+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-11524 | |||||||||
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タイトル | Fully-loaded anthrax lethal toxin in its heptameric pre-pore state and PA7LF(2+1A) arrangement | |||||||||
マップデータ | PA7LF(2 1A) | |||||||||
試料 |
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キーワード | anthrax lethal toxin / fully-loaded pre-pore state / membrane translocase / cytotoxic substrate / TOXIN | |||||||||
機能・相同性 | 機能・相同性情報 anthrax lethal factor endopeptidase / positive regulation of apoptotic process in another organism / host cell cytosol / Uptake and function of anthrax toxins / negative regulation of MAPK cascade / host cell endosome membrane / protein homooligomerization / metalloendopeptidase activity / metallopeptidase activity / toxin activity ...anthrax lethal factor endopeptidase / positive regulation of apoptotic process in another organism / host cell cytosol / Uptake and function of anthrax toxins / negative regulation of MAPK cascade / host cell endosome membrane / protein homooligomerization / metalloendopeptidase activity / metallopeptidase activity / toxin activity / host cell plasma membrane / proteolysis / zinc ion binding / extracellular region / identical protein binding / membrane / metal ion binding 類似検索 - 分子機能 | |||||||||
生物種 | Bacillus anthracis (炭疽菌) | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 4.2 Å | |||||||||
データ登録者 | Quentin D / Antoni C | |||||||||
資金援助 | ドイツ, 1件
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引用 | ジャーナル: PLoS Pathog / 年: 2020 タイトル: Cryo-EM structure of the fully-loaded asymmetric anthrax lethal toxin in its heptameric pre-pore state. 著者: Claudia Antoni / Dennis Quentin / Alexander E Lang / Klaus Aktories / Christos Gatsogiannis / Stefan Raunser / 要旨: Anthrax toxin is the major virulence factor secreted by Bacillus anthracis, causing high mortality in humans and other mammals. It consists of a membrane translocase, known as protective antigen (PA) ...Anthrax toxin is the major virulence factor secreted by Bacillus anthracis, causing high mortality in humans and other mammals. It consists of a membrane translocase, known as protective antigen (PA), that catalyzes the unfolding of its cytotoxic substrates lethal factor (LF) and edema factor (EF), followed by translocation into the host cell. Substrate recruitment to the heptameric PA pre-pore and subsequent translocation, however, are not well understood. Here, we report three high-resolution cryo-EM structures of the fully-loaded anthrax lethal toxin in its heptameric pre-pore state, which differ in the position and conformation of LFs. The structures reveal that three LFs interact with the heptameric PA and upon binding change their conformation to form a continuous chain of head-to-tail interactions. As a result of the underlying symmetry mismatch, one LF binding site in PA remains unoccupied. Whereas one LF directly interacts with a part of PA called α-clamp, the others do not interact with this region, indicating an intermediate state between toxin assembly and translocation. Interestingly, the interaction of the N-terminal domain with the α-clamp correlates with a higher flexibility in the C-terminal domain of the protein. Based on our data, we propose a model for toxin assembly, in which the relative position of the N-terminal α-helices in the three LFs determines which factor is translocated first. | |||||||||
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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構造ビューア | EMマップ: SurfViewMolmilJmol/JSmol |
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_11524.map.gz | 137.7 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-11524-v30.xml emd-11524.xml | 18.5 KB 18.5 KB | 表示 表示 | EMDBヘッダ |
画像 | emd_11524.png | 161.9 KB | ||
Filedesc metadata | emd-11524.cif.gz | 7.5 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-11524 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-11524 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_11524_validation.pdf.gz | 377.3 KB | 表示 | EMDB検証レポート |
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文書・詳細版 | emd_11524_full_validation.pdf.gz | 376.9 KB | 表示 | |
XML形式データ | emd_11524_validation.xml.gz | 6.9 KB | 表示 | |
CIF形式データ | emd_11524_validation.cif.gz | 7.9 KB | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-11524 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-11524 | 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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「今月の分子」の関連する項目 |
-マップ
ファイル | ダウンロード / ファイル: emd_11524.map.gz / 形式: CCP4 / 大きさ: 144.7 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | PA7LF(2 1A) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 1.07 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 : Fully-loaded anthrax lethal toxin in its heptameric pre-pore stat...
全体 | 名称: Fully-loaded anthrax lethal toxin in its heptameric pre-pore state and PA7LF(2+1A) arrangement |
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要素 |
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-超分子 #1: Fully-loaded anthrax lethal toxin in its heptameric pre-pore stat...
