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基本情報
登録情報 | データベース: EMDB / ID: EMD-3851 | |||||||||
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タイトル | Near-atomic resolution fibril structure of complete amyloid-beta(1-42) by cryo-EM | |||||||||
![]() | The density map was sharpened by a B-factor of -50 Ang^2 and filtered to 3.5 Ang. This density map was used for model building and refinement. | |||||||||
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![]() | amyloid / fibril / aggregation / Alzheimer's disease / Protein fibril | |||||||||
機能・相同性 | ![]() amyloid-beta complex / growth cone lamellipodium / cellular response to norepinephrine stimulus / growth cone filopodium / microglia development / collateral sprouting in absence of injury / Formyl peptide receptors bind formyl peptides and many other ligands / regulation of synapse structure or activity / axo-dendritic transport / regulation of Wnt signaling pathway ...amyloid-beta complex / growth cone lamellipodium / cellular response to norepinephrine stimulus / growth cone filopodium / microglia development / collateral sprouting in absence of injury / Formyl peptide receptors bind formyl peptides and many other ligands / regulation of synapse structure or activity / axo-dendritic transport / regulation of Wnt signaling pathway / axon midline choice point recognition / astrocyte activation involved in immune response / NMDA selective glutamate receptor signaling pathway / regulation of spontaneous synaptic transmission / mating behavior / growth factor receptor binding / peptidase activator activity / Golgi-associated vesicle / PTB domain binding / Lysosome Vesicle Biogenesis / positive regulation of amyloid fibril formation / Insertion of tail-anchored proteins into the endoplasmic reticulum membrane / astrocyte projection / neuron remodeling / Deregulated CDK5 triggers multiple neurodegenerative pathways in Alzheimer's disease models / nuclear envelope lumen / positive regulation of protein metabolic process / dendrite development / TRAF6 mediated NF-kB activation / modulation of excitatory postsynaptic potential / signaling receptor activator activity / Advanced glycosylation endproduct receptor signaling / The NLRP3 inflammasome / negative regulation of long-term synaptic potentiation / transition metal ion binding / main axon / regulation of multicellular organism growth / intracellular copper ion homeostasis / regulation of presynapse assembly / ECM proteoglycans / positive regulation of T cell migration / neuronal dense core vesicle / Purinergic signaling in leishmaniasis infection / positive regulation of chemokine production / cellular response to manganese ion / clathrin-coated pit / Notch signaling pathway / extracellular matrix organization / neuron projection maintenance / Mitochondrial protein degradation / astrocyte activation / ionotropic glutamate receptor signaling pathway / axonogenesis / response to interleukin-1 / positive regulation of mitotic cell cycle / positive regulation of calcium-mediated signaling / protein serine/threonine kinase binding / cellular response to copper ion / platelet alpha granule lumen / positive regulation of glycolytic process / cellular response to cAMP / adult locomotory behavior / central nervous system development / positive regulation of long-term synaptic potentiation / positive regulation of interleukin-1 beta production / trans-Golgi network membrane / endosome lumen / dendritic shaft / TAK1-dependent IKK and NF-kappa-B activation / learning / positive regulation of JNK cascade / Post-translational protein phosphorylation / locomotory behavior / microglial cell activation / serine-type endopeptidase inhibitor activity / regulation of long-term neuronal synaptic plasticity / positive regulation of non-canonical NF-kappaB signal transduction / synapse organization / visual learning / cellular response to nerve growth factor stimulus / recycling endosome / positive regulation of interleukin-6 production / response to lead ion / Golgi lumen / cognition / endocytosis / Regulation of Insulin-like Growth Factor (IGF) transport and uptake by Insulin-like Growth Factor Binding Proteins (IGFBPs) / positive regulation of inflammatory response / cellular response to amyloid-beta / neuron projection development / positive regulation of tumor necrosis factor production / Platelet degranulation / heparin binding / regulation of gene expression / regulation of translation / early endosome membrane / G alpha (i) signalling events / perikaryon / G alpha (q) signalling events / dendritic spine 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: 4.0 Å | |||||||||
![]() | Gremer L / Schoelzel D | |||||||||
