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基本情報
登録情報 | データベース: EMDB / ID: EMD-2947 | |||||||||
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タイトル | Cryo-electron microscopy structure of the occupied population of CCT5 complexes (mutant huntington oligomer subtrate) | |||||||||
![]() | Single particle tomography reconstruction of CCT5 complex with mutant huntingtin encapsulated within its cavity. | |||||||||
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![]() | chaperonin / Huntington's disease / protein aggregation | |||||||||
機能・相同性 | ![]() positive regulation of CAMKK-AMPK signaling cascade / microtubule-based transport / vocal learning / positive regulation of inositol 1,4,5-trisphosphate-sensitive calcium-release channel activity / positive regulation of mitophagy / regulation of CAMKK-AMPK signaling cascade / positive regulation of protein localization to Cajal body / positive regulation of telomerase RNA localization to Cajal body / profilin binding / chaperonin-containing T-complex ...positive regulation of CAMKK-AMPK signaling cascade / microtubule-based transport / vocal learning / positive regulation of inositol 1,4,5-trisphosphate-sensitive calcium-release channel activity / positive regulation of mitophagy / regulation of CAMKK-AMPK signaling cascade / positive regulation of protein localization to Cajal body / positive regulation of telomerase RNA localization to Cajal body / profilin binding / chaperonin-containing T-complex / : / BBSome-mediated cargo-targeting to cilium / vesicle transport along microtubule / positive regulation of cilium assembly / Formation of tubulin folding intermediates by CCT/TriC / Folding of actin by CCT/TriC / binding of sperm to zona pellucida / retrograde vesicle-mediated transport, Golgi to endoplasmic reticulum / Prefoldin mediated transfer of substrate to CCT/TriC / positive regulation of aggrephagy / positive regulation of lipophagy / dynein intermediate chain binding / Golgi organization / beta-tubulin binding / Association of TriC/CCT with target proteins during biosynthesis / establishment of mitotic spindle orientation / dynactin binding / phosphoprotein phosphatase activity / Regulation of MECP2 expression and activity / postsynaptic cytosol / presynaptic cytosol / inclusion body / : / heat shock protein binding / positive regulation of telomere maintenance via telomerase / centriole / protein folding chaperone / cytoplasmic vesicle membrane / autophagosome / mRNA 3'-UTR binding / negative regulation of extrinsic apoptotic signaling pathway / ATP-dependent protein folding chaperone / protein destabilization / response to virus / kinase binding / mRNA 5'-UTR binding / p53 binding / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / unfolded protein binding / late endosome / G-protein beta-subunit binding / protein folding / cell body / microtubule / transmembrane transporter binding / early endosome / protein stabilization / positive regulation of apoptotic process / axon / apoptotic process / centrosome / dendrite / perinuclear region of cytoplasm / endoplasmic reticulum / Golgi apparatus / protein-containing complex / ATP hydrolysis activity / extracellular exosome / nucleoplasm / ATP binding / identical protein binding / nucleus / cytosol / cytoplasm 類似検索 - 分子機能 | |||||||||
生物種 | ![]() | |||||||||
手法 | サブトモグラム平均法 / クライオ電子顕微鏡法 | |||||||||
![]() | Darrow MC / Sergeeva OA / Isas JM / Galaz-Montoya J / King JA / Langen R / Schmid MF / Chiu W | |||||||||
![]() | ジャーナル: J Biol Chem / 年: 2014 タイトル: Biochemical characterization of mutants in chaperonin proteins CCT4 and CCT5 associated with hereditary sensory neuropathy. 著者: Oksana A Sergeeva / Meme T Tran / Cameron Haase-Pettingell / Jonathan A King / ![]() 要旨: Hereditary sensory neuropathies are a class of disorders marked by degeneration of the nerve fibers in the sensory periphery neurons. Recently, two mutations were identified in the subunits of the ...Hereditary sensory neuropathies are a class of disorders marked by degeneration of the nerve fibers in the sensory periphery neurons. Recently, two mutations were identified in the subunits of the eukaryotic cytosolic chaperonin TRiC, a protein machine responsible for folding actin and tubulin in the cell. C450Y CCT4 was identified in a stock of Sprague-Dawley rats, whereas H147R CCT5 was found in a human Moroccan family. As with many genetically identified mutations associated with neuropathies, the underlying molecular basis of the mutants was not defined. We investigated the biochemical properties of these mutants using an expression system in Escherichia coli that produces homo-oligomeric rings of CCT4 and CCT5. Full-length versions of both mutant protein chains were expressed in E. coli at levels approaching that of the WT chains. Sucrose gradient centrifugation revealed chaperonin-sized complexes of both WT and mutant chaperonins, but with reduced recovery of C450Y CCT4 soluble subunits. Electron microscopy of negatively stained samples of C450Y CCT4 revealed few ring-shaped species, whereas WT CCT4, H147R CCT5, and WT CCT5 revealed similar ring structures. CCT5 complexes were assayed for their ability to suppress aggregation of and refold the model substrate γd-crystallin, suppress aggregation of mutant huntingtin, and refold the physiological substrate β-actin in vitro. H147R CCT5 was not as efficient in chaperoning these substrates as WT CCT5. The subtle effects of these mutations are consistent with the homozygous disease phenotype, in which most functions are carried out during development and adulthood, but some selective function is lost or reduced. | |||||||||
履歴 |
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構造の表示
ムービー |
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構造ビューア | EMマップ: ![]() ![]() ![]() |
添付画像 |
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マップデータ | ![]() | 1.3 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 15.3 KB 15.3 KB | 表示 表示 | ![]() |
画像 | ![]() | 128.1 MB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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リンク
EMDBのページ | ![]() ![]() |
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「今月の分子」の関連する項目 |
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マップ
ファイル | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | Single particle tomography reconstruction of CCT5 complex with mutant huntingtin encapsulated within its cavity. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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: 4.704 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
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試料の構成要素
-全体 : CCT5 complex with encapsulated oligomeric mutant huntingtin exon 1.
