+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 8a7t | ||||||||||||
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タイトル | beta-2-microglobulin D76N amyloid fibril form 2PFa | ||||||||||||
要素 | Beta-2-microglobulin | ||||||||||||
キーワード | PROTEIN FIBRIL / Amyloid / fibril / helical / cross-beta / dialysis-related amyloidosis / b2m / polymorph | ||||||||||||
機能・相同性 | 機能・相同性情報 positive regulation of ferrous iron binding / positive regulation of transferrin receptor binding / positive regulation of receptor binding / early endosome lumen / Nef mediated downregulation of MHC class I complex cell surface expression / negative regulation of receptor binding / DAP12 interactions / cellular response to iron ion / Endosomal/Vacuolar pathway / Antigen Presentation: Folding, assembly and peptide loading of class I MHC ...positive regulation of ferrous iron binding / positive regulation of transferrin receptor binding / positive regulation of receptor binding / early endosome lumen / Nef mediated downregulation of MHC class I complex cell surface expression / negative regulation of receptor binding / DAP12 interactions / cellular response to iron ion / Endosomal/Vacuolar pathway / Antigen Presentation: Folding, assembly and peptide loading of class I MHC / cellular response to iron(III) ion / antigen processing and presentation of exogenous protein antigen via MHC class Ib, TAP-dependent / negative regulation of forebrain neuron differentiation / regulation of erythrocyte differentiation / peptide antigen assembly with MHC class I protein complex / ER to Golgi transport vesicle membrane / regulation of iron ion transport / response to molecule of bacterial origin / MHC class I peptide loading complex / HFE-transferrin receptor complex / T cell mediated cytotoxicity / positive regulation of T cell cytokine production / antigen processing and presentation of endogenous peptide antigen via MHC class I / MHC class I protein complex / negative regulation of neurogenesis / positive regulation of receptor-mediated endocytosis / peptide antigen assembly with MHC class II protein complex / multicellular organismal-level iron ion homeostasis / MHC class II protein complex / cellular response to nicotine / specific granule lumen / positive regulation of cellular senescence / positive regulation of T cell mediated cytotoxicity / recycling endosome membrane / phagocytic vesicle membrane / peptide antigen binding / antigen processing and presentation of exogenous peptide antigen via MHC class II / negative regulation of epithelial cell proliferation / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / positive regulation of immune response / Interferon gamma signaling / Modulation by Mtb of host immune system / positive regulation of T cell activation / sensory perception of smell / negative regulation of neuron projection development / positive regulation of protein binding / tertiary granule lumen / DAP12 signaling / MHC class II protein complex binding / late endosome membrane / iron ion transport / ER-Phagosome pathway / T cell differentiation in thymus / early endosome membrane / protein refolding / protein homotetramerization / intracellular iron ion homeostasis / amyloid fibril formation / learning or memory / Amyloid fiber formation / endoplasmic reticulum lumen / lysosomal membrane / Golgi membrane / external side of plasma membrane / focal adhesion / Neutrophil degranulation / SARS-CoV-2 activates/modulates innate and adaptive immune responses / structural molecule activity / Golgi apparatus / endoplasmic reticulum / protein homodimerization activity / extracellular space / extracellular exosome / extracellular region / identical protein binding / membrane / plasma membrane / cytosol 類似検索 - 分子機能 | ||||||||||||
生物種 | Homo sapiens (ヒト) | ||||||||||||
手法 | 電子顕微鏡法 / らせん対称体再構成法 / クライオ電子顕微鏡法 / 解像度: 3 Å | ||||||||||||
データ登録者 | Wilkinson, M. / Gallardo, R. / Radford, S.E. / Ranson, N.A. | ||||||||||||
資金援助 | 英国, 3件
