+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7cn4 | ||||||
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タイトル | Cryo-EM structure of bat RaTG13 spike glycoprotein | ||||||
要素 | Spike glycoprotein | ||||||
キーワード | VIRAL PROTEIN / spike | ||||||
機能・相同性 | 機能・相同性情報 endocytosis involved in viral entry into host cell / 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 ...endocytosis involved in viral entry into host cell / 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 | Bat coronavirus RaTG13 (ウイルス) | ||||||
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: 2.93 Å | ||||||
データ登録者 | Wang, X. / Zhang, S. / Qiao, S. / Yu, J. / Zeng, J. / Tian, L. | ||||||
引用 | ジャーナル: Nat Commun / 年: 2021 タイトル: Bat and pangolin coronavirus spike glycoprotein structures provide insights into SARS-CoV-2 evolution. 著者: Shuyuan Zhang / Shuyuan Qiao / Jinfang Yu / Jianwei Zeng / Sisi Shan / Long Tian / Jun Lan / Linqi Zhang / Xinquan Wang / 要旨: In recognizing the host cellular receptor and mediating fusion of virus and cell membranes, the spike (S) glycoprotein of coronaviruses is the most critical viral protein for cross-species ...In recognizing the host cellular receptor and mediating fusion of virus and cell membranes, the spike (S) glycoprotein of coronaviruses is the most critical viral protein for cross-species transmission and infection. Here we determined the cryo-EM structures of the spikes from bat (RaTG13) and pangolin (PCoV_GX) coronaviruses, which are closely related to SARS-CoV-2. All three receptor-binding domains (RBDs) of these two spike trimers are in the "down" conformation, indicating they are more prone to adopt the receptor-binding inactive state. However, we found that the PCoV_GX, but not the RaTG13, spike is comparable to the SARS-CoV-2 spike in binding the human ACE2 receptor and supporting pseudovirus cell entry. We further identified critical residues in the RBD underlying different activities of the RaTG13 and PCoV_GX/SARS-CoV-2 spikes. These results collectively indicate that tight RBD-ACE2 binding and efficient RBD conformational sampling are required for the evolution of SARS-CoV-2 to gain highly efficient infection. | ||||||
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 | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 7cn4.cif.gz | 589.6 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb7cn4.ent.gz | 479.6 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7cn4.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
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/cn/7cn4 ftp://data.pdbj.org/pub/pdb/validation_reports/cn/7cn4 | HTTPS FTP |
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-関連構造データ
-リンク
-集合体
登録構造単位 |
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-要素
#1: タンパク質 | 分子量: 140512.719 Da / 分子数: 3 / 変異: K982P/V983P / 由来タイプ: 組換発現 由来: (組換発現) Bat coronavirus RaTG13 (ウイルス) 発現宿主: Trichoplusia ni (イラクサキンウワバ) / 参照: UniProt: A0A6B9WHD3, UniProt: P0DTC2*PLUS #2: 多糖 | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose #3: 糖 | ChemComp-NAG / 研究の焦点であるリガンドがあるか | N | Has protein modification | Y | |
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-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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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: RaTG13 glycoprotein / タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
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分子量 | 実験値: NO |
由来(天然) | 生物種: Bat coronavirus RaTG13 (ウイルス) |
由来(組換発現) | 生物種: Trichoplusia ni (イラクサキンウワバ) |
緩衝液 | pH: 7.2 |
試料 | 濃度: 0.3 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 凍結剤: ETHANE |
-電子顕微鏡撮影
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TITAN KRIOS |
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 |
撮影 | 電子線照射量: 50 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
-解析
CTF補正 | タイプ: NONE |
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3次元再構成 | 解像度: 2.93 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 99241 / 対称性のタイプ: POINT |