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基本情報
登録情報 | データベース: EMDB / ID: EMD-6482 | |||||||||
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タイトル | Cryo-electron microscopy of alpha Synuclein amyloid fibrils | |||||||||
![]() | Extruded 2D reconstruction of in vitro assembled alpha Synuclein amyoid fibrils | |||||||||
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機能・相同性 | ![]() protein binding / negative regulation of mitochondrial electron transport, NADH to ubiquinone / : / neutral lipid metabolic process / regulation of acyl-CoA biosynthetic process / negative regulation of dopamine uptake involved in synaptic transmission / negative regulation of norepinephrine uptake / positive regulation of SNARE complex assembly / positive regulation of hydrogen peroxide catabolic process / supramolecular fiber ...protein binding / negative regulation of mitochondrial electron transport, NADH to ubiquinone / : / neutral lipid metabolic process / regulation of acyl-CoA biosynthetic process / negative regulation of dopamine uptake involved in synaptic transmission / negative regulation of norepinephrine uptake / positive regulation of SNARE complex assembly / positive regulation of hydrogen peroxide catabolic process / supramolecular fiber / mitochondrial membrane organization / negative regulation of chaperone-mediated autophagy / regulation of synaptic vesicle recycling / regulation of reactive oxygen species biosynthetic process / negative regulation of platelet-derived growth factor receptor signaling pathway / positive regulation of protein localization to cell periphery / negative regulation of exocytosis / regulation of glutamate secretion / response to iron(II) ion / SNARE complex assembly / positive regulation of neurotransmitter secretion / dopamine biosynthetic process / regulation of norepinephrine uptake / transporter regulator activity / regulation of locomotion / synaptic vesicle priming / mitochondrial ATP synthesis coupled electron transport / regulation of macrophage activation / positive regulation of inositol phosphate biosynthetic process / negative regulation of microtubule polymerization / synaptic vesicle transport / positive regulation of receptor recycling / dopamine uptake involved in synaptic transmission / protein kinase inhibitor activity / dynein complex binding / regulation of dopamine secretion / negative regulation of thrombin-activated receptor signaling pathway / cuprous ion binding / positive regulation of endocytosis / positive regulation of exocytosis / response to magnesium ion / synaptic vesicle exocytosis / enzyme inhibitor activity / kinesin binding / synaptic vesicle endocytosis / regulation of presynapse assembly / response to type II interferon / cysteine-type endopeptidase inhibitor activity / negative regulation of serotonin uptake / alpha-tubulin binding / supramolecular fiber organization / inclusion body / phospholipid metabolic process / cellular response to copper ion / axon terminus / cellular response to epinephrine stimulus / Hsp70 protein binding / response to interleukin-1 / regulation of microtubule cytoskeleton organization / SNARE binding / positive regulation of release of sequestered calcium ion into cytosol / adult locomotory behavior / fatty acid binding / negative regulation of protein kinase activity / excitatory postsynaptic potential / fatty acid metabolic process / phosphoprotein binding / protein tetramerization / microglial cell activation / regulation of long-term neuronal synaptic plasticity / synapse organization / ferrous iron binding / protein destabilization / PKR-mediated signaling / phospholipid binding / receptor internalization / tau protein binding / long-term synaptic potentiation / synaptic vesicle membrane / positive regulation of inflammatory response / actin cytoskeleton / actin binding / growth cone / cell cortex / cellular response to oxidative stress / neuron apoptotic process / chemical synaptic transmission / molecular adaptor activity / negative regulation of neuron apoptotic process / response to lipopolysaccharide / histone binding / amyloid fibril formation / lysosome / oxidoreductase activity / postsynapse / transcription cis-regulatory region binding / positive regulation of apoptotic process / Amyloid fiber formation / copper ion binding / response to xenobiotic stimulus 類似検索 - 分子機能 | |||||||||
生物種 | ![]() | |||||||||
手法 | らせん対称体再構成法 / クライオ電子顕微鏡法 / 解像度: 40.0 Å | |||||||||
![]() | Dearborn AD / Wall JS / Cheng N / Heymann JB / Kajava AV / Varkey J / Langen R / Steven AC | |||||||||
