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データを開く
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基本情報
登録情報 | データベース: PDB / ID: 7qsr | ||||||||||||||||||
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タイトル | CryoEM structure of the Ectodomain of Human PLA2R | ||||||||||||||||||
![]() | Secretory phospholipase A2 receptor | ||||||||||||||||||
![]() | MEMBRANE PROTEIN / Receptor / Ectodomain / Glycoprotein / Nephrology | ||||||||||||||||||
機能・相同性 | ![]() negative regulation of phospholipase A2 activity / negative regulation of arachidonate secretion / Acyl chain remodelling of PG / Acyl chain remodelling of PC / Acyl chain remodelling of PI / Acyl chain remodelling of PS / Acyl chain remodelling of PE / positive regulation of podocyte apoptotic process / Synthesis of PA / positive regulation of arachidonate secretion ...negative regulation of phospholipase A2 activity / negative regulation of arachidonate secretion / Acyl chain remodelling of PG / Acyl chain remodelling of PC / Acyl chain remodelling of PI / Acyl chain remodelling of PS / Acyl chain remodelling of PE / positive regulation of podocyte apoptotic process / Synthesis of PA / positive regulation of arachidonate secretion / oxidative stress-induced premature senescence / positive regulation of DNA damage response, signal transduction by p53 class mediator / replicative senescence / phospholipase binding / receptor-mediated endocytosis / reactive oxygen species metabolic process / positive regulation of cytokine production / signaling receptor activity / carbohydrate binding / receptor complex / cell surface / extracellular region / plasma membrane 類似検索 - 分子機能 | ||||||||||||||||||
生物種 | ![]() | ||||||||||||||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.4 Å | ||||||||||||||||||
![]() | Briggs, D.C. / Lockhart-Cairns, M.P. / Baldock, C. | ||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structure of PLA2R reveals presentation of the dominant membranous nephropathy epitope and an immunogenic patch. 著者: Maryline Fresquet / Michael P Lockhart-Cairns / Samuel J Rhoden / Thomas A Jowitt / David C Briggs / Clair Baldock / Paul E Brenchley / Rachel Lennon / ![]() 要旨: Membranous nephropathy is an autoimmune kidney disease caused by autoantibodies targeting antigens present on glomerular podocytes, instigating a cascade leading to glomerular injury. The most ...Membranous nephropathy is an autoimmune kidney disease caused by autoantibodies targeting antigens present on glomerular podocytes, instigating a cascade leading to glomerular injury. The most prevalent circulating autoantibodies in membranous nephropathy are against phospholipase A2 receptor (PLA2R), a cell surface receptor. The dominant epitope in PLA2R is located within the cysteine-rich domain, yet high-resolution structure-based mapping is lacking. In this study, we define the key nonredundant amino acids in the dominant epitope of PLA2R involved in autoantibody binding. We further describe two essential regions within the dominant epitope and spacer requirements for a synthetic peptide of the epitope for drug discovery. In addition, using cryo-electron microscopy, we have determined the high-resolution structure of PLA2R to 3.4 Å resolution, which shows that the dominant epitope and key residues within the cysteine-rich domain are accessible at the cell surface. In addition, the structure of PLA2R not only suggests a different orientation of domains but also implicates a unique immunogenic signature in PLA2R responsible for inducing autoantibody formation and recognition. | ||||||||||||||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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ダウンロード
PDBx/mmCIF形式 | ![]() | 519.4 KB | 表示 | ![]() |
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PDB形式 | ![]() | 表示 | ![]() | |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1.4 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.4 MB | 表示 | |
XML形式データ | ![]() | 47.1 KB | 表示 | |
CIF形式データ | ![]() | 69.2 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 14077MC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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類似構造データ | 類似検索 - 機能・相同性 ![]() |
電子顕微鏡画像生データ | ![]() Data size: 2.1 TB Data #1: Unaligned multi-frame images of PLA2R at pH 6.2 with a 30 degree tilt. [micrographs - multiframe] Data #2: Unaligned multi-frame images of PLA2R at pH 6.2 with 0 degree tilt (not used in publication) [micrographs - multiframe]) |
実験データセット #1 | データ参照: ![]() |
その他のデータベース |
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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質 | 分子量: 159288.297 Da / 分子数: 1 / 由来タイプ: 組換発現 詳細: Extracellular domain of Human PLA2R with C-terminal His tag. 由来: (組換発現) ![]() ![]() | ||||||||||
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#2: 多糖 | #3: 多糖 | alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1- ...alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | #4: 多糖 | alpha-D-mannopyranose-(1-6)-beta-D-mannopyranose-(1-3)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1- ...alpha-D-mannopyranose-(1-6)-beta-D-mannopyranose-(1-3)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranose | タイプ: oligosaccharide / 分子量: 748.682 Da / 分子数: 1 / 由来タイプ: 組換発現 #5: 糖 | ChemComp-NAG / 研究の焦点であるリガンドがあるか | N | Has protein modification | Y | |
-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: 2D ARRAY / 3次元再構成法: 単粒子再構成法 |
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試料調製
構成要素 | 名称: Human PLA2R Ectodomain / タイプ: ORGANELLE OR CELLULAR COMPONENT / Entity ID: #1 / 由来: RECOMBINANT | |||||||||||||||
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分子量 | 実験値: NO | |||||||||||||||
由来(天然) | 生物種: ![]() | |||||||||||||||
由来(組換発現) | 生物種: ![]() | |||||||||||||||
緩衝液 | pH: 6.2 / 詳細: PLA2R prepared in Bis-Tris pH 6.2 buffer | |||||||||||||||
試料 | 濃度: 0.3 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | |||||||||||||||
試料支持 |
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急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE |
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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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EM imaging | 加速電圧: 300 kV / 凍結剤: NITROGEN / 電子線源:
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撮影 |
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電子光学装置 |
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解析
ソフトウェア |
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EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 1700000 詳細: Particles were picked using a Gaussian blob (80-130 ang) from 100 images of the 0 deg data set were extracted in a 256 pixel box, binned 4x4 (64 pixel box), and subjected to 2D classification. ...詳細: Particles were picked using a Gaussian blob (80-130 ang) from 100 images of the 0 deg data set were extracted in a 256 pixel box, binned 4x4 (64 pixel box), and subjected to 2D classification. The best templates were used to template pick all images from both data sets. | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.4 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 221000 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
原子モデル構築 | プロトコル: RIGID BODY FIT / 空間: REAL / Target criteria: Correlation Coefficient | ||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 7JPT PDB chain-ID: A / Accession code: 7JPT / Pdb chain residue range: 30-1381 / Source name: PDB / タイプ: experimental model | ||||||||||||||||||||||||
精密化 | 交差検証法: NONE 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 186.04 Å2 | ||||||||||||||||||||||||
拘束条件 |
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