National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
P01 AI082362
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
UM1 AI100663
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
R01 AI084817
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI114401
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI098602
米国
Bill & Melinda Gates Foundation
米国
引用
ジャーナル: Nat Commun / 年: 2015 タイトル: Antibodies to a conformational epitope on gp41 neutralize HIV-1 by destabilizing the Env spike. 著者: Jeong Hyun Lee / Daniel P Leaman / Arthur S Kim / Alba Torrents de la Peña / Kwinten Sliepen / Anila Yasmeen / Ronald Derking / Alejandra Ramos / Steven W de Taeye / Gabriel Ozorowski / ...著者: Jeong Hyun Lee / Daniel P Leaman / Arthur S Kim / Alba Torrents de la Peña / Kwinten Sliepen / Anila Yasmeen / Ronald Derking / Alejandra Ramos / Steven W de Taeye / Gabriel Ozorowski / Florian Klein / Dennis R Burton / Michel C Nussenzweig / Pascal Poignard / John P Moore / Per Johan Klasse / Rogier W Sanders / Michael B Zwick / Ian A Wilson / Andrew B Ward / 要旨: The recent identification of three broadly neutralizing antibodies (bnAbs) against gp120-gp41 interface epitopes has expanded the targetable surface on the HIV-1 envelope glycoprotein (Env) trimer. ...The recent identification of three broadly neutralizing antibodies (bnAbs) against gp120-gp41 interface epitopes has expanded the targetable surface on the HIV-1 envelope glycoprotein (Env) trimer. By using biochemical, biophysical and computational methods, we map the previously unknown trimer epitopes of two related antibodies, 3BC315 and 3BC176. A cryo-EM reconstruction of a soluble Env trimer bound to 3BC315 Fab at 9.3 Å resolution reveals that the antibody binds between two gp41 protomers, and neutralizes the virus by accelerating trimer decay. In contrast, bnAb 35O22 binding to a partially overlapping quaternary epitope at the gp120-gp41 interface does not induce decay. A conserved gp41-proximal glycan at N88 was also shown to play a role in the binding kinetics of 3BC176 and 3BC315. Finally, our data suggest that the dynamic structure of the Env trimer influences exposure of bnAb epitopes.