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データを開く
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基本情報
| 登録情報 | データベース: PDB / ID: 9k6z | ||||||||||||||||||||||||||||||
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| タイトル | SARS-CoV-2 related bat coronavirus BANAL-52 spike in the locked state | ||||||||||||||||||||||||||||||
要素 | Spike glycoprotein | ||||||||||||||||||||||||||||||
キーワード | VIRAL PROTEIN / SARS-CoV-2 related bat coronavirus BANA-52 spike with linoleic acid binding | ||||||||||||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報positive regulation of viral entry into host cell / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / receptor-mediated virion attachment to host cell / host cell surface receptor binding / endocytosis involved in viral entry into host cell / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / host cell plasma membrane / virion membrane ...positive regulation of viral entry into host cell / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / receptor-mediated virion attachment to host cell / host cell surface receptor binding / endocytosis involved in viral entry into host cell / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / host cell plasma membrane / virion membrane / membrane / identical protein binding 類似検索 - 分子機能 | ||||||||||||||||||||||||||||||
| 生物種 | Horseshoe bat sarbecovirus (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: 3.51 Å | ||||||||||||||||||||||||||||||
データ登録者 | Li, Q.Q. / Cai, X. / Li, X.N. / Zhang, Y.B. / Li, R. / Kang, Z.R. / Wan, D.D. / Wang, J.X. / Yang, J.X. / Shi, J.X. ...Li, Q.Q. / Cai, X. / Li, X.N. / Zhang, Y.B. / Li, R. / Kang, Z.R. / Wan, D.D. / Wang, J.X. / Yang, J.X. / Shi, J.X. / Jin, S.L. / Peng, Y. / Zang, N. / Xie, Z.K. / Wan, Y.S. / Shang, J. | ||||||||||||||||||||||||||||||
| 資金援助 | 中国, 3件
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引用 | ジャーナル: J Virol / 年: 2025タイトル: Structural and functional constraints on spike activation and host protease utilization limit cell entry of SARS-CoV-2-related bat coronaviruses. 著者: Qingqing Li / Xiao Cai / Xiaoning Li / Yibing Zhang / Ru Li / Zirui Kang / Didi Wan / Jiaxu Wang / Lili Li / Junxia Yang / Jianxiang Shi / Shuiling Jin / Xiangdong Sun / Ying Peng / Na Zang / ...著者: Qingqing Li / Xiao Cai / Xiaoning Li / Yibing Zhang / Ru Li / Zirui Kang / Didi Wan / Jiaxu Wang / Lili Li / Junxia Yang / Jianxiang Shi / Shuiling Jin / Xiangdong Sun / Ying Peng / Na Zang / Zhengkun Xie / Yushun Wan / Jian Shang / ![]() 要旨: The persistent threat posed by SARS-CoV-2-related coronaviruses (SC2r-CoVs) in wildlife highlights the risk of zoonotic transmission. Cross-species infectivity is predominantly determined by spike (S) ...The persistent threat posed by SARS-CoV-2-related coronaviruses (SC2r-CoVs) in wildlife highlights the risk of zoonotic transmission. Cross-species infectivity is predominantly determined by spike (S) character and S-mediated cell entry. In this study, we systematically investigated BANAL-52 and BANAL-103, which exhibit the closest genetic proximity to SARS-CoV-2, focusing on their spike structures and functional characteristics. First, despite comparable receptor-binding domain (RBD)-ACE2 interactions, the spikes of BANAL-52 and BANAL-103 displayed significantly reduced ACE2 binding compared to SARS-CoV-2, suggesting impaired S activation. Second, Cryo-EM structural analyses revealed that BANAL-52 S is stabilized in a "locked" state through linoleic acid (LA) binding and an additional N370 glycan, whereas BANAL-103 S adopts a "closed" conformation due to a unique glycan network. Site-directed mutagenesis targeting the LA binding pocket confirmed that Y365 is related to S conformational transitions and viral entry. Third, both BANAL spikes relied predominantly on lysosomal proteases (e.g., cathepsins) for membrane fusion, unlike SARS-CoV-2, which utilizes a broader range of proteases (e.g., TMPRSS2 and furin). The introduction of a furin cleavage site enhanced the fusogenicity of BANAL spikes. Finally, sera from individuals who have recovered from SARS-CoV-2 effectively neutralized BANAL