超分子 | 名称: Fully-loaded anthrax lethal toxin in its heptameric pre-pore state and PA7LF(2+1A) arrangement タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all 詳細: Heptameric pre-pores of proteolytically-acitivated protective antigen were loaded with excess of LFs to create the PA7LF3 complexes. The LFs form a continuous chain of head-to-tail ...詳細: Heptameric pre-pores of proteolytically-acitivated protective antigen were loaded with excess of LFs to create the PA7LF3 complexes. The LFs form a continuous chain of head-to-tail interactions. In the PA7LF(2+1A) arrangement, the third LF binds with its N-terminal domain to the C-terminal region of the 2nd LF. |
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分子量 | 理論値: 93 KDa |
-超分子 #2: Protective antigen
超分子 | 名称: Protective antigen / タイプ: complex / ID: 2 / 親要素: 1 / 含まれる分子: #1 詳細: The trypsin-activated 63 kDa fragments assemble into a hepatameric pre-pore |
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由来(天然) | 生物種: Bacillus anthracis (炭疽菌) |
-超分子 #3: Lethal factor
超分子 | 名称: Lethal factor / タイプ: complex / ID: 3 / 親要素: 1 / 含まれる分子: #2 詳細: Three LF molecules crown the heptameric PA ring. The LFs form a continuous chain of head-to-tail interactions. In the PA7LF(2+1A) arrangement, the third LF binds with its N-terminal domain to ...詳細: Three LF molecules crown the heptameric PA ring. The LFs form a continuous chain of head-to-tail interactions. In the PA7LF(2+1A) arrangement, the third LF binds with its N-terminal domain to the C-terminus of the 2nd LF. |
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由来(天然) | 生物種: Bacillus anthracis (炭疽菌) |
-分子 #1: Protective antigen
分子 | 名称: Protective antigen / タイプ: protein_or_peptide / ID: 1 / コピー数: 7 / 光学異性体: LEVO |
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由来(天然) | 生物種: Bacillus anthracis (炭疽菌) |
分子量 | 理論値: 85.67993 KDa |
組換発現 | 生物種: Escherichia coli BL21(DE3) (大腸菌) |
配列 | 文字列: MGHHHHHHHH HHSSGHIDDD DKHMEVKQEN RLLNESESSS QGLLGYYFSD LNFQAPMVVT SSTTGDLSIP SSELENIPSE NQYFQSAIW SGFIKVKKSD EYTFATSADN HVTMWVDDQE VINKASNSNK IRLEKGRLYQ IKIQYQRENP TEKGLDFKLY W TDSQNKKE ...文字列: MGHHHHHHHH HHSSGHIDDD DKHMEVKQEN RLLNESESSS QGLLGYYFSD LNFQAPMVVT SSTTGDLSIP SSELENIPSE NQYFQSAIW SGFIKVKKSD EYTFATSADN HVTMWVDDQE VINKASNSNK IRLEKGRLYQ IKIQYQRENP TEKGLDFKLY W TDSQNKKE VISSDNLQLP ELKQKSSNSR KKRSTSAGPT VPDRDNDGIP DSLEVEGYTV DVKNKRTFLS PWISNIHEKK GL TKYKSSP EKWSTASDPY SDFEKVTGRI DKNVSPEARH PLVAAYPIVH VDMENIILSK NEDQSTQNTD SQTRTISKNT STS RTHTSE VHGNAEVHAS FFDIGGSVSA GFSNSNSSTV AIDHSLSLAG ERTWAETMGL NTADTARLNA NIRYVNTGTA PIYN VLPTT SLVLGKNQTL ATIKAKENQL SQILAPNNYY PSKNLAPIAL NAQDDFSSTP ITMNYNQFLE LEKTKQLRLD TDQVY GNIA TYNFENGRVR VDTGSNWSEV LPQIQETTAR IIFNGKDLNL VERRIAAVNP SDPLETTKPD MTLKEALKIA FGFNEP NGN LQYQGKDITE FDFNFDQQTS QNIKNQLAEL NATNIYTVLD KIKLNAKMNI LIRDKRFHYD RNNIAVGADE SVVKEAH RE VINSSTEGLL LNIDKDIRKI LSGYIVEIED TEGLKEVIND RYDMLNISSL RQDGKTFIDF KKYNDKLPLY ISNPNYKV N VYAVTKENTI INPSENGDTS TNGIKKILIF SKKGYEIG UniProtKB: Protective antigen |
-分子 #2: Lethal factor
分子 | 名称: Lethal factor / タイプ: protein_or_peptide / ID: 2 / コピー数: 3 / 光学異性体: LEVO / EC番号: anthrax lethal factor endopeptidase |
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由来(天然) | 生物種: Bacillus anthracis (炭疽菌) |
