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基本情報
登録情報 | データベース: PDB / ID: 9n8p | |||||||||
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タイトル | Subtomogram average of dimers of influenza HA trimers | |||||||||
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![]() | VIRAL PROTEIN / Hemagglutinin | |||||||||
機能・相同性 | ![]() Transport of HA trimer, NA tetramer and M2 tetramer from the endoplasmic reticulum to the Golgi Apparatus / Assembly of Viral Components at the Budding Site / Influenza Infection / Fusion of the Influenza Virion to the Host Cell Endosome / Release / Budding / Packaging of Eight RNA Segments / Uncoating of the Influenza Virion / Entry of Influenza Virion into Host Cell via Endocytosis / Viral mRNA Translation ...Transport of HA trimer, NA tetramer and M2 tetramer from the endoplasmic reticulum to the Golgi Apparatus / Assembly of Viral Components at the Budding Site / Influenza Infection / Fusion of the Influenza Virion to the Host Cell Endosome / Release / Budding / Packaging of Eight RNA Segments / Uncoating of the Influenza Virion / Entry of Influenza Virion into Host Cell via Endocytosis / Viral mRNA Translation / viral budding from plasma membrane / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / clathrin-dependent endocytosis of virus by host cell / host cell surface receptor binding / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / virion attachment to host cell / host cell plasma membrane / virion membrane / extracellular region / plasma membrane 類似検索 - 分子機能 | |||||||||
生物種 | ![]() ![]() | |||||||||
手法 | 電子顕微鏡法 / サブトモグラム平均法 / クライオ電子顕微鏡法 / 解像度: 9 Å | |||||||||
![]() | Huang, Q.J. / Song, K. / Schiffer, C.A. / Somasundaran, M. | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Virion-associated influenza hemagglutinin clusters upon sialic acid binding visualized by cryoelectron tomography. 著者: Qiuyu J Huang / Ryan Kim / Kangkang Song / Nikolaus Grigorieff / James B Munro / Celia A Schiffer / Mohan Somasundaran / ![]() 要旨: Influenza viruses are enveloped, negative-sense single-stranded RNA viruses covered in a dense layer of glycoproteins. Hemagglutinin (HA) accounts for 80 to 90% of influenza glycoprotein and plays a ...Influenza viruses are enveloped, negative-sense single-stranded RNA viruses covered in a dense layer of glycoproteins. Hemagglutinin (HA) accounts for 80 to 90% of influenza glycoprotein and plays a role in host cell binding and membrane fusion. While previous studies have characterized structures of purified receptor-free and receptor-bound HA, the effect of receptor binding on HA organization and structure on virions remains unknown. Here, we used cryoelectron tomography to visualize influenza virions bound to a sialic acid receptor mimic. Overall, receptor binding did not result in significant changes in viral morphology; however, we observed rearrangements of HA trimer organization and orientation. Compared to the even interglycoprotein spacing of unliganded HA trimers, receptor binding promotes HA trimer clustering and the formation of a triplet of trimers. Subtomogram averaging and refinement yielded 8 to 10 Å reconstructions that allowed us to visualize specific contacts between HAs from neighboring trimers and identify molecular features that mediate clustering. Taken together, we present structural evidence that receptor binding triggers clustering of HA trimers, revealing an additional layer of HA dynamics and plasticity. | |||||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 506.8 KB | 表示 | ![]() |
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PDB形式 | ![]() | 426.3 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 47030MC 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 ![]() |
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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: 36733.402 Da / 分子数: 6 / 由来タイプ: 天然 由来: (天然) ![]() 株: A/Puerto Rico/8/1934 / 参照: UniProt: P03452 #2: タンパク質 | 分子量: 18242.221 Da / 分子数: 6 / 由来タイプ: 天然 由来: (天然) ![]() 株: A/Puerto Rico/8/1934 / 参照: UniProt: P03452 #3: 多糖 | N-acetyl-alpha-neuraminic acid-(2-6)-beta-D-galactopyranose 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: サブトモグラム平均法 |
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試料調製
構成要素 | 名称: Influenza A virus (A/Puerto Rico/8/1934(H1N1)) / タイプ: VIRUS 詳細: Virus produced in embryonated eggs and purified from allantoic fluid. Entity ID: #1-#2 / 由来: NATURAL |
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由来(天然) | 生物種: ![]() 株: A/Puerto Rico/8/1934 |
ウイルスについての詳細 | 中空か: NO / エンベロープを持つか: YES / 単離: STRAIN / タイプ: VIRION |
緩衝液 | pH: 7.4 |
試料 | 濃度: 1 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES 詳細: Virus was incubated with Sialylneolacto-N-tetraose c (LSTc) at a final concentration of 100 um |
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 200 divisions/in. / グリッドのタイプ: Quantifoil R2/2 |
急速凍結 | 装置: EMS-002 RAPID IMMERSION FREEZER / 凍結剤: ETHANE-PROPANE |
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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: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 42000 X / 最大 デフォーカス(公称値): 6000 nm / 最小 デフォーカス(公称値): 3000 nm / Cs: 2.7 mm |
試料ホルダ | 凍結剤: NITROGEN |
撮影 | 電子線照射量: 1.86 e/Å2 / Avg electron dose per subtomogram: 120 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||
3次元再構成 | 解像度: 9 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 9283 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
EM volume selection | Num. of tomograms: 16 / Num. of volumes extracted: 26500 | ||||||||||||||||||||||||
原子モデル構築 | プロトコル: FLEXIBLE FIT / 空間: REAL 詳細: Rigid body docking was performed in ChimeraX. Phenix was used for flexible real space refinement and Schrodinger Protein Preparation Wizard was used to perform final energy minimization. | ||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 1RVZ Accession code: 1RVZ / Source name: PDB / タイプ: experimental model |