+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 4v3n | ||||||
---|---|---|---|---|---|---|---|
タイトル | Membrane bound pleurotolysin prepore (TMH2 strand lock) trapped with engineered disulphide cross-link | ||||||
要素 |
| ||||||
キーワード | TRANSPORT PROTEIN / MACPF/CDC SUPERFAMILY / PORE-FORMING PROTEINS | ||||||
機能・相同性 | 機能・相同性情報 | ||||||
生物種 | PLEUROTUS OSTREATUS (ヒラタケ) | ||||||
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: 14 Å | ||||||
Model type details | CA ATOMS ONLY, CHAIN A, B, C | ||||||
データ登録者 | Lukoyanova, N. / Kondos, S.C. / Farabella, I. / Law, R.H.P. / Reboul, C.F. / Caradoc-Davies, T.T. / Spicer, B.A. / Kleifeld, O. / Perugini, M. / Ekkel, S. ...Lukoyanova, N. / Kondos, S.C. / Farabella, I. / Law, R.H.P. / Reboul, C.F. / Caradoc-Davies, T.T. / Spicer, B.A. / Kleifeld, O. / Perugini, M. / Ekkel, S. / Hatfaludi, T. / Oliver, K. / Hotze, E.M. / Tweten, R.K. / Whisstock, J.C. / Topf, M. / Dunstone, M.A. / Saibil, H.R. | ||||||
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 |
|
-構造の表示
ムービー |
ムービービューア |
---|---|
構造ビューア | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 4v3n.cif.gz | 319.6 KB | 表示 | PDBx/mmCIF形式 |
---|---|---|---|---|
PDB形式 | pdb4v3n.ent.gz | 261.7 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 4v3n.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 | 4v3n_validation.pdf.gz | 640.9 KB | 表示 | wwPDB検証レポート |
---|---|---|---|---|
文書・詳細版 | 4v3n_full_validation.pdf.gz | 640.4 KB | 表示 | |
XML形式データ | 4v3n_validation.xml.gz | 11.6 KB | 表示 | |
CIF形式データ | 4v3n_validation.cif.gz | 126.8 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/v3/4v3n ftp://data.pdbj.org/pub/pdb/validation_reports/v3/4v3n | HTTPS FTP |
-関連構造データ
関連構造データ | 2796MC 2793C 2794C 2795C 4oebC 4oejC 4ov8C 4v2tC 4v3aC 4v3mC C: 同じ文献を引用 (文献) M: このデータのモデリングに利用したマップデータ |
---|---|
類似構造データ |
-リンク
-集合体
登録構造単位 |
|
---|---|
1 |
|
-要素
#1: タンパク質 | 分子量: 14852.545 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) PLEUROTUS OSTREATUS (ヒラタケ) / 発現宿主: ESCHERICHIA COLI (大腸菌) / 株 (発現宿主): BL21(DE3) / Variant (発現宿主): CODON PLUS PLYSS (NOVAGEN) / 参照: UniProt: Q8X1M9 #2: タンパク質 | | 分子量: 42910.660 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) PLEUROTUS OSTREATUS (ヒラタケ) / 発現宿主: ESCHERICHIA COLI (大腸菌) / 株 (発現宿主): BL21(DE3) / Variant (発現宿主): CODON PLUS PLYSS (NOVAGEN) / 参照: UniProt: Q5W9E8 |
---|
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
---|---|
EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
-試料調製
構成要素 | 名称: PLEUROTOLYSIN PREPORE ON LIPOSOMES (TMH2 STRAND LOCK) TRAPPED WITH ENGINEERED DISULPHIDE タイプ: COMPLEX |
---|---|
緩衝液 | 名称: 50 MM NACL, 20 MM HEPES / pH: 7.4 / 詳細: 50 MM NACL, 20 MM HEPES |
試料 | 濃度: 0.02 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | 詳細: HOLEY CARBON |
急速凍結 | 装置: FEI VITROBOT MARK III / 凍結剤: ETHANE 詳細: VITRIFICATION 1 -- CRYOGEN- ETHANE, HUMIDITY- 80,INSTRUMENT- FEI VITROBOT MARK III, METHOD- PLEUROTOLYSIN A WAS FIRST ADDED TO SPHINGOMYELIN-CHOLESTEROL LIPOSOMES AT A MOLAR RATIO OF 1 TO ...詳細: VITRIFICATION 1 -- CRYOGEN- ETHANE, HUMIDITY- 80,INSTRUMENT- FEI VITROBOT MARK III, METHOD- PLEUROTOLYSIN A WAS FIRST ADDED TO SPHINGOMYELIN-CHOLESTEROL LIPOSOMES AT A MOLAR RATIO OF 1 TO 2000 PROTEIN TO LIPID IN THE ABOVE BUFFER. AFTER 5 MIN INCUBATION AT ROOM TEMPERATURE,PLEUROTOLYSIN B WAS ADDED TO THE MIXTURE AT A MOLAR RATIO OF 1 TO 2 TO PLEUROTOLYSIN A. THE MIXTURE WAS INCUBATED AT 40 C OR ROOM TEMPERATURE FOR 30 MIN AFTER WHICH 3. 5 UL WERE PLACED ON NEGATIVELY GLOW DISCHARGED LACEY GRIDS AND VITRIFIED IN LIQUID ETHANE USING A VITROBOT. BLOTTING WAS CARRIED OUT AT 36 C AND 80 PERCENT HUMIDITY. |
-電子顕微鏡撮影
実験機器 | モデル: Tecnai Polara / 画像提供: FEI Company |
---|---|
顕微鏡 | モデル: FEI POLARA 300 / 日付: 2013年3月5日 |
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): 59000 X / 倍率(補正後): 76148 X / 最大 デフォーカス(公称値): 3400 nm / 最小 デフォーカス(公称値): 800 nm / Cs: 2.3 mm |
試料ホルダ | 温度: 94 K |
撮影 | 電子線照射量: 25 e/Å2 フィルム・検出器のモデル: GATAN ULTRASCAN 4000 (4k x 4k) |
画像スキャン | デジタル画像の数: 210 |
-解析
EMソフトウェア |
| |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CTF補正 | 詳細: ESTIMATED WITH CTFFIND3, THEN PHASES FLIPPED FOR EACH PARTICLE | |||||||||||||||||||||
対称性 | 点対称性: C13 (13回回転対称) | |||||||||||||||||||||
3次元再構成 | 手法: ANGULAR RECONSTITUTION AND PROJECTION MATCHING / 解像度: 14 Å / 粒子像の数: 1110 / ピクセルサイズ(公称値): 1.94 Å / ピクセルサイズ(実測値): 2 Å 詳細: SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-2796. (DEPOSITION ID: 12860). 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: Cross-correlation coefficient / 詳細: METHOD--RIGID BODY | |||||||||||||||||||||
原子モデル構築 | PDB-ID: 4OEB Accession code: 4OEB / Source name: PDB / タイプ: experimental model | |||||||||||||||||||||
精密化 | 最高解像度: 14 Å | |||||||||||||||||||||
精密化ステップ | サイクル: LAST / 最高解像度: 14 Å
|