+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 4oeb | ||||||
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タイトル | Structure of membrane binding protein pleurotolysin A from Pleurotus ostreatus | ||||||
要素 | Pleurotolysin A | ||||||
キーワード | MEMBRANE BINDING PROTEIN / beta-sandwich fold / pleurotolysin B | ||||||
機能・相同性 | Mutm (Fpg) Protein; Chain: A, domain 2 - #50 / Hemolysin, aegerolysin type / Aegerolysin / Mutm (Fpg) Protein; Chain: A, domain 2 / hemolysis by symbiont of host erythrocytes / Sandwich / Mainly Beta / Pleurotolysin A 機能・相同性情報 | ||||||
生物種 | Pleurotus ostreatus (ヒラタケ) | ||||||
手法 | X線回折 / シンクロトロン / 単波長異常分散 / 解像度: 1.85 Å | ||||||
データ登録者 | Dunstone, M.A. / Caradoc-Davies, T.T. / Whisstock, J.C. / Law, R.H.P. | ||||||
引用 | ジャーナル: PLoS Biol / 年: 2015 タイトル: Conformational changes during pore formation by the perforin-related protein pleurotolysin. 著者: Natalya Lukoyanova / Stephanie C Kondos / Irene Farabella / Ruby H P Law / Cyril F Reboul / Tom T Caradoc-Davies / Bradley A Spicer / Oded Kleifeld / Daouda A K Traore / Susan M Ekkel / Ilia ...著者: Natalya Lukoyanova / Stephanie C Kondos / Irene Farabella / Ruby H P Law / Cyril F Reboul / Tom T Caradoc-Davies / Bradley A Spicer / Oded Kleifeld / Daouda A K Traore / Susan M Ekkel / Ilia Voskoboinik / Joseph A Trapani / Tamas Hatfaludi / Katherine Oliver / Eileen M Hotze / Rodney K Tweten / James C Whisstock / Maya Topf / Helen R Saibil / Michelle A Dunstone / 要旨: Membrane attack complex/perforin-like (MACPF) proteins comprise the largest superfamily of pore-forming proteins, playing crucial roles in immunity and pathogenesis. Soluble monomers assemble into ...Membrane attack complex/perforin-like (MACPF) proteins comprise the largest superfamily of pore-forming proteins, playing crucial roles in immunity and pathogenesis. Soluble monomers assemble into large transmembrane pores via conformational transitions that remain to be structurally and mechanistically characterised. Here we present an 11 Å resolution cryo-electron microscopy (cryo-EM) structure of the two-part, fungal toxin Pleurotolysin (Ply), together with crystal structures of both components (the lipid binding PlyA protein and the pore-forming MACPF component PlyB). These data reveal a 13-fold pore 80 Å in diameter and 100 Å in height, with each subunit comprised of a PlyB molecule atop a membrane bound dimer of PlyA. The resolution of the EM map, together with biophysical and computational experiments, allowed confident assignment of subdomains in a MACPF pore assembly. The major conformational changes in PlyB are a ∼70° opening of the bent and distorted central β-sheet of the MACPF domain, accompanied by extrusion and refolding of two α-helical regions into transmembrane β-hairpins (TMH1 and TMH2). We determined the structures of three different disulphide bond-trapped prepore intermediates. Analysis of these data by molecular modelling and flexible fitting allows us to generate a potential trajectory of β-sheet unbending. The results suggest that MACPF conformational change is triggered through disruption of the interface between a conserved helix-turn-helix motif and the top of TMH2. Following their release we propose that the transmembrane regions assemble into β-hairpins via top down zippering of backbone hydrogen bonds to form the membrane-inserted β-barrel. The intermediate structures of the MACPF domain during refolding into the β-barrel pore establish a structural paradigm for the transition from soluble monomer to pore, which may be conserved across the whole superfamily. The TMH2 region is critical for the release of both TMH clusters, suggesting why this region is targeted by endogenous inhibitors of MACPF function. | ||||||
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 | 4oeb.cif.gz | 225.2 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb4oeb.ent.gz | 191 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 4oeb.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 | 4oeb_validation.pdf.gz | 445.5 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 4oeb_full_validation.pdf.gz | 446.4 KB | 表示 | |
XML形式データ | 4oeb_validation.xml.gz | 25.8 KB | 表示 | |
CIF形式データ | 4oeb_validation.cif.gz | 37.7 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/oe/4oeb ftp://data.pdbj.org/pub/pdb/validation_reports/oe/4oeb | 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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単位格子 |
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-要素
#1: タンパク質 | 分子量: 15248.686 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) Pleurotus ostreatus (ヒラタケ) / 遺伝子: PlyA, plyA / 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: Q8X1M9 #2: 化合物 | ChemComp-SO4 / #3: 水 | ChemComp-HOH / | |
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-実験情報
-実験
実験 | 手法: X線回折 / 使用した結晶の数: 1 |
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-試料調製
結晶 | マシュー密度: 2.68 Å3/Da / 溶媒含有率: 54.05 % |
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結晶化 | 温度: 293 K / 手法: 蒸気拡散法, ハンギングドロップ法 / pH: 6 詳細: 20 mM sodium cacodylate, pH 6.0, 14% PEG3350, 0.2 M magnesium sulfate, VAPOR DIFFUSION, HANGING DROP, temperature 293K |
-データ収集
回折 | 平均測定温度: 100 K |
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放射光源 | 由来: シンクロトロン / サイト: Australian Synchrotron / ビームライン: MX1 / 波長: 0.95364 Å |
検出器 | タイプ: ADSC QUANTUM 210r / 検出器: CCD / 日付: 2008年4月16日 |
放射 | モノクロメーター: double crystal Si(111) / プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray |
放射波長 | 波長: 0.95364 Å / 相対比: 1 |
反射 | 解像度: 1.85→43.109 Å / Num. all: 54873 / Num. obs: 54873 / % possible obs: 100 % / Observed criterion σ(F): 2 / Observed criterion σ(I): 2 / 冗長度: 88.1 % / Biso Wilson estimate: 27.25 Å2 / Rmerge(I) obs: 0.113 / Net I/σ(I): 49.9 |
反射 シェル | 解像度: 1.85→2.11 Å / 冗長度: 87.5 % / Rmerge(I) obs: 0.561 / Mean I/σ(I) obs: 11.5 / Num. unique all: 6421 / % possible all: 100 |
-解析
ソフトウェア |
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精密化 | 構造決定の手法: 単波長異常分散 / 解像度: 1.85→43.109 Å / Cor.coef. Fo:Fc: 0.9396 / Cor.coef. Fo:Fc free: 0.9291 / SU R Cruickshank DPI: 0.115 / 交差検証法: THROUGHOUT / σ(F): 0 / SU R Blow DPI: 0.119 / SU Rfree Blow DPI: 0.109 / SU Rfree Cruickshank DPI: 0.107
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原子変位パラメータ | Biso mean: 35.26 Å2
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Refine analyze | Luzzati coordinate error obs: 0.259 Å | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
精密化ステップ | サイクル: LAST / 解像度: 1.85→43.109 Å
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拘束条件 |
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LS精密化 シェル | 解像度: 1.85→1.9 Å / Total num. of bins used: 20
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精密化 TLS | 手法: refined / Refine-ID: X-RAY DIFFRACTION
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精密化 TLSグループ |
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