOLDER ホルダー冷却材: NITROGEN |