- EMDB-6077: Characterization of a broadly neutralizing monoclonal antibody th... -
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基本情報
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データベース: EMDB / ID: EMD-6077
タイトル
Characterization of a broadly neutralizing monoclonal antibody that targets the fusion domain of group 2 influenza A virus hemagglutinin
マップデータ
Negative stain reconstruction of Fab 9H10 bound to hemagglutinin (H3) from Influenza A/Hong Kong/1/1968 (H3N2), initiated with common lines, refined with projection matching against single particles, under C3 symmetry
試料
試料: Fab 9H10 bound to hemagglutinin (H3) from Influenza A/Hong Kong/1/1968 (H3N2)
タンパク質・ペプチド: hemagglutinin
タンパク質・ペプチド: Fab of monoclonal antibody 9H10
キーワード
group 2 influenza A virus / broadly neutralizing antibody
生物種
Influenza A virus (A型インフルエンザウイルス) / Mus musculus (ハツカネズミ)
ジャーナル: J Virol / 年: 2014 タイトル: Characterization of a broadly neutralizing monoclonal antibody that targets the fusion domain of group 2 influenza A virus hemagglutinin. 著者: Gene S Tan / Peter S Lee / Ryan M B Hoffman / Beryl Mazel-Sanchez / Florian Krammer / Paul E Leon / Andrew B Ward / Ian A Wilson / Peter Palese / 要旨: Due to continuous changes to its antigenic regions, influenza viruses can evade immune detection and cause a significant amount of morbidity and mortality around the world. Influenza vaccinations can ...Due to continuous changes to its antigenic regions, influenza viruses can evade immune detection and cause a significant amount of morbidity and mortality around the world. Influenza vaccinations can protect against disease but must be annually reformulated to match the current circulating strains. In the development of a broad-spectrum influenza vaccine, the elucidation of conserved epitopes is paramount. To this end, we designed an immunization strategy in mice to boost the humoral response against conserved regions of the hemagglutinin (HA) glycoprotein. Of note, generation and identification of broadly neutralizing antibodies that target group 2 HAs are rare and thus far have yielded only a few monoclonal antibodies (MAbs). Here, we demonstrate that mouse MAb 9H10 has broad and potent in vitro neutralizing activity against H3 and H10 group 2 influenza A subtypes. In the mouse model, MAb 9H10 protects mice against two divergent mouse-adapted H3N2 strains, in both pre- and postexposure administration regimens. In vitro and cell-free assays suggest that MAb 9H10 inhibits viral replication by blocking HA-dependent fusion of the viral and endosomal membranes early in the replication cycle and by disrupting viral particle egress in the late stage of infection. Interestingly, electron microscopy reconstructions of MAb 9H10 bound to the HA reveal that it binds a similar binding footprint to MAbs CR8020 and CR8043. IMPORTANCE: The influenza hemagglutinin is the major antigenic target of the humoral immune response. However, due to continuous antigenic changes that occur on the surface of this glycoprotein, ...IMPORTANCE: The influenza hemagglutinin is the major antigenic target of the humoral immune response. However, due to continuous antigenic changes that occur on the surface of this glycoprotein, influenza viruses can escape the immune system and cause significant disease to the host. Toward the development of broad-spectrum therapeutics and vaccines against influenza virus, elucidation of conserved regions of influenza viruses is crucial. Thus, defining these types of epitopes through the generation and characterization of broadly neutralizing monoclonal antibodies (MAbs) can greatly assist others in highlighting conserved regions of hemagglutinin. Here, we demonstrate that MAb 9H10 that targets the hemagglutinin stalk has broadly neutralizing activity against group 2 influenza A viruses in vitro and in vivo.
ダウンロード / ファイル: emd_6077.map.gz / 形式: CCP4 / 大きさ: 1001 KB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
注釈
Negative stain reconstruction of Fab 9H10 bound to hemagglutinin (H3) from Influenza A/Hong Kong/1/1968 (H3N2), initiated with common lines, refined with projection matching against single particles, under C3 symmetry
全体 : Fab 9H10 bound to hemagglutinin (H3) from Influenza A/Hong Kong/1...
全体
名称: Fab 9H10 bound to hemagglutinin (H3) from Influenza A/Hong Kong/1/1968 (H3N2)
要素
試料: Fab 9H10 bound to hemagglutinin (H3) from Influenza A/Hong Kong/1/1968 (H3N2)
タンパク質・ペプチド: hemagglutinin
タンパク質・ペプチド: Fab of monoclonal antibody 9H10
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超分子 #1000: Fab 9H10 bound to hemagglutinin (H3) from Influenza A/Hong Kong/1...
超分子
名称: Fab 9H10 bound to hemagglutinin (H3) from Influenza A/Hong Kong/1/1968 (H3N2) タイプ: sample / ID: 1000 集合状態: one hemagglutinin homotrimer binds to three 9H10 Fabs Number unique components: 2