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基本情報
登録情報 | データベース: PDB / ID: 2c7d | ||||||
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タイトル | Fitted coordinates for GroEL-ADP7-GroES Cryo-EM complex (EMD-1181) | ||||||
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![]() | CHAPERONE / ATP-BINDING / ATOMIC STRUCTURE FITTING / CELL CYCLE / CELL DIVISION / CHAPERONIN / NUCLEOTIDE-BINDING / PHOSPHORYLATION | ||||||
機能・相同性 | ![]() GroEL-GroES complex / chaperonin ATPase / virion assembly / : / protein folding chaperone / isomerase activity / ATP-dependent protein folding chaperone / response to radiation / unfolded protein binding / protein folding ...GroEL-GroES complex / chaperonin ATPase / virion assembly / : / protein folding chaperone / isomerase activity / ATP-dependent protein folding chaperone / response to radiation / unfolded protein binding / protein folding / protein-folding chaperone binding / response to heat / protein refolding / magnesium ion binding / ATP hydrolysis activity / ATP binding / metal ion binding / identical protein binding / membrane / cytosol 類似検索 - 分子機能 | ||||||
生物種 | ![]() ![]() | ||||||
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: 8.7 Å | ||||||
![]() | Ranson, N.A. / Clare, D.K. / Farr, G.W. / Houldershaw, D. / Horwich, A.L. / Saibil, H.R. | ||||||
![]() | ![]() タイトル: Allosteric signaling of ATP hydrolysis in GroEL-GroES complexes. 著者: Neil A Ranson / Daniel K Clare / George W Farr / David Houldershaw / Arthur L Horwich / Helen R Saibil / ![]() 要旨: The double-ring chaperonin GroEL and its lid-like cochaperonin GroES form asymmetric complexes that, in the ATP-bound state, mediate productive folding in a hydrophilic, GroES-encapsulated chamber, ...The double-ring chaperonin GroEL and its lid-like cochaperonin GroES form asymmetric complexes that, in the ATP-bound state, mediate productive folding in a hydrophilic, GroES-encapsulated chamber, the so-called cis cavity. Upon ATP hydrolysis within the cis ring, the asymmetric complex becomes able to accept non-native polypeptides and ATP in the open, trans ring. Here we have examined the structural basis for this allosteric switch in activity by cryo-EM and single-particle image processing. ATP hydrolysis does not change the conformation of the cis ring, but its effects are transmitted through an inter-ring contact and cause domain rotations in the mobile trans ring. These rigid-body movements in the trans ring lead to disruption of its intra-ring contacts, expansion of the entire ring and opening of both the nucleotide pocket and the substrate-binding domains, admitting ATP and new substrate protein. | ||||||
履歴 |
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Remark 700 | SHEET THE SHEET STRUCTURE OF THIS MOLECULE IS BIFURCATED. IN ORDER TO REPRESENT THIS FEATURE IN ... SHEET THE SHEET STRUCTURE OF THIS MOLECULE IS BIFURCATED. IN ORDER TO REPRESENT THIS FEATURE IN THE SHEET RECORDS BELOW, TWO SHEETS ARE DEFINED. |
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構造の表示
ムービー |
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構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 1.2 MB | 表示 | ![]() |
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PDB形式 | ![]() | 975.4 KB | 表示 | ![]() |
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アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-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
#1: タンパク質 | 分子量: 57260.504 Da / 分子数: 14 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() ![]() #2: タンパク質 | 分子量: 10400.938 Da / 分子数: 7 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() ![]() |
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-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: GROEL-ADP7-GROES / タイプ: COMPLEX |
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緩衝液 | 名称: 12.5MM HEPES, 5MM KCL, 5MM MGCL2 / pH: 7.5 / 詳細: 12.5MM HEPES, 5MM KCL, 5MM MGCL2 |
試料 | 濃度: 1 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | 詳細: HOLEY CARBON |
急速凍結 | 凍結剤: ETHANE / 詳細: LIQUID ETHANE |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Tecnai F20 / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TECNAI F20 |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 50000 X / 最大 デフォーカス(公称値): 3300 nm / 最小 デフォーカス(公称値): 1400 nm / Cs: 2 mm |
試料ホルダ | 温度: 100 K |
撮影 | 電子線照射量: 15 e/Å2 / フィルム・検出器のモデル: KODAK SO-163 FILM |
画像スキャン | デジタル画像の数: 66 |
放射波長 | 相対比: 1 |
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解析
EMソフトウェア |
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CTF補正 | 詳細: FULL CORRECTION ON 2D CLASS AVERAGES | ||||||||||||
対称性 | 点対称性: C7 (7回回転対称) | ||||||||||||
3次元再構成 | 手法: PROJECTION MATCHING-BASED ANGULAR REFINEMENT OF MSA GENERATED CLASSES. ITERATIVE ALGEBRAIC RECONSTRUCTION IN SPIDER. 解像度: 8.7 Å / 粒子像の数: 7591 / ピクセルサイズ(公称値): 1.4 Å 詳細: RECIPROCAL SPACE FITTING OF SEVEN SEVEN INDEPENDENT RIGID BODIES WITH URO. FITTED ENTITIES WERE GROEL EQUATORIAL (RESIDUES 3-136 AND 410-524), INTERMEDIATE (RESIDUES 137-192 AND 374-409) AND ...詳細: RECIPROCAL SPACE FITTING OF SEVEN SEVEN INDEPENDENT RIGID BODIES WITH URO. FITTED ENTITIES WERE GROEL EQUATORIAL (RESIDUES 3-136 AND 410-524), INTERMEDIATE (RESIDUES 137-192 AND 374-409) AND APICAL (RESIDUES 192-373) DOMAINS, PLUS A GROES SUBUNIT. THE MAP INTO WHICH THESE COORDINATES WERE FITTED IS AVAILABLE AT THE EMD (EMD-1181) 対称性のタイプ: POINT | ||||||||||||
原子モデル構築 | プロトコル: OTHER / 詳細: METHOD--RECIPROCAL SPACE FITTING IN URO | ||||||||||||
原子モデル構築 | PDB-ID: 1AON Accession code: 1AON / Source name: PDB / タイプ: experimental model | ||||||||||||
精密化 | 最高解像度: 8.7 Å | ||||||||||||
精密化ステップ | サイクル: LAST / 最高解像度: 8.7 Å
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