全体 | 名称: CCT5 complex with encapsulated oligomeric mutant huntingtin exon 1. |
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要素 |
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-超分子 #1000: CCT5 complex with encapsulated oligomeric mutant huntingtin exon 1.
超分子 | 名称: CCT5 complex with encapsulated oligomeric mutant huntingtin exon 1. タイプ: sample / ID: 1000 集合状態: 16 CCT5 subunits make up one CCT5 complex, which encapsulates a hetergeneous mixture of mutant huntingtin oligomeric species. Number unique components: 2 |
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-分子 #1: chaperonin containing TCP1, subunit 5 (epsilon) complex
分子 | 名称: chaperonin containing TCP1, subunit 5 (epsilon) complex タイプ: protein_or_peptide / ID: 1 / Name.synonym: CCT5 Complex / 集合状態: Hexadecamer / 組換発現: Yes |
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由来(天然) | 生物種: ![]() |
分子量 | 実験値: 1.0 MDa / 理論値: 960 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | UniProtKB: T-complex protein 1 subunit epsilon / GO: chaperonin-containing T-complex, protein folding / InterPro: Chaperonin Cpn60/GroEL/TCP-1 family |
-分子 #2: mutant huntington exon 1
分子 | 名称: mutant huntington exon 1 / タイプ: protein_or_peptide / ID: 2 / Name.synonym: mHttQ46-Ex1-His / 集合状態: Heterogeneous / 組換発現: Yes |
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由来(天然) | 生物種: ![]() |
分子量 | 実験値: 1.4 KDa / 理論値: 1.39 KDa |
組換発現 | 生物種: ![]() |
配列 | UniProtKB: Huntingtin / InterPro: Huntingtin |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | サブトモグラム平均法 |
試料の集合状態 | particle |
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試料調製
濃度 | 0.8 mg/mL |
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緩衝液 | pH: 8 / 詳細: 20 mM Tris, 150 mM NaCl, 1 mM DTT, 1% glycerol |
グリッド | 詳細: 200 mesh Quantifoil copper grid R 2/2 holey carbon support, glow discharged |
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 85 % / チャンバー内温度: 95 K / 装置: FEI VITROBOT MARK III 手法: 1x or 2x double sided blotting for 1 or 2 second each blot before plunging. |
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電子顕微鏡法 #1
Microscopy ID | 1 |
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顕微鏡 | JEOL 2200FS |
温度 | 平均: 95 K |
特殊光学系 | エネルギーフィルター - 名称: Gatan エネルギーフィルター - エネルギー下限: 0.0 eV エネルギーフィルター - エネルギー上限: 25.0 eV |
日付 | 2014年2月12日 |
撮影 | カテゴリ: CCD フィルム・検出器のモデル: GATAN ULTRASCAN 4000 (4k x 4k) 平均電子線量: 2.0 e/Å2 / カメラ長: 1200 |
電子線 | 加速電圧: 200 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.0 mm / 最大 デフォーカス(公称値): 5.0 µm / 最小 デフォーカス(公称値): 5.0 µm / 倍率(公称値): 25000 |
試料ステージ | 試料ホルダー: LN2 cooled / 試料ホルダーモデル: GATAN LIQUID NITROGEN / Tilt series - Axis1 - Min angle: -55 ° / Tilt series - Axis1 - Max angle: 55 ° |
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電子顕微鏡法 #2
Microscopy ID | 2 |
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顕微鏡 | JEOL 2200FS |
温度 | 平均: 95 K |
特殊光学系 | エネルギーフィルター - 名称: Gatan エネルギーフィルター - エネルギー下限: 0.0 eV エネルギーフィルター - エネルギー上限: 25.0 eV |
日付 | 2013年10月31日 |
撮影 | カテゴリ: CCD フィルム・検出器のモデル: GATAN ULTRASCAN 4000 (4k x 4k) 平均電子線量: 2.0 e/Å2 / カメラ長: 1200 |
電子線 | 加速電圧: 200 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.0 mm / 最大 デフォーカス(公称値): 5.0 µm / 最小 デフォーカス(公称値): 5.0 µm / 倍率(公称値): 25000 |
試料ステージ | 試料ホルダー: LN2 cooled / 試料ホルダーモデル: GATAN LIQUID NITROGEN / Tilt series - Axis1 - Min angle: -55 ° / Tilt series - Axis1 - Max angle: 55 ° |
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画像解析
詳細 | Subvolumes were manually selected using IMOD for coordinates and EMAN2 for boxing. Further processing was completed in EMAN2. |
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最終 再構成 | 想定した対称性 - 点群: C1 (非対称) / アルゴリズム: OTHER / ソフトウェア - 名称: ![]() |