+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 3jcc | ||||||
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タイトル | Structure of Simian Immunodeficiency Virus Envelope Spikes bound with CD4 and Monoclonal Antibody 36D5 | ||||||
要素 |
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キーワード | VIRAL PROTEIN/IMMUNE SYSTEM / Cryoelectron tomography / immunology / AIDS / HIV / VIRAL PROTEIN-IMMUNE SYSTEM complex | ||||||
機能・相同性 | 機能・相同性情報 helper T cell enhancement of adaptive immune response / interleukin-16 binding / interleukin-16 receptor activity / maintenance of protein location in cell / T cell selection / MHC class II protein binding / regulation of T cell activation / interleukin-15-mediated signaling pathway / cellular response to granulocyte macrophage colony-stimulating factor stimulus / positive regulation of kinase activity ...helper T cell enhancement of adaptive immune response / interleukin-16 binding / interleukin-16 receptor activity / maintenance of protein location in cell / T cell selection / MHC class II protein binding / regulation of T cell activation / interleukin-15-mediated signaling pathway / cellular response to granulocyte macrophage colony-stimulating factor stimulus / positive regulation of kinase activity / positive regulation of monocyte differentiation / Nef Mediated CD4 Down-regulation / Alpha-defensins / extracellular matrix structural constituent / T cell receptor complex / Other interleukin signaling / enzyme-linked receptor protein signaling pathway / Translocation of ZAP-70 to Immunological synapse / Phosphorylation of CD3 and TCR zeta chains / regulation of calcium ion transport / macrophage differentiation / Generation of second messenger molecules / T cell differentiation / PD-1 signaling / positive regulation of protein kinase activity / Binding and entry of HIV virion / coreceptor activity / cell surface receptor protein tyrosine kinase signaling pathway / positive regulation of interleukin-2 production / positive regulation of calcium-mediated signaling / protein tyrosine kinase binding / T cell activation / Vpu mediated degradation of CD4 / calcium-mediated signaling / clathrin-coated endocytic vesicle membrane / positive regulation of peptidyl-tyrosine phosphorylation / positive regulation of T cell activation / transmembrane signaling receptor activity / Cargo recognition for clathrin-mediated endocytosis / Downstream TCR signaling / MHC class II protein complex binding / Clathrin-mediated endocytosis / signaling receptor activity / virus receptor activity / positive regulation of canonical NF-kappaB signal transduction / defense response to Gram-negative bacterium / adaptive immune response / positive regulation of MAPK cascade / positive regulation of ERK1 and ERK2 cascade / positive regulation of viral entry into host cell / early endosome / cell surface receptor signaling pathway / cell adhesion / immune response / positive regulation of protein phosphorylation / membrane raft / endoplasmic reticulum lumen / external side of plasma membrane / lipid binding / viral envelope / endoplasmic reticulum membrane / protein kinase binding / positive regulation of DNA-templated transcription / enzyme binding / signal transduction / protein homodimerization activity / zinc ion binding / identical protein binding / plasma membrane 類似検索 - 分子機能 | ||||||
生物種 | Simian immunodeficiency virus (サル免疫不全ウイルス) Homo sapiens (ヒト) | ||||||
手法 | 電子顕微鏡法 / 電子線トモグラフィー法 / クライオ電子顕微鏡法 | ||||||
データ登録者 | Hu, G. / Liu, J. / Roux, K. / Taylor, K.A. | ||||||
引用 | ジャーナル: J Virol / 年: 2017 タイトル: Structure of Simian Immunodeficiency Virus Envelope Spikes Bound with CD4 and Monoclonal Antibody 36D5. 著者: Guiqing Hu / Jun Liu / Kenneth H Roux / Kenneth A Taylor / 要旨: The human immunodeficiency virus type 1 (HIV-1)/simian immunodeficiency virus (SIV) envelope spike (Env) mediates viral entry into host cells. The V3 loop of the gp120 component of the Env trimer ...The human immunodeficiency virus type 1 (HIV-1)/simian immunodeficiency virus (SIV) envelope spike (Env) mediates viral entry into host cells. The V3 loop of the gp120 component of the Env trimer contributes to the coreceptor binding site and is a target for neutralizing antibodies. We used cryo-electron tomography to visualize the binding of CD4 and the V3 loop monoclonal antibody (MAb) 36D5 to gp120 of the SIV Env trimer. Our results show that 36D5 