+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-3360 | |||||||||
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タイトル | HSV bubblegram imaging | |||||||||
マップデータ | HSV 1st exposure | |||||||||
試料 |
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キーワード | HSV / Herpes Simplex Virus / Bubblegram / Radiation Damage / C-capsid | |||||||||
生物種 | Human herpesvirus 1 (ヘルペスウイルス) | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 25.0 Å | |||||||||
データ登録者 | Wu W / Newcomb WW / Cheng N / Aksyuk A / Winkler DC / Steven AC | |||||||||
引用 | ジャーナル: J Virol / 年: 2016 タイトル: Internal Proteins of the Procapsid and Mature Capsids of Herpes Simplex Virus 1 Mapped by Bubblegram Imaging. 著者: Weimin Wu / William W Newcomb / Naiqian Cheng / Anastasia Aksyuk / Dennis C Winkler / Alasdair C Steven / 要旨: The herpes simplex virus 1 (HSV-1) capsid is a huge assembly, ∼1,250 Å in diameter, and is composed of thousands of protein subunits with a combined mass of ∼200 MDa, housing a 100-MDa genome. ...The herpes simplex virus 1 (HSV-1) capsid is a huge assembly, ∼1,250 Å in diameter, and is composed of thousands of protein subunits with a combined mass of ∼200 MDa, housing a 100-MDa genome. First, a procapsid is formed through coassembly of the surface shell with an inner scaffolding shell; then the procapsid matures via a major structural transformation, triggered by limited proteolysis of the scaffolding proteins. Three mature capsids are found in the nuclei of infected cells. A capsids are empty, B capsids retain a shrunken scaffolding shell, and C capsids-which develop into infectious virions-are filled with DNA and ostensibly have expelled the scaffolding shell. The possible presence of other internal proteins in C capsids has been moot as, in cryo-electron microscopy (cryo-EM), they would be camouflaged by the surrounding DNA. We have used bubblegram imaging to map internal proteins in all four capsids, aided by the discovery that the scaffolding protein is exceptionally prone to radiation-induced bubbling. We confirmed that this protein forms thick-walled inner shells in the procapsid and the B capsid. C capsids generate two classes of bubbles: one occupies positions beneath the vertices of the icosahedral surface shell, and the other is distributed throughout its interior. A likely candidate is the viral protease. A subpopulation of C capsids bubbles particularly profusely and may represent particles in which expulsion of scaffold and DNA packaging are incomplete. Based on the procapsid structure, we propose that the axial channels of hexameric capsomers afford the pathway via which the scaffolding protein is expelled. IMPORTANCE: In addition to DNA, capsids of tailed bacteriophages and their distant relatives, herpesviruses, contain internal proteins. These proteins are often essential for infectivity but are ...IMPORTANCE: In addition to DNA, capsids of tailed bacteriophages and their distant relatives, herpesviruses, contain internal proteins. These proteins are often essential for infectivity but are difficult to locate within the virion. A novel adaptation of cryo-EM based on detecting gas bubbles generated by radiation damage was used to localize internal proteins of HSV-1, yielding insights into how capsid maturation is regulated. The scaffolding protein, which forms inner shells in the procapsid and B capsid, is exceptionally bubbling-prone. In the mature DNA-filled C capsid, a previously undetected protein was found to underlie the icosahedral vertices: this is tentatively assigned as a storage form of the viral protease. We also observed a capsid species that appears to contain substantial amounts of scaffolding protein as well as DNA, suggesting that DNA packaging and expulsion of the scaffolding protein are coupled processes. | |||||||||
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_3360.map.gz | 48.9 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-3360-v30.xml emd-3360.xml | 7.6 KB 7.6 KB | 表示 表示 | EMDBヘッダ |
画像 | EMD-3360.png | 634.1 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-3360 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-3360 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_3360_validation.pdf.gz | 261.6 KB | 表示 | EMDB検証レポート |
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文書・詳細版 | emd_3360_full_validation.pdf.gz | 260.7 KB | 表示 | |
XML形式データ | emd_3360_validation.xml.gz | 6.9 KB | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-3360 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-3360 | 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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-マップ
ファイル | ダウンロード / ファイル: emd_3360.map.gz / 形式: CCP4 / 大きさ: 51.5 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | HSV 1st exposure | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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: 6.684 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 : Herpes Simplex Virus Type 1
全体 | 名称: Herpes Simplex Virus Type 1 (ヘルペスウイルス) |
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要素 |
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-超分子 #1000: Herpes Simplex Virus Type 1
超分子 | 名称: Herpes Simplex Virus Type 1 / タイプ: sample / ID: 1000 / Number unique components: 1 |
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-超分子 #1: Human herpesvirus 1
超分子 | 名称: Human herpesvirus 1 / タイプ: virus / ID: 1 / NCBI-ID: 10298 / 生物種: Human herpesvirus 1 / Sci species strain: HSV-1 / ウイルスタイプ: VIRION / ウイルス・単離状態: STRAIN / ウイルス・エンベロープ: No / ウイルス・中空状態: No |
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宿主 | 生物種: Homo sapiens (ヒト) / 別称: VERTEBRATES |
Host system | 生物種: Cricetulus griseus (モンゴルキヌゲネズミ) 組換株: 17MP / 組換細胞: BHK-21 |
-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
凍結 | 凍結剤: NITROGEN / 装置: LEICA EM GP |
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-電子顕微鏡法
顕微鏡 | FEI/PHILIPS CM200FEG |
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日付 | 2014年5月12日 |
撮影 | カテゴリ: FILM / フィルム・検出器のモデル: KODAK SO-163 FILM デジタル化 - スキャナー: NIKON SUPER COOLSCAN 9000 デジタル化 - サンプリング間隔: 6.35 µm / 実像数: 18 / 平均電子線量: 195 e/Å2 |
電子線 | 加速電圧: 120 kV / 電子線源: FIELD EMISSION GUN |
電子光学系 | 照射モード: SPOT SCAN / 撮影モード: DARK FIELD |
試料ステージ | 試料ホルダーモデル: GATAN LIQUID NITROGEN |
-画像解析
CTF補正 | 詳細: average of particles |
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最終 再構成 | 想定した対称性 - 点群: I (正20面体型対称) / アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 25.0 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: EMAN / 詳細: We are not aiming at resolution. / 使用した粒子像数: 235 |