分子量 | 理論値: 93.904211 KDa |
組換発現 | 生物種: Bacillus anthracis (炭疽菌) |
配列 | 文字列: MNIKKEFIKV ISMSCLVTAI TLSGPVFIPL VQGAGGHGDV GMHVKEKEKN KDENKRKDEE RNKTQEEHLK EIMKHIVKIE VKGEEAVKK EAAEKLLEKV PSDVLEMYKA IGGKIYIVDG DITKHISLEA LSEDKKKIKD IYGKDALLHE HYVYAKEGYE P VLVIQSSE ...文字列: MNIKKEFIKV ISMSCLVTAI TLSGPVFIPL VQGAGGHGDV GMHVKEKEKN KDENKRKDEE RNKTQEEHLK EIMKHIVKIE VKGEEAVKK EAAEKLLEKV PSDVLEMYKA IGGKIYIVDG DITKHISLEA LSEDKKKIKD IYGKDALLHE HYVYAKEGYE P VLVIQSSE DYVENTEKAL NVYYEIGKIL SRDILSKINQ PYQKFLDVLN TIKNASDSDG QDLLFTNQLK EHPTDFSVEF LE QNSNEVQ EVFAKAFAYY IEPQHRDVLQ LYAPEAFNYM DKFNEQEINL SLEELKDQRM LARYEKWEKI KQHYQHWSDS LSE EGRGLL KKLQIPIEPK KDDIIHSLSQ EEKELLKRIQ IDSSDFLSTE EKEFLKKLQI DIRDSLSEEE KELLNRIQVD SSNP LSEKE KEFLKKLKLD IQPYDINQRL QDTGGLIDSP SINLDVRKQY KRDIQNIDAL LHQSIGSTLY NKIYLYENMN INNLT ATLG ADLVDSTDNT KINRGIFNEF KKNFKYSISS NYMIVDINER PALDNERLKW RIQLSPDTRA GYLENGKLIL QRNIGL EIK DVQIIKQSEK EYIRIDAKVV PKSKIDTKIQ EAQLNINQEW NKALGLPKYT KLITFNVHNR YASNIVESAY LILNEWK NN IQSDLIKKVT NYLVDGNGRF VFTDITLPNI AEQYTHQDEI YEQVHSKGLY VPESRSILLH GPSKGVELRN DSEGFIHE F GHAVDDYAGY LLDKNQSDLV TNSKKFIDIF KEEGSNLTSY GRTNEAEFFA EAFRLMHSTD HAERLKVQKN APKTFQFIN DQIKFIINS UniProtKB: Lethal factor |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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解析 | 単粒子再構成法 |
試料の集合状態 | particle |
-試料調製
濃度 | 0.06 mg/mL | |||||||||
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緩衝液 | pH: 8.5 構成要素:
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グリッド | モデル: Quantifoil R1.2/1.3 / 材質: COPPER / メッシュ: 300 / 支持フィルム - 材質: CARBON / 支持フィルム - トポロジー: CONTINUOUS / 支持フィルム - Film thickness: 2 / 前処理 - タイプ: GLOW DISCHARGE / 前処理 - 時間: 40 sec. / 前処理 - 雰囲気: AIR | |||||||||
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 95 % / チャンバー内温度: 286 K / 装置: GATAN CRYOPLUNGE 3 詳細: 4 uL sample was applied to grid (with 2 nm additional carbon layer) and incubated for 45 s prior blotting.. |
-電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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特殊光学系 | エネルギーフィルター - 名称: GIF Bioquantum / エネルギーフィルター - スリット幅: 20 eV |
撮影 | フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 検出モード: COUNTING / 実像数: 5238 / 平均露光時間: 15.0 sec. / 平均電子線量: 74.4 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN |
電子光学系 | 最大 デフォーカス(補正後): 2.6 µm / 最小 デフォーカス(補正後): 1.2 µm / 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.7 mm / 倍率(公称値): 130000 |
試料ステージ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER ホルダー冷却材: NITROGEN |
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |
+画像解析
-原子モデル構築 1
初期モデル | PDB ID: Chain - Source name: PDB / Chain - Initial model type: experimental model |
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詳細 | The previously generated PA7LF(2+1B) model (PDB:6ZXK) served as starting point and was placed into the density using rigid-body fit in Chimera. From this model, chain J was fitted into the density corresponding to the third LF, located adjacent to the second LF. For the entire model a restrained refinement in phenix was performed. The resulting model was further refined with a combination of phenix and coot. Unresolved regions were deleted and side chain information was removed for less well-resolved regions. |
得られたモデル | PDB-6zxl: |