National Key Research and Development Program of China
2016YFC1200400
中国
引用
ジャーナル: Nat Microbiol / 年: 2018 タイトル: Structural basis for neutralization of Japanese encephalitis virus by two potent therapeutic antibodies. 著者: Xiaodi Qiu / Yingfeng Lei / Pan Yang / Qiang Gao / Nan Wang / Lei Cao / Shuai Yuan / Xiaofang Huang / Yongqiang Deng / Wenyu Ma / Tianbing Ding / Fanglin Zhang / Xingan Wu / Junjie Hu / Shan- ...著者: Xiaodi Qiu / Yingfeng Lei / Pan Yang / Qiang Gao / Nan Wang / Lei Cao / Shuai Yuan / Xiaofang Huang / Yongqiang Deng / Wenyu Ma / Tianbing Ding / Fanglin Zhang / Xingan Wu / Junjie Hu / Shan-Lu Liu / Chengfeng Qin / Xiangxi Wang / Zhikai Xu / Zihe Rao / 要旨: Japanese encephalitis virus (JEV), closely related to dengue, Zika, yellow fever and West Nile viruses, remains neglected and not well characterized . JEV is the leading causative agent of ...Japanese encephalitis virus (JEV), closely related to dengue, Zika, yellow fever and West Nile viruses, remains neglected and not well characterized . JEV is the leading causative agent of encephalitis, and is responsible for thousands of deaths each year in Asia. Humoral immunity is essential for protecting against flavivirus infections and passive immunization has been demonstrated to be effective in curing disease. Here, we demonstrate that JEV-specific monoclonal antibodies, 2F2 and 2H4, block attachment of the virus to its receptor and also prevent fusion of the virus. Neutralization of JEV by these antibodies is exceptionally potent and confers clear therapeutic benefit in mouse models. A single 20 μg dose of these antibodies resulted in 100% survival and complete clearance of JEV from the brains of mice. The 4.7 Å and 4.6 Å resolution cryo-electron microscopy structures of JEV-2F2-Fab and JEV-2H4-Fab complexes, together with the crystal structure of 2H4 Fab and our recent near-atomic structure of JEV , unveil the nature and location of epitopes targeted by the antibodies. Both 2F2 and 2H4 Fabs bind quaternary epitopes that span across three adjacent envelope proteins. Our results provide a structural and molecular basis for the application of 2F2 and 2H4 to treat JEV infection.
履歴
登録
2017年11月29日
登録サイト: PDBJ / 処理サイト: PDBJ
改定 1.0
2018年3月21日
Provider: repository / タイプ: Initial release
改定 1.1
2018年9月12日
Group: Data collection / Source and taxonomy / カテゴリ: entity_src_nat Item: _entity_src_nat.pdbx_ncbi_taxonomy_id / _entity_src_nat.pdbx_organism_scientific
A: JEV E protein B: JEV M protein C: JEV E protein D: JEV M protein E: JEV E protein F: JEV M protein M: 2F2 light chain N: 2F2 heavy chain Q: 2F2 light chain R: 2F2 heavy chain
A: JEV E protein B: JEV M protein C: JEV E protein D: JEV M protein E: JEV E protein F: JEV M protein M: 2F2 light chain N: 2F2 heavy chain Q: 2F2 light chain R: 2F2 heavy chain
A: JEV E protein B: JEV M protein C: JEV E protein D: JEV M protein E: JEV E protein F: JEV M protein M: 2F2 light chain N: 2F2 heavy chain Q: 2F2 light chain R: 2F2 heavy chain
x 5
icosahedral pentamer
1.4 MDa, 50 ポリマー
分子量 (理論値)
分子数
合計 (水以外)
1,400,465
50
ポリマ-
1,400,465
50
非ポリマー
0
0
水
0
タイプ
名称
対称操作
数
identity operation
1_555
x,y,z
1
point symmetry operation
4
4
A: JEV E protein B: JEV M protein C: JEV E protein D: JEV M protein E: JEV E protein F: JEV M protein M: 2F2 light chain N: 2F2 heavy chain Q: 2F2 light chain R: 2F2 heavy chain
x 6
icosahedral 23 hexamer
1.68 MDa, 60 ポリマー
分子量 (理論値)
分子数
合計 (水以外)
1,680,558
60
ポリマ-
1,680,558
60
非ポリマー
0
0
水
0
タイプ
名称
対称操作
数
identity operation
1_555
x,y,z
1
point symmetry operation
5
5
登録構造と同一(異なる座標系)
icosahedral asymmetric unit, std point frame
タイプ
名称
対称操作
数
transform to point frame
1
6
A: JEV E protein B: JEV M protein C: JEV E protein D: JEV M protein E: JEV E protein F: JEV M protein M: 2F2 light chain N: 2F2 heavy chain Q: 2F2 light chain R: 2F2 heavy chain