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引用 | ジャーナル: Nat Commun / 年: 2023 タイトル: Disease-relevant β-microglobulin variants share a common amyloid fold. 著者: Martin Wilkinson / Rodrigo U Gallardo / Roberto Maya Martinez / Nicolas Guthertz / Masatomo So / Liam D Aubrey / Sheena E Radford / Neil A Ranson / 要旨: β-microglobulin (βm) and its truncated variant ΔΝ6 are co-deposited in amyloid fibrils in the joints, causing the disorder dialysis-related amyloidosis (DRA). Point mutations of βm result in ...β-microglobulin (βm) and its truncated variant ΔΝ6 are co-deposited in amyloid fibrils in the joints, causing the disorder dialysis-related amyloidosis (DRA). Point mutations of βm result in diseases with distinct pathologies. βm-D76N causes a rare systemic amyloidosis with protein deposited in the viscera in the absence of renal failure, whilst βm-V27M is associated with renal failure, with amyloid deposits forming predominantly in the tongue. Here we use cryoEM to determine the structures of fibrils formed from these variants under identical conditions in vitro. We show that each fibril sample is polymorphic, with diversity arising from a 'lego-like' assembly of a common amyloid building block. These results suggest a 'many sequences, one amyloid fold' paradigm in contrast with the recently reported 'one sequence, many amyloid folds' behaviour of intrinsically disordered proteins such as tau and Aβ. | ||||||||||||
履歴 |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 8a7t.cif.gz | 92.3 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb8a7t.ent.gz | 70.1 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 8a7t.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
文書・要旨 | 8a7t_validation.pdf.gz | 1.3 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 8a7t_full_validation.pdf.gz | 1.3 MB | 表示 | |
XML形式データ | 8a7t_validation.xml.gz | 28.1 KB | 表示 | |
CIF形式データ | 8a7t_validation.cif.gz | 38.8 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/a7/8a7t ftp://data.pdbj.org/pub/pdb/validation_reports/a7/8a7t | HTTPS FTP |
-関連構造データ
-リンク
-集合体
登録構造単位 |
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-要素
#1: タンパク質 | 分子量: 11747.176 Da / 分子数: 6 / 変異: D76N / 由来タイプ: 組換発現 / 詳細: Natural variant D76N / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: B2M, CDABP0092, HDCMA22P / Variant: D76N / プラスミド: pINK / 発現宿主: Escherichia coli BL21 (大腸菌) / 参照: UniProt: P61769 |
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-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: FILAMENT / 3次元再構成法: らせん対称体再構成法 |
-試料調製
構成要素 | 名称: Amyloid fibril polymorph 2PFa of the beta-2-microglobulin D76N variant. タイプ: COMPLEX 詳細: Recombinantly expressed and fibrillated in vitro at pH 6.2 Entity ID: all / 由来: RECOMBINANT | |||||||||||||||
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分子量 | 実験値: NO | |||||||||||||||
由来(天然) | 生物種: Homo sapiens (ヒト) | |||||||||||||||
由来(組換発現) | 生物種: Escherichia coli (大腸菌) / 株: BL21 / プラスミド: pINK | |||||||||||||||
緩衝液 | pH: 6.2 | |||||||||||||||
緩衝液成分 |
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試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES 詳細: Fibrillation conditions: 20 uM monomeric b2m-DN6 at 37C with shaking at 600 rpm for 2-3 weeks | |||||||||||||||
試料支持 | 詳細: The grid was plasma cleaned prior to 2x application of graphene oxide-DDM mixture, then grid was used immediately for sample application and vitrification グリッドの材料: COPPER / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: EMS Lacey Carbon | |||||||||||||||
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 90 % / 凍結前の試料温度: 277 K / 詳細: 6s blot |
-電子顕微鏡撮影
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TITAN KRIOS |
電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 96000 X / 最大 デフォーカス(公称値): 3000 nm / 最小 デフォーカス(公称値): 800 nm / Cs: 2.7 mm / C2レンズ絞り径: 50 µm / アライメント法: COMA FREE |
試料ホルダ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 平均露光時間: 6.2 sec. / 電子線照射量: 43 e/Å2 フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) 撮影したグリッド数: 1 / 実像数: 3849 詳細: 1477 raw EER frames were collected per image and combined into 54 fractions for processing |
-解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||
らせん対称 | 回転角度/サブユニット: -0.99 ° / 軸方向距離/サブユニット: 4.8 Å / らせん対称軸の対称性: C1 | ||||||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 1117062 詳細: Manually picked a subset of images to train a model for automatic fibril segment picking in crYOLO | ||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 78097 / 対称性のタイプ: HELICAL | ||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | B value: 86 / プロトコル: AB INITIO MODEL / 空間: REAL | ||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 8A7O Accession code: 8A7O / Source name: PDB / タイプ: experimental model |