positive regulation of glutamate receptor signaling pathway / regulation of calcium ion import across plasma membrane / aspartic-type endopeptidase inhibitor activity / glycosaminoglycan binding / type 5 metabotropic glutamate receptor binding / negative regulation of interleukin-17 production / negative regulation of dendritic spine maintenance / cupric ion binding / regulation of potassium ion transmembrane transport / negative regulation of calcineurin-NFAT signaling cascade ...positive regulation of glutamate receptor signaling pathway / regulation of calcium ion import across plasma membrane / aspartic-type endopeptidase inhibitor activity / glycosaminoglycan binding / type 5 metabotropic glutamate receptor binding / negative regulation of interleukin-17 production / negative regulation of dendritic spine maintenance / cupric ion binding / regulation of potassium ion transmembrane transport / negative regulation of calcineurin-NFAT signaling cascade / negative regulation of interleukin-2 production / negative regulation of T cell receptor signaling pathway / negative regulation of activated T cell proliferation / negative regulation of amyloid-beta formation / cuprous ion binding / negative regulation of type II interferon production / positive regulation of protein targeting to membrane / side of membrane / inclusion body / cellular response to copper ion / neuron projection maintenance / positive regulation of calcium-mediated signaling / molecular function activator activity / positive regulation of protein localization to plasma membrane / molecular condensate scaffold activity / protein destabilization / terminal bouton / protein homooligomerization / cellular response to amyloid-beta / positive regulation of neuron apoptotic process / cellular response to xenobiotic stimulus / signaling receptor activity / presynapse / amyloid-beta binding / protease binding / microtubule binding / nuclear membrane / response to oxidative stress / amyloid fibril formation / learning or memory / regulation of cell cycle / membrane raft / copper ion binding / dendrite / protein-containing complex binding / negative regulation of apoptotic process / cell surface / endoplasmic reticulum / Golgi apparatus / identical protein binding / plasma membrane / cytosol 類似検索 - 分子機能
Prion, copper binding octapeptide repeat / Copper binding octapeptide repeat region / Major prion protein N-terminal domain / Major prion protein bPrPp - N terminal / Prion protein signature 1. / Prion protein signature 2. / Prion protein / Major prion protein / Prion/Doppel protein, beta-ribbon domain / Prion/Doppel beta-ribbon domain superfamily / Prion/Doppel alpha-helical domain 類似検索 - ドメイン・相同性
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI000580
米国
Other private
米国
引用
ジャーナル: Mol Cell / 年: 2021 タイトル: High-resolution structure and strain comparison of infectious mammalian prions. 著者: Allison Kraus / Forrest Hoyt / Cindi L Schwartz / Bryan Hansen / Efrosini Artikis / Andrew G Hughson / Gregory J Raymond / Brent Race / Gerald S Baron / Byron Caughey / 要旨: Within the extensive range of self-propagating pathologic protein aggregates of mammals, prions are the most clearly infectious (e.g., ∼10 lethal doses per milligram). The structures of such lethal ...Within the extensive range of self-propagating pathologic protein aggregates of mammals, prions are the most clearly infectious (e.g., ∼10 lethal doses per milligram). The structures of such lethal assemblies of PrP molecules have been poorly understood. Here we report a near-atomic core structure of a brain-derived, fully infectious prion (263K strain). Cryo-electron microscopy showed amyloid fibrils assembled with parallel in-register intermolecular β sheets. Each monomer provides one rung of the ordered fibril core, with N-linked glycans and glycolipid anchors projecting outward. Thus, single monomers form the templating surface for incoming monomers at fibril ends, where prion growth occurs. Comparison to another prion strain (aRML) revealed major differences in fibril morphology but, like 263K, an asymmetric fibril cross-section without paired protofilaments. These findings provide structural insights into prion propagation, strains, species barriers, and membrane pathogenesis. This structure also helps frame considerations of factors influencing the relative transmissibility of other pathologic amyloids.
凍結剤: ETHANE / チャンバー内湿度: 90 % / チャンバー内温度: 295 K / 装置: LEICA EM GP
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電子顕微鏡法
顕微鏡
FEI TITAN KRIOS
撮影
フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 平均電子線量: 60.0 e/Å2
電子線
加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN
電子光学系
照射モード: OTHER / 撮影モード: BRIGHT FIELD
試料ステージ
ホルダー冷却材: NITROGEN
実験機器
モデル: Titan Krios / 画像提供: FEI Company
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画像解析
詳細
Processing and reconstruction was conducted in Relion as per Scheres, Acta Cryst. (2020). D76, 94-101
粒子像選択
選択した数: 337368 詳細: Filament start and end positions were picked manually in RELION. Particles were extracted with an interbox distance of 14.7A along the filament axis.
初期モデル
モデルのタイプ: OTHER
最終 再構成
想定した対称性 - 点群: C1 (非対称) / アルゴリズム: FOURIER SPACE / 解像度のタイプ: BY AUTHOR / 解像度: 3.14 Å / 解像度の算出法: FSC 0.143 CUT-OFF / ソフトウェア - 名称: RELION (ver. 3.1) ソフトウェア - 詳細: RELION was used for 2D and 3D classification of particles, refinement, Bayesian polishing and post-processing with a soft-edged mask. 詳細: Auto-refinement was then performed while optimizing the helical twist and rise. Auto-refinement with refinement of twist and rise yielded a final map with a twist of -0.847 degree and rise of ...詳細: Auto-refinement was then performed while optimizing the helical twist and rise. Auto-refinement with refinement of twist and rise yielded a final map with a twist of -0.847 degree and rise of 4.874 angstrom. Iterative cycles of CTF refinement, Bayesian polishing, and auto refinement were used until resolution estimates stabilized. Post processing in RELION was performed with a soft-edged mask representing 10% of the central Z length of the fibril. Sharpening was applied with a B-factor of -31 square angstrom. 使用した粒子像数: 15884
初期 角度割当
タイプ: MAXIMUM LIKELIHOOD / ソフトウェア - 名称: RELION (ver. 3.1)
最終 角度割当
タイプ: MAXIMUM LIKELIHOOD / ソフトウェア - 名称: RELION (ver. 3.1)