+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-24778 | |||||||||
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タイトル | Cryo-EM structure of the SARS-CoV-2 HR1HR2 fusion core complex with A942S mutation | |||||||||
マップデータ | ||||||||||
試料 |
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キーワード | spike / HR1HR2 / fusion / A942S / VIRAL PROTEIN | |||||||||
機能・相同性 | 機能・相同性情報 oxidoreductase activity, acting on metal ions / ferric iron binding / Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / suppression by virus of host tetherin activity / Induction of Cell-Cell Fusion ...oxidoreductase activity, acting on metal ions / ferric iron binding / Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / suppression by virus of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / receptor-mediated endocytosis of virus by host cell / membrane fusion / Attachment and Entry / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / receptor ligand activity / host cell surface receptor binding / symbiont-mediated suppression of host innate immune response / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / virion attachment to host cell / SARS-CoV-2 activates/modulates innate and adaptive immune responses / host cell plasma membrane / virion membrane / identical protein binding / membrane / plasma membrane 類似検索 - 分子機能 | |||||||||
生物種 | Severe acute respiratory syndrome coronavirus 2 (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: 2.3 Å | |||||||||
データ登録者 | Yang K / Brunger AT | |||||||||
資金援助 | 米国, 1件
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引用 | ジャーナル: Proc Natl Acad Sci U S A / 年: 2022 タイトル: Structural conservation among variants of the SARS-CoV-2 spike postfusion bundle. 著者: Kailu Yang / Chuchu Wang / K Ian White / Richard A Pfuetzner / Luis Esquivies / Axel T Brunger / 要旨: Variants of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) challenge currently available COVID-19 vaccines and monoclonal antibody therapies due to structural and dynamic changes of the ...Variants of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) challenge currently available COVID-19 vaccines and monoclonal antibody therapies due to structural and dynamic changes of the viral spike glycoprotein (S). The heptad repeat 1 (HR1) and heptad repeat 2 (HR2) domains of S drive virus–host membrane fusion by assembly into a six-helix bundle, resulting in delivery of viral RNA into the host cell. We surveyed mutations of currently reported SARS-CoV-2 variants and selected eight mutations, including Q954H, N969K, and L981F from the Omicron variant, in the postfusion HR1HR2 bundle for functional and structural studies. We designed a molecular scaffold to determine cryogenic electron microscopy (cryo-EM) structures of HR1HR2 at 2.2–3.8 Å resolution by linking the trimeric N termini of four HR1 fragments to four trimeric C termini of the Dps4 dodecamer from Nostoc punctiforme. This molecular scaffold enables efficient sample preparation and structure determination of the HR1HR2 bundle and its mutants by single-particle cryo-EM. Our structure of the wild-type HR1HR2 bundle resolves uncertainties in previously determined structures. The mutant structures reveal side-chain positions of the mutations and their primarily local effects on the interactions between HR1 and HR2. These mutations do not alter the global architecture of the postfusion HR1HR2 bundle, suggesting that the interfaces between HR1 and HR2 are good targets for developing antiviral inhibitors that should be efficacious against all known variants of SARS-CoV-2 to date. We also note that this work paves the way for similar studies in more distantly related viruses. | |||||||||
履歴 |
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-構造の表示
添付画像 |
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-ダウンロードとリンク
-EMDBアーカイブ
マップデータ | emd_24778.map.gz | 5.6 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-24778-v30.xml emd-24778.xml | 10.6 KB 10.6 KB | 表示 表示 | EMDBヘッダ |
画像 | emd_24778.png | 63.2 KB | ||
Filedesc metadata | emd-24778.cif.gz | 5.1 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-24778 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-24778 | 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_24778.map.gz / 形式: CCP4 / 大きさ: 64 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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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: 0.81625 Å | ||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
-試料の構成要素
-全体 : SARS-CoV-2 HR1HR2 complex with A942S mutation
全体 | 名称: SARS-CoV-2 HR1HR2 complex with A942S mutation |
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要素 |
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-超分子 #1: SARS-CoV-2 HR1HR2 complex with A942S mutation
超分子 | 名称: SARS-CoV-2 HR1HR2 complex with A942S mutation / タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all |
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由来(天然) | 生物種: Severe acute respiratory syndrome coronavirus 2 (ウイルス) |
分子量 | 理論値: 40 KDa |
-分子 #1: SARS-CoV-2 HR1 A942S linked to a scaffold,Spike protein S2'
分子 | 名称: SARS-CoV-2 HR1 A942S linked to a scaffold,Spike protein S2' タイプ: protein_or_peptide / ID: 1 / コピー数: 3 / 光学異性体: LEVO |
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由来(天然) | 生物種: Severe acute respiratory syndrome coronavirus 2 (ウイルス) |
分子量 | 理論値: 28.775055 KDa |
組換発現 | 生物種: Escherichia coli (大腸菌) |
配列 | 文字列: MSHHHHHHGS QTLLRNFGNV YDNPVLLDRS VTAPVTEGFN VVLASFQALY LQYQKHHFVV EGSEFYSLHE FFNESYNQVQ DHIHEIGER LDGLGGVPVA TFSKLAELTC FEQESEGVYS SRQMVENDLA AEQAIIGVIR RQAAQAESLG DRGTRYLYEK I LLKTEERA ...文字列: MSHHHHHHGS QTLLRNFGNV YDNPVLLDRS VTAPVTEGFN VVLASFQALY LQYQKHHFVV EGSEFYSLHE FFNESYNQVQ DHIHEIGER LDGLGGVPVA TFSKLAELTC FEQESEGVYS SRQMVENDLA AEQAIIGVIR RQAAQAESLG DRGTRYLYEK I LLKTEERA YHLSHFLAKD SLTLGFAYEN QKLIANQFNS AIGKIQDSLS STSSALGKLQ DVVNQNAQAL NTLVKQLSSN FG AISSVLN DILSRLDKVE UniProtKB: Ferritin, Dps family protein, Spike glycoprotein |
-分子 #2: Spike protein S2'
分子 | 名称: Spike protein S2' / タイプ: protein_or_peptide / ID: 2 / コピー数: 3 / 光学異性体: LEVO |
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由来(天然) | 生物種: Severe acute respiratory syndrome coronavirus 2 (ウイルス) |
分子量 | 理論値: 4.422881 KDa |
組換発現 | 生物種: Escherichia coli (大腸菌) |
配列 | 文字列: GPDVDLGDIS GINASVVNIQ KEIDRLNEVA KNLNESLIDL Q UniProtKB: Spike glycoprotein |
-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
緩衝液 | pH: 7.4 |
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凍結 | 凍結剤: ETHANE |
-電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 平均電子線量: 49.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD |
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |
-画像解析
初期モデル | モデルのタイプ: NONE |
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最終 再構成 | 解像度のタイプ: BY AUTHOR / 解像度: 2.3 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 使用した粒子像数: 562936 |
初期 角度割当 | タイプ: MAXIMUM LIKELIHOOD |
最終 角度割当 | タイプ: MAXIMUM LIKELIHOOD |