binds gp120 at the base of the V3 loop and suggest that the antibody exerts its neutralization effect by blocking the coreceptor binding site. The antibody does this without altering the dynamics of the spike motion between closed and open states when CD4 is bound. The interaction between 36D5 and SIV gp120 is similar to the interaction between some broadly neutralizing anti-V3 loop antibodies and HIV-1 gp120. Two conformations of gp120 bound with CD4 are revealed, suggesting an intrinsic dynamic nature of the liganded Env trimer. CD4 binding substantially increases the binding of 36D5 to gp120 in the intact Env trimer, consistent with CD4-induced changes in the conformation of gp120 and the antibody binding site. Binding by MAb 36D5 does not substantially alter the proportions of the two CD4-bound conformations. The position of MAb 36D5 at the V3 base changes little between conformations, indicating that the V3 base serves as a pivot point during the transition between these two states. Glycoprotein spikes on the surfaces of SIV and HIV are the sole targets available to the immune system for antibody neutralization. Spikes evade the immune system by a combination of a thick layer of polysaccharide on the surface (the glycan shield) and movement between spike domains that masks the epitope conformation. Using SIV virions whose spikes were "decorated" with the primary cellular receptor (CD4) and an antibody (36D5) at part of the coreceptor binding site, we visualized multiple conformations trapped by the rapid freezing step, which were separated using statistical analysis. Our results show that the CD4-induced conformational dynamics of the spike enhances binding of the antibody. | ||||||
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 | 3jcc.cif.gz | 377.6 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb3jcc.ent.gz | 302 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 3jcc.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
文書・要旨 | 3jcc_validation.pdf.gz | 395.1 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 3jcc_full_validation.pdf.gz | 410.2 KB | 表示 | |
XML形式データ | 3jcc_validation.xml.gz | 39 KB | 表示 | |
CIF形式データ | 3jcc_validation.cif.gz | 66.6 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/jc/3jcc ftp://data.pdbj.org/pub/pdb/validation_reports/jc/3jcc | HTTPS FTP |
-関連構造データ
-リンク
-集合体
登録構造単位 |
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1 |
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-要素
#1: タンパク質 | 分子量: 50130.594 Da / 分子数: 3 / 断片: SEE REMARK 999 / 由来タイプ: 天然 由来: (天然) Simian immunodeficiency virus (サル免疫不全ウイルス) 株: SIV239/251tail/Supt-CCR5 CL.30 / 参照: UniProt: A0A3B6UDT5*PLUS #2: 抗体 | | 分子量: 22291.643 Da / 分子数: 1 / 断片: Fab / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) #3: 抗体 | | 分子量: 25115.289 Da / 分子数: 1 / 断片: Fab / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) #4: タンパク質 | | 分子量: 19442.045 Da / 分子数: 1 / 断片: UNP residues 26-200 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P01730 Has protein modification | Y | 配列の詳細 | ENVELOPE GLYCOPROTE | |
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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: CELL / 3次元再構成法: 電子線トモグラフィー法 |
-試料調製
構成要素 |
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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 / ホストのカテゴリ: VERTEBRATES / 単離: STRAIN / タイプ: VIRION | ||||||||||||||||||||
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||
急速凍結 | 装置: HOMEMADE PLUNGER / 凍結剤: ETHANE / 詳細: Plunged into liquid ethane. |
-電子顕微鏡撮影
実験機器 | モデル: Tecnai Polara / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI POLARA 300 / 日付: 2008年8月16日 |
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 / 倍率(公称値): 31000 X / 最大 デフォーカス(公称値): 5000 nm / 最小 デフォーカス(公称値): 4000 nm |
試料ホルダ | 試料ホルダーモデル: OTHER / 資料ホルダタイプ: unidentified / 傾斜角・最大: 65 ° / 傾斜角・最小: -65 ° |
撮影 | 電子線照射量: 100 e/Å2 フィルム・検出器のモデル: TVIPS TEMCAM-F415 (4k x 4k) |
-解析
対称性 | 点対称性: C1 (非対称) | ||||||||||||
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3次元再構成 | 粒子像の数: 1796 / ピクセルサイズ(公称値): 5.7 Å / ピクセルサイズ(実測値): 5.7 Å / 詳細: (Subtomogram Averaging--Applied Symmetry: C1) / 対称性のタイプ: POINT | ||||||||||||
原子モデル構築 | プロトコル: RIGID BODY FIT / 空間: REAL | ||||||||||||
原子モデル構築 | PDB-ID: 4NCO Accession code: 4NCO / Source name: PDB / タイプ: experimental model | ||||||||||||
精密化ステップ | サイクル: LAST
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