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Nature Structural & Molecular Biology
Article . 2016 . Peer-reviewed
License: Springer TDM
Data sources: Crossref
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Natively glycosylated HIV-1 Env structure reveals new mode for antibody recognition of the CD4-binding site

Authors: Gristick, Harry B.; von Boehmer, Lotta; West, Anthony P., Jr.; Schamber, Michael; Gazumyan, Anna; Golijanin, Jovana; Seaman, Michael S.; +4 Authors

Natively glycosylated HIV-1 Env structure reveals new mode for antibody recognition of the CD4-binding site

Abstract

HIV-1 vaccine design is informed by structural studies elucidating mechanisms by which broadly neutralizing antibodies (bNAbs) recognize and/or accommodate N-glycans on the trimeric envelope glycoprotein (Env). Variability in high-mannose and complex-type Env glycoforms leads to heterogeneity that usually precludes visualization of the native glycan shield. We present 3.5-Å- and 3.9-Å-resolution crystal structures of the HIV-1 Env trimer with fully processed and native glycosylation, revealing a glycan shield of high-mannose and complex-type N-glycans, which we used to define complete epitopes of two bNAbs. Env trimer was complexed with 10-1074 (against the V3-loop) and IOMA, a new CD4-binding site (CD4bs) antibody. Although IOMA derives from VH1-2*02, the germline gene of CD4bs-targeting VRC01-class bNAbs, its light chain lacks the short CDRL3 that defines VRC01-class bNAbs. Thus IOMA resembles 8ANC131-class/VH1-46-derived CD4bs bNAbs, which have normal-length CDRL3s. The existence of bNAbs that combine features of VRC01-class and 8ANC131-class antibodies has implications for immunization strategies targeting VRC01-like bNAbs.

Country
United States
Keywords

Models, Molecular, 570, Glycosylation, Protein Conformation, 610, HIV Infections, HIV Antibodies, HIV Envelope Protein gp120, Crystallography, X-Ray, Antibodies, Neutralizing, Epitopes, Polysaccharides, CD4 Antigens, HIV-1, Humans, Protein Multimerization, Mannose

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    187
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    Top 1%
    influence
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    impulse
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
187
Top 1%
Top 10%
Top 1%
Green
bronze