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Site-specific glycosylation of virion-derived HIV-1 env is mimicked by a soluble trimeric immunogen

Site-specific glycosylation of virion-derived HIV-1 env is mimicked by a soluble trimeric immunogen
Site-specific glycosylation of virion-derived HIV-1 env is mimicked by a soluble trimeric immunogen

Many broadly neutralizing antibodies (bnAbs) against HIV-1 recognize and/or penetrate the glycan shield on native, virion-associated envelope glycoprotein (Env) spikes. The same bnAbs also bind to recombinant, soluble trimeric immunogens based on the SOSIP design. While SOSIP trimers are close structural and antigenic mimics of virion Env, the extent to which their glycan structures resemble ones on infectious viruses is undefined. Here, we compare the overall glycosylation of gp120 and gp41 subunits from BG505 (clade A) virions produced in a lymphoid cell line with those from recombinant BG505 SOSIP trimers, including CHO-derived clinical grade material. We also performed detailed site-specific analyses of gp120. Glycans relevant to key bnAb epitopes are generally similar on the recombinant SOSIP and virion-derived Env proteins, although the latter do contain hotspots of elevated glycan processing. Knowledge of native versus recombinant Env glycosylation will guide vaccine design and manufacturing programs. Struwe et al. present site-specific analyses of N-glycosylation sites on HIV-1 envelope glycoproteins from an infectious virus and a recombinant trimer mimic. The structural and antigenic details of the glycan shield will be valuable for designing next-generation immunogens and understanding virus neutralization by broadly active antibodies.

envelope glycoprotein, glycosylation, HIV, mass spectrometry
2211-1247
1958-1966.e5
Struwe, Weston B.
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Chertova, Elena
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Allen, Joel D.
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Seabright, Gemma E.
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Watanabe, Yasunori
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Harvey, David J.
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Medina-Ramirez, Max
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Roser, James D.
dd1f1b2f-953c-4c14-ab6c-cda43f5c291a
Smith, Rodman
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Westcott, David
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Keele, Brandon F.
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Bess, Julian W.
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Sanders, Rogier W.
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Lifson, Jeffrey D.
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Moore, John P.
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Crispin, Max
cd980957-0943-4b89-b2b2-710f01f33bc9
Struwe, Weston B.
16a348b1-3921-4a2d-b5fb-d341fccea65f
Chertova, Elena
4f3e06c8-3955-4b89-acf7-dd9432081aa9
Allen, Joel D.
c89d5569-7659-4835-b535-c9586e956b3a
Seabright, Gemma E.
09e75998-09b0-465f-a059-c89b07f3b2c3
Watanabe, Yasunori
8c0ee4af-a293-4de5-9036-3ce2051b380c
Harvey, David J.
261201b9-2ec2-4f49-bd32-eadac805da98
Medina-Ramirez, Max
bd603493-0191-4117-b9d3-3e991b406ec8
Roser, James D.
dd1f1b2f-953c-4c14-ab6c-cda43f5c291a
Smith, Rodman
2e8eab70-b47a-4b5a-a0a0-d60981723689
Westcott, David
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Keele, Brandon F.
0c5b4c59-052f-4566-bb55-9d4d1004e46e
Bess, Julian W.
5521c35a-be85-4034-9682-7578ab5a3f83
Sanders, Rogier W.
d3b67c2c-c725-42e7-b972-50b30be67c74
Lifson, Jeffrey D.
4f62d1c5-24c3-44d7-b240-cb429da56c5f
Moore, John P.
3c26226c-c036-48db-bbd1-828a86b29697
Crispin, Max
cd980957-0943-4b89-b2b2-710f01f33bc9

Struwe, Weston B., Chertova, Elena, Allen, Joel D., Seabright, Gemma E., Watanabe, Yasunori, Harvey, David J., Medina-Ramirez, Max, Roser, James D., Smith, Rodman, Westcott, David, Keele, Brandon F., Bess, Julian W., Sanders, Rogier W., Lifson, Jeffrey D., Moore, John P. and Crispin, Max (2018) Site-specific glycosylation of virion-derived HIV-1 env is mimicked by a soluble trimeric immunogen. Cell Reports, 24 (8), 1958-1966.e5. (doi:10.1016/j.celrep.2018.07.080).

Record type: Article

Abstract

Many broadly neutralizing antibodies (bnAbs) against HIV-1 recognize and/or penetrate the glycan shield on native, virion-associated envelope glycoprotein (Env) spikes. The same bnAbs also bind to recombinant, soluble trimeric immunogens based on the SOSIP design. While SOSIP trimers are close structural and antigenic mimics of virion Env, the extent to which their glycan structures resemble ones on infectious viruses is undefined. Here, we compare the overall glycosylation of gp120 and gp41 subunits from BG505 (clade A) virions produced in a lymphoid cell line with those from recombinant BG505 SOSIP trimers, including CHO-derived clinical grade material. We also performed detailed site-specific analyses of gp120. Glycans relevant to key bnAb epitopes are generally similar on the recombinant SOSIP and virion-derived Env proteins, although the latter do contain hotspots of elevated glycan processing. Knowledge of native versus recombinant Env glycosylation will guide vaccine design and manufacturing programs. Struwe et al. present site-specific analyses of N-glycosylation sites on HIV-1 envelope glycoproteins from an infectious virus and a recombinant trimer mimic. The structural and antigenic details of the glycan shield will be valuable for designing next-generation immunogens and understanding virus neutralization by broadly active antibodies.

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Accepted/In Press date: 24 July 2018
e-pub ahead of print date: 24 August 2018
Published date: August 2018
Keywords: envelope glycoprotein, glycosylation, HIV, mass spectrometry

Identifiers

Local EPrints ID: 424472
URI: http://eprints.soton.ac.uk/id/eprint/424472
ISSN: 2211-1247
PURE UUID: 7ac028ec-3d32-4042-aacd-18c778d45e0c
ORCID for Joel D. Allen: ORCID iD orcid.org/0000-