+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-12536 | |||||||||||||||
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タイトル | Tomogram of mutant huntingtin containing organelle resembles autolysosome in 6-month-old zQ175 mice | |||||||||||||||
マップデータ | Tomogram of mHTT containing inclusion in 6 month old zQ175 mice. | |||||||||||||||
試料 |
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生物種 | Mus musculus (ハツカネズミ) | |||||||||||||||
手法 | 電子線トモグラフィー法 / ネガティブ染色法 | |||||||||||||||
データ登録者 | Zhou Y / Saibil HR | |||||||||||||||
資金援助 | 英国, 米国, 4件
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引用 | ジャーナル: Acta Neuropathol Commun / 年: 2021 タイトル: Correlative light and electron microscopy suggests that mutant huntingtin dysregulates the endolysosomal pathway in presymptomatic Huntington's disease. 著者: Ya Zhou / Thomas R Peskett / Christian Landles / John B Warner / Kirupa Sathasivam / Edward J Smith / Shu Chen / Ronald Wetzel / Hilal A Lashuel / Gillian P Bates / Helen R Saibil / 要旨: Huntington's disease (HD) is a late onset, inherited neurodegenerative disorder for which early pathogenic events remain poorly understood. Here we show that mutant exon 1 HTT proteins are recruited ...Huntington's disease (HD) is a late onset, inherited neurodegenerative disorder for which early pathogenic events remain poorly understood. Here we show that mutant exon 1 HTT proteins are recruited to a subset of cytoplasmic aggregates in the cell bodies of neurons in brain sections from presymptomatic HD, but not wild-type, mice. This occurred in a disease stage and polyglutamine-length dependent manner. We successfully adapted a high-resolution correlative light and electron microscopy methodology, originally developed for mammalian and yeast cells, to allow us to correlate light microscopy and electron microscopy images on the same brain section within an accuracy of 100 nm. Using this approach, we identified these recruitment sites as single membrane bound, vesicle-rich endolysosomal organelles, specifically as (1) multivesicular bodies (MVBs), or amphisomes and (2) autolysosomes or residual bodies. The organelles were often found in close-proximity to phagophore-like structures. Immunogold labeling localized mutant HTT to non-fibrillar, electron lucent structures within the lumen of these organelles. In presymptomatic HD, the recruitment organelles were predominantly MVBs/amphisomes, whereas in late-stage HD, there were more autolysosomes or residual bodies. Electron tomograms indicated the fusion of small vesicles with the vacuole within the lumen, suggesting that MVBs develop into residual bodies. We found that markers of MVB-related exocytosis were depleted in presymptomatic mice and throughout the disease course. This suggests that endolysosomal homeostasis has moved away from exocytosis toward lysosome fusion and degradation, in response to the need to clear the chronically aggregating mutant HTT protein, and that this occurs at an early stage in HD pathogenesis. | |||||||||||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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添付画像 |
-ダウンロードとリンク
-EMDBアーカイブ
マップデータ | emd_12536.map.gz | 2 GB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-12536-v30.xml emd-12536.xml | 10.4 KB 10.4 KB | 表示 表示 | EMDBヘッダ |
画像 | emd_12536.png | 155.3 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-12536 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-12536 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_12536_validation.pdf.gz | 202.6 KB | 表示 | EMDB検証レポート |
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文書・詳細版 | emd_12536_full_validation.pdf.gz | 201.7 KB | 表示 | |
XML形式データ | emd_12536_validation.xml.gz | 3.8 KB | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-12536 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-12536 | HTTPS FTP |
-関連構造データ
-リンク
EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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-マップ
ファイル | ダウンロード / ファイル: emd_12536.map.gz / 形式: CCP4 / 大きさ: 4.7 GB / タイプ: IMAGE STORED AS SIGNED BYTE | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | Tomogram of mHTT containing inclusion in 6 month old zQ175 mice. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 4.441 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
-試料の構成要素
-全体 : Mutant huntingtin containing organelle in hippocampal CA1 neuron ...
全体 | 名称: Mutant huntingtin containing organelle in hippocampal CA1 neuron from zQ175 knock-in mice. |
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要素 |
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-超分子 #1: Mutant huntingtin containing organelle in hippocampal CA1 neuron ...
超分子 | 名称: Mutant huntingtin containing organelle in hippocampal CA1 neuron from zQ175 knock-in mice. タイプ: tissue / ID: 1 / 親要素: 0 詳細: Cytoplasmic inclusion sites identified by correlative fluorescence/EM on freeze substituted brain sections. |
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由来(天然) | 生物種: Mus musculus (ハツカネズミ) / 株: C57BL/6J / 器官: Brain / 組織: hippocampus CA1 |
-実験情報
-構造解析
手法 | ネガティブ染色法 |
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解析 | 電子線トモグラフィー法 |
試料の集合状態 | tissue |
-試料調製
緩衝液 | pH: 7 / 詳細: MilliQ water was used. |
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染色 | タイプ: NEGATIVE / 材質: Uranyl acetate |
糖包埋 | 材質: Lowicryl HM20 詳細: High pressure frozen samples were freeze substituted in a Leica AFS |
詳細 | Brain slices were high pressure frozen and freeze substituted |
加圧凍結法 | 装置: OTHER 詳細: The value given for _emd_high_pressure_freezing.instrument is HPM100. This is not in a list of allowed values {'EMS-002 RAPID IMMERSION FREEZER', 'OTHER', 'LEICA EM PACT', 'LEICA EM HPM100', ...詳細: The value given for _emd_high_pressure_freezing.instrument is HPM100. This is not in a list of allowed values {'EMS-002 RAPID IMMERSION FREEZER', 'OTHER', 'LEICA EM PACT', 'LEICA EM HPM100', 'LEICA EM PACT2', 'BAL-TEC HPM 010'} so OTHER is written into the XML file. |
Cryo protectant | BSA |
切片作成 | ウルトラミクロトーム - 装置: Leica EM UC7 / ウルトラミクロトーム - 温度: 20 K / ウルトラミクロトーム - 最終 厚さ: 300 nm |
位置合わせマーカー | Manufacturer: EMS / 直径: 10 nm |
-電子顕微鏡法
顕微鏡 | FEI POLARA 300 |
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撮影 | フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 平均電子線量: 19.38 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: FLOOD BEAM / 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: Tecnai Polara / 画像提供: FEI Company |
-画像解析
最終 再構成 | ソフトウェア - 名称: IMOD / 使用した粒子像数: 37 |
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