![]() | ![]() タイトル: α-Synuclein Amyloid Fibrils with Two Entwined, Asymmetrically Associated Protofibrils. 著者: Altaira D Dearborn / Joseph S Wall / Naiqian Cheng / J Bernard Heymann / Andrey V Kajava / Jobin Varkey / Ralf Langen / Alasdair C Steven / ![]() ![]() ![]() 要旨: Parkinson disease and other progressive neurodegenerative conditions are characterized by the intracerebral presence of Lewy bodies, containing amyloid fibrils of α-synuclein. We used cryo-electron ...Parkinson disease and other progressive neurodegenerative conditions are characterized by the intracerebral presence of Lewy bodies, containing amyloid fibrils of α-synuclein. We used cryo-electron microscopy and scanning transmission electron microscopy (STEM) to study in vitro-assembled fibrils. These fibrils are highly polymorphic. Focusing on twisting fibrils with an inter-crossover spacing of 77 nm, our reconstructions showed them to consist of paired protofibrils. STEM mass per length data gave one subunit per 0.47 nm axial rise per protofibril, consistent with a superpleated β-structure. The STEM images show two thread-like densities running along each of these fibrils, which we interpret as ladders of metal ions. These threads confirmed the two-protofibril architecture of the 77-nm twisting fibrils and allowed us to identify this morphotype in STEM micrographs. Some other, but not all, fibril morphotypes also exhibit dense threads, implying that they also present a putative metal binding site. We propose a molecular model for the protofibril and suggest that polymorphic variant fibrils have different numbers of protofibrils that are associated differently. | |||||||||
履歴 |
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構造の表示
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構造ビューア | EMマップ: ![]() ![]() ![]() |
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マップデータ | ![]() | 13.8 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 11.1 KB 11.1 KB | 表示 表示 | ![]() |
画像 | ![]() | 54.5 KB | ||
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注釈 | Extruded 2D reconstruction of in vitro assembled alpha Synuclein amyoid fibrils | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
投影像・断面図 | 画像のコントロール
画像は Spider により作成 これらの図は立方格子座標系で作成されたものです | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 2.54 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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試料の構成要素
-全体 : In vitro assembled, recombinant amyloid fibrils of full-length hu...
全体 | 名称: In vitro assembled, recombinant amyloid fibrils of full-length human alpha Synuclein |
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要素 |
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-超分子 #1000: In vitro assembled, recombinant amyloid fibrils of full-length hu...
超分子 | 名称: In vitro assembled, recombinant amyloid fibrils of full-length human alpha Synuclein タイプ: sample / ID: 1000 / 詳細: The sample was morphologically heterogeneous. / 集合状態: dimeric asymmetric unit / Number unique components: 2 |
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分子量 | 手法: Dark-field scanning transmission electron microscopy 59.1 MDa/micron compared to 61.5 MDa/micron theoretical weight |
-分子 #1: alpha Synuclein
分子 | 名称: alpha Synuclein / タイプ: protein_or_peptide / ID: 1 / Name.synonym: NACP, PARK1 / 集合状態: Amyloid / 組換発現: Yes |
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由来(天然) | 生物種: ![]() |
組換発現 | 生物種: ![]() ![]() |
配列 | UniProtKB: Alpha-synuclein GO: magnesium ion binding, fatty acid binding, copper ion binding, calcium ion binding, protein binding InterPro: Alpha-synuclein |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | らせん対称体再構成法 |
試料の集合状態 | filament |
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試料調製
濃度 | 4 mg/mL |
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緩衝液 | pH: 7.4 / 詳細: 10 mM HEPES, 100 mM NaCl, 0.1% NaN3 |
グリッド | 詳細: R1.2/1.3 400 mesh copper Quantifoil grid, glow-discharged in argon/oxygen |
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 90 % / チャンバー内温度: 90 K / 装置: LEICA KF80 / 手法: Manually blotted before plunging |
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電子顕微鏡法
顕微鏡 | FEI/PHILIPS CM200FEG |
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日付 | 2012年6月5日 |
撮影 | カテゴリ: FILM / フィルム・検出器のモデル: KODAK SO-163 FILM デジタル化 - スキャナー: NIKON SUPER COOLSCAN 9000 デジタル化 - サンプリング間隔: 6.35 µm / 実像数: 110 / 平均電子線量: 15 e/Å2 / ビット/ピクセル: 16 |
電子線 | 加速電圧: 120 kV / 電子線源: ![]() |
電子光学系 | 倍率(補正後): 51840 / 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): 3.5 µm / 最小 デフォーカス(公称値): 2.0 µm / 倍率(公称値): 50000 |
試料ステージ | 試料ホルダーモデル: GATAN LIQUID NITROGEN |
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画像解析
詳細 | The 2D reconstructions were made and aligned using bhelcross. The helical parameters were determined per fibril in real space and imposed on the average using bhelcross. |
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最終 再構成 | 想定した対称性 - らせんパラメータ - Δz: 4.7 Å 想定した対称性 - らせんパラメータ - ΔΦ: 1.1 ° 想定した対称性 - らせんパラメータ - 軸対称性: C1 (非対称) 解像度のタイプ: BY AUTHOR / 解像度: 40.0 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: Bsoft 詳細: Extruded from a 2D reconstruction based upon helical parameters |
CTF補正 | 詳細: phase-flipped micrograph |