ジャーナル: Cell / 年: 2015 タイトル: Mechanism of human antibody-mediated neutralization of Marburg virus. 著者: Andrew I Flyak / Philipp A Ilinykh / Charles D Murin / Tania Garron / Xiaoli Shen / Marnie L Fusco / Takao Hashiguchi / Zachary A Bornholdt / James C Slaughter / Gopal Sapparapu / Curtis ...著者: Andrew I Flyak / Philipp A Ilinykh / Charles D Murin / Tania Garron / Xiaoli Shen / Marnie L Fusco / Takao Hashiguchi / Zachary A Bornholdt / James C Slaughter / Gopal Sapparapu / Curtis Klages / Thomas G Ksiazek / Andrew B Ward / Erica Ollmann Saphire / Alexander Bukreyev / James E Crowe / 要旨: The mechanisms by which neutralizing antibodies inhibit Marburg virus (MARV) are not known. We isolated a panel of neutralizing antibodies from a human MARV survivor that bind to MARV glycoprotein ...The mechanisms by which neutralizing antibodies inhibit Marburg virus (MARV) are not known. We isolated a panel of neutralizing antibodies from a human MARV survivor that bind to MARV glycoprotein (GP) and compete for binding to a single major antigenic site. Remarkably, several of the antibodies also bind to Ebola virus (EBOV) GP. Single-particle EM structures of antibody-GP complexes reveal that all of the neutralizing antibodies bind to MARV GP at or near the predicted region of the receptor-binding site. The presence of the glycan cap or mucin-like domain blocks binding of neutralizing antibodies to EBOV GP, but not to MARV GP. The data suggest that MARV-neutralizing antibodies inhibit virus by binding to infectious virions at the exposed MARV receptor-binding site, revealing a mechanism of filovirus inhibition.