California HIV/AIDS Research Program Dissertation Award
D12-SRI-353
米国
Scripps CHAVI-ID
UM1 AI100663
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI110657
米国
International AIDS Vaccine Initiative
米国
Bill & Melinda Gates Foundation
OPP1115782 and OPP1084519
米国
引用
ジャーナル: Immunity / 年: 2017 タイトル: A Broadly Neutralizing Antibody Targets the Dynamic HIV Envelope Trimer Apex via a Long, Rigidified, and Anionic β-Hairpin Structure. 著者: Jeong Hyun Lee / Raiees Andrabi / Ching-Yao Su / Anila Yasmeen / Jean-Philippe Julien / Leopold Kong / Nicholas C Wu / Ryan McBride / Devin Sok / Matthias Pauthner / Christopher A Cottrell / ...著者: Jeong Hyun Lee / Raiees Andrabi / Ching-Yao Su / Anila Yasmeen / Jean-Philippe Julien / Leopold Kong / Nicholas C Wu / Ryan McBride / Devin Sok / Matthias Pauthner / Christopher A Cottrell / Travis Nieusma / Claudia Blattner / James C Paulson / Per Johan Klasse / Ian A Wilson / Dennis R Burton / Andrew B Ward / 要旨: Broadly neutralizing antibodies (bnAbs) to HIV delineate vaccine targets and are prophylactic and therapeutic agents. Some of the most potent bnAbs target a quaternary epitope at the apex of the ...Broadly neutralizing antibodies (bnAbs) to HIV delineate vaccine targets and are prophylactic and therapeutic agents. Some of the most potent bnAbs target a quaternary epitope at the apex of the surface HIV envelope (Env) trimer. Using cryo-electron microscopy, we solved the atomic structure of an apex bnAb, PGT145, in complex with Env. We showed that the long anionic HCDR3 of PGT145 penetrated between glycans at the trimer 3-fold axis, to contact peptide residues from all three Env protomers, and thus explains its highly trimer-specific nature. Somatic hypermutation in the other CDRs of PGT145 were crucially involved in stabilizing the structure of the HCDR3, similar to bovine antibodies, to aid in recognition of a cluster of conserved basic residues hypothesized to facilitate trimer disassembly during viral entry. Overall, the findings exemplify the creative solutions that the human immune system can evolve to recognize a conserved motif buried under a canopy of glycans.