+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7.0E+55 | ||||||||||||||||||
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タイトル | Cryo-EM structure of alpha 7 homo-tetradecamer | ||||||||||||||||||
要素 | Proteasome subunit alpha type-3 | ||||||||||||||||||
キーワード | LYASE / Conformational fluctuation / double-ring / proteasome / D7 symmetry / CHAPERONE | ||||||||||||||||||
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 / G2/M Checkpoints / Defective CFTR causes cystic fibrosis / 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 / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / ABC-family proteins mediated transport / 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 | 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: 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 | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 7e55.cif.gz | 55.2 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb7e55.ent.gz | 38.5 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7e55.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
文書・要旨 | 7e55_validation.pdf.gz | 809.3 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 7e55_full_validation.pdf.gz | 812.3 KB | 表示 | |
XML形式データ | 7e55_validation.xml.gz | 18.8 KB | 表示 | |
CIF形式データ | 7e55_validation.cif.gz | 26 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/e5/7e55 ftp://data.pdbj.org/pub/pdb/validation_reports/e5/7e55 | HTTPS FTP |
-関連構造データ
-リンク
-集合体
登録構造単位 |
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1 |
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2 |
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3 |
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対称性 | 点対称性: (シェーンフリース記号: D7 (2回x7回 2面回転対称)) |
-要素
#1: タンパク質 | 分子量: 28469.252 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PSMA3, HC8, PSC8 / 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: P25788 |
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Has protein modification | Y |
-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 |
-試料調製
構成要素 | 名称: Proteasome subunit alpha type-7 / タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
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由来(天然) | 生物種: Homo sapiens (ヒト) |
由来(組換発現) | 生物種: Escherichia coli (大腸菌) |
緩衝液 | pH: 7.5 |
試料 | 濃度: 1 mg/ml / 包埋: YES / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | グリッドの材料: MOLYBDENUM / グリッドのサイズ: 200 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 |
EM embedding | Material: Ice |
急速凍結 | 凍結剤: ETHANE / 湿度: 95 % / 凍結前の試料温度: 277 K |
-電子顕微鏡撮影
顕微鏡 | モデル: JEOL 2200FS |
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電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 200 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 40000 X / 倍率(補正後): 45065 X / 最大 デフォーカス(公称値): 3000 nm / 最小 デフォーカス(公称値): 1000 nm / Cs: 4.2 mm / C2レンズ絞り径: 40 µm / アライメント法: BASIC |
試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: GATAN 626 SINGLE TILT LIQUID NITROGEN CRYO TRANSFER HOLDER 最高温度: 77 K / 最低温度: 76 K |
撮影 | 平均露光時間: 5 sec. / 電子線照射量: 40 e/Å2 フィルム・検出器のモデル: DIRECT ELECTRON DE-20 (5k x 3k) |
電子光学装置 | 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 |
画像スキャン | サンプリングサイズ: 6.4 µm / 横: 5120 / 縦: 3840 / 動画フレーム数/画像: 25 |
-解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING ONLY | ||||||||||||||||||||||||||||||||
対称性 | 点対称性: D7 (2回x7回 2面回転対称) | ||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 5.9 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 18388 / アルゴリズム: BACK PROJECTION / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||
原子モデル構築 | B value: 531 / プロトコル: FLEXIBLE FIT / 空間: REAL | ||||||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 5DSV Accession code: 5DSV / Pdb chain residue range: 2-245 / Source name: PDB / タイプ: experimental model |