pseudoviruses, underscoring conserved antigenicity. Our findings elucidate structural and proteolytic barriers that restrict the zoonotic potential of these viruses and propose targeted surveillance strategies to preempt the emergence of SC2r-CoVs. IMPORTANCE: The viral entry mechanisms, which are primarily related to the spike character, play a critical role in determining zoonotic potential. Among the currently identified SC2r-CoVs, BANAL-52 ...IMPORTANCE: The viral entry mechanisms, which are primarily related to the spike character, play a critical role in determining zoonotic potential. Among the currently identified SC2r-CoVs, BANAL-52 and BANAL-103 exhibit spike proteins with the highest sequence similarity to SARS-CoV-2, rendering them optimal models for comparative studies on S-mediated cell entry and cross-species transmission. In this study, we systematically investigated the molecular constraints governing the functionality of BANAL spikes, with a focus on S-ACE2 interactions, S activation, S structures, and host protease utilization. Notably, we resolved the cryo-EM structure of BANAL-52 S at neutral pH and the first cryo-EM structure of BANAL-103 S, revealing distinct glycan- and lipid-mediated stabilization of inactive states. Furthermore, cross-neutralization assays demonstrated that sera of convalescents from SARS-CoV-2 inhibited BANAL pseudovirus entry with an efficiency of approximately 80%, thereby highlighting conserved antigenic epitopes and informing the development of broad-spectrum therapeutic strategies against emerging SC2r-CoVs. | ||||||||||||||||||||||||||||||
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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ダウンロードとリンク
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ダウンロード
| PDBx/mmCIF形式 | 9k6z.cif.gz | 706.5 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9k6z.ent.gz | 484.7 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9k6z.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/k6/9k6z ftp://data.pdbj.org/pub/pdb/validation_reports/k6/9k6z | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 62143MC ![]() 9k75C M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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| 類似構造データ | 類似検索 - 機能・相同性 F&H 検索 |
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リンク
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集合体
| 登録構造単位 | ![]()
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要素
| #1: タンパク質 | 分子量: 138414.312 Da / 分子数: 3 / 由来タイプ: 組換発現 由来: (組換発現) Horseshoe bat sarbecovirus (ウイルス)遺伝子: S / 発現宿主: Mammalia (両生類) / 参照: UniProt: A0AA49X976 #2: 糖 | ChemComp-NAG / #3: 化合物 | 研究の焦点であるリガンドがあるか | Y | 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 |
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試料調製
| 構成要素 | 名称: SARS-CoV-2 related bat coronavirus BANAL-52 spike protein タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
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| 分子量 | 値: 450 kDa/nm / 実験値: NO |
| 由来(天然) | 生物種: Horseshoe bat sarbecovirus (ウイルス) |
| 由来(組換発現) | 生物種: Mammalia (両生類) |
| ウイルスについての詳細 | タイプ: VIRUS-LIKE PARTICLE |
| 緩衝液 | pH: 7.4 |
| 試料 | 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 |
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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: TFS 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 / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 500 nm |
| 撮影 | 電子線照射量: 50 e/Å2 フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) |
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解析
| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
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| 3次元再構成 | 解像度: 3.51 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 20175 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
| 精密化 | 交差検証法: NONE 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
| 原子変位パラメータ | Biso mean: 54.98 Å2 | ||||||||||||||||||||||||
| 拘束条件 |
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ムービー
コントローラー
万見について




Horseshoe bat sarbecovirus (ウイルス)
中国, 3件
引用


PDBj



FIELD EMISSION GUN