![]() | ![]() タイトル: Fibril structure of amyloid-β(1-42) by cryo-electron microscopy. 著者: Lothar Gremer / Daniel Schölzel / Carla Schenk / Elke Reinartz / Jörg Labahn / Raimond B G Ravelli / Markus Tusche / Carmen Lopez-Iglesias / Wolfgang Hoyer / Henrike Heise / Dieter Willbold ...著者: Lothar Gremer / Daniel Schölzel / Carla Schenk / Elke Reinartz / Jörg Labahn / Raimond B G Ravelli / Markus Tusche / Carmen Lopez-Iglesias / Wolfgang Hoyer / Henrike Heise / Dieter Willbold / Gunnar F Schröder / ![]() ![]() 要旨: Amyloids are implicated in neurodegenerative diseases. Fibrillar aggregates of the amyloid-β protein (Aβ) are the main component of the senile plaques found in brains of Alzheimer's disease ...Amyloids are implicated in neurodegenerative diseases. Fibrillar aggregates of the amyloid-β protein (Aβ) are the main component of the senile plaques found in brains of Alzheimer's disease patients. We present the structure of an Aβ(1-42) fibril composed of two intertwined protofilaments determined by cryo-electron microscopy (cryo-EM) to 4.0-angstrom resolution, complemented by solid-state nuclear magnetic resonance experiments. The backbone of all 42 residues and nearly all side chains are well resolved in the EM density map, including the entire N terminus, which is part of the cross-β structure resulting in an overall "LS"-shaped topology of individual subunits. The dimer interface protects the hydrophobic C termini from the solvent. The characteristic staggering of the nonplanar subunits results in markedly different fibril ends, termed "groove" and "ridge," leading to different binding pathways on both fibril ends, which has implications for fibril growth. | |||||||||
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 | ![]() | 36.1 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 15.9 KB 15.9 KB | 表示 表示 | ![]() |
FSC (解像度算出) | ![]() | 7.7 KB | 表示 | ![]() |
画像 | ![]() | 147.8 KB | ||
Filedesc metadata | ![]() | 5.5 KB | ||
その他 | ![]() ![]() | 13.5 MB 13.5 MB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-検証レポート
文書・要旨 | ![]() | 385 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 384.1 KB | 表示 | |
XML形式データ | ![]() | 13.4 KB | 表示 | |
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-関連構造データ
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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 | The density map was sharpened by a B-factor of -50 Ang^2 and filtered to 3.5 Ang. This density map was used for model building and refinement. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 0.935 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 : Beta-amyloid protein 42 fibrils
全体 | 名称: Beta-amyloid protein 42 fibrils |
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要素 |
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-超分子 #1: Beta-amyloid protein 42 fibrils
超分子 | 名称: Beta-amyloid protein 42 fibrils / 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: ![]() |
-分子 #1: Amyloid beta A4 protein
分子 | 名称: Amyloid beta A4 protein / タイプ: protein_or_peptide / ID: 1 / コピー数: 9 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 4.520087 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: DAEFRHDSGY EVHHQKLVFF AEDVGSNKGA IIGLMVGGVV IA UniProtKB: Amyloid-beta precursor protein |
-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
緩衝液 | pH: 2 構成要素:
詳細: in water | ||||||
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グリッド | モデル: UltrAuFoil R 1.2/1.3 Quantifoil / 材質: GOLD / メッシュ: 300 / 前処理 - タイプ: GLOW DISCHARGE | ||||||
凍結 | 凍結剤: ETHANE / 装置: FEI VITROBOT MARK IV 詳細: 2.5 microL sample was applied to the grid, blotted for 2.5 s before plunging.. |
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電子顕微鏡法
顕微鏡 | FEI TECNAI ARCTICA |
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撮影 | フィルム・検出器のモデル: FEI FALCON III (4k x 4k) 検出モード: INTEGRATING / 撮影したグリッド数: 1 / 実像数: 2026 / 平均露光時間: 2.0 sec. / 平均電子線量: 24.0 e/Å2 |
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: 2.7 mm / 倍率(公称値): 110000 |
実験機器 | ![]() モデル: Talos Arctica / 画像提供: FEI Company |
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画像解析
最終 再構成 | 使用したクラス数: 1 想定した対称性 - らせんパラメータ - Δz: 2.335 Å 想定した対称性 - らせんパラメータ - ΔΦ: -179.275 ° 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: 4.0 Å / 解像度の算出法: FSC 0.143 CUT-OFF / ソフトウェア - 名称: SPARX (ver. 4.0) 詳細: For the even/odd test, the fibrils were split after the final reconstruction (no gold-standard). These two half sets were then refined further independently for another 12 iterations. 使用した粒子像数: 127765 |
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初期モデル | モデルのタイプ: OTHER / 詳細: noise-filled cylinder |
最終 角度割当 | タイプ: NOT APPLICABLE / ソフトウェア - 名称: SPARX (ver. 4.0) / ソフトウェア - 詳細: sxheliconlocal.py |
-原子モデル構築 1
精密化 | 空間: REAL / プロトコル: AB INITIO MODEL 当てはまり具合の基準: Cross-correlation coefficient |
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得られたモデル | ![]() PDB-5oqv: |