Crystal Structure of HIV-1 BG505 SOSIP.664 Prefusion Env Trimer in Complex with V3 Loop-targeting Antibody PGT122 Fab and Fusion Peptide-targeting Antibody VRC34.01 Fab
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
United States
Citation
Journal: Science / Year: 2016 Title: Fusion peptide of HIV-1 as a site of vulnerability to neutralizing antibody. Authors: Rui Kong / Kai Xu / Tongqing Zhou / Priyamvada Acharya / Thomas Lemmin / Kevin Liu / Gabriel Ozorowski / Cinque Soto / Justin D Taft / Robert T Bailer / Evan M Cale / Lei Chen / Chang W Choi ...Authors: Rui Kong / Kai Xu / Tongqing Zhou / Priyamvada Acharya / Thomas Lemmin / Kevin Liu / Gabriel Ozorowski / Cinque Soto / Justin D Taft / Robert T Bailer / Evan M Cale / Lei Chen / Chang W Choi / Gwo-Yu Chuang / Nicole A Doria-Rose / Aliaksandr Druz / Ivelin S Georgiev / Jason Gorman / Jinghe Huang / M Gordon Joyce / Mark K Louder / Xiaochu Ma / Krisha McKee / Sijy O'Dell / Marie Pancera / Yongping Yang / Scott C Blanchard / Walther Mothes / Dennis R Burton / Wayne C Koff / Mark Connors / Andrew B Ward / Peter D Kwong / John R Mascola / Abstract: The HIV-1 fusion peptide, comprising 15 to 20 hydrophobic residues at the N terminus of the Env-gp41 subunit, is a critical component of the virus-cell entry machinery. Here, we report the ...The HIV-1 fusion peptide, comprising 15 to 20 hydrophobic residues at the N terminus of the Env-gp41 subunit, is a critical component of the virus-cell entry machinery. Here, we report the identification of a neutralizing antibody, N123-VRC34.01, which targets the fusion peptide and blocks viral entry by inhibiting conformational changes in gp120 and gp41 subunits of Env required for entry. Crystal structures of N123-VRC34.01 liganded to the fusion peptide, and to the full Env trimer, revealed an epitope consisting of the N-terminal eight residues of the gp41 fusion peptide and glycan N88 of gp120, and molecular dynamics showed that the N-terminal portion of the fusion peptide can be solvent-exposed. These results reveal the fusion peptide to be a neutralizing antibody epitope and thus a target for vaccine design.
#62 - Feb 2005 Major Histocompatibility Complex similarity (6)
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Assembly
Deposited unit
A: BG505 SOSIP.664 gp120 B: BG505 SOSIP.664 gp41 C: BG505 SOSIP.664 gp120 L: PGT122 Fab light chain E: VRC34.01 Fab heavy chain F: VRC34.01 Fab light chain G: VRC34.01 Fab heavy chain D: BG505 SOSIP.664 gp41 H: VRC34.01 Fab light chain I: PGT122 Fab heavy chain J: PGT122 Fab light chain K: PGT122 Fab heavy chain hetero molecules
A: BG505 SOSIP.664 gp120 B: BG505 SOSIP.664 gp41 E: VRC34.01 Fab heavy chain F: VRC34.01 Fab light chain I: PGT122 Fab heavy chain J: PGT122 Fab light chain hetero molecules
A: BG505 SOSIP.664 gp120 B: BG505 SOSIP.664 gp41 E: VRC34.01 Fab heavy chain F: VRC34.01 Fab light chain I: PGT122 Fab heavy chain J: PGT122 Fab light chain hetero molecules
A: BG505 SOSIP.664 gp120 B: BG505 SOSIP.664 gp41 E: VRC34.01 Fab heavy chain F: VRC34.01 Fab light chain I: PGT122 Fab heavy chain J: PGT122 Fab light chain hetero molecules
C: BG505 SOSIP.664 gp120 L: PGT122 Fab light chain G: VRC34.01 Fab heavy chain D: BG505 SOSIP.664 gp41 H: VRC34.01 Fab light chain K: PGT122 Fab heavy chain hetero molecules
C: BG505 SOSIP.664 gp120 L: PGT122 Fab light chain G: VRC34.01 Fab heavy chain D: BG505 SOSIP.664 gp41 H: VRC34.01 Fab light chain K: PGT122 Fab heavy chain hetero molecules
C: BG505 SOSIP.664 gp120 L: PGT122 Fab light chain G: VRC34.01 Fab heavy chain D: BG505 SOSIP.664 gp41 H: VRC34.01 Fab light chain K: PGT122 Fab heavy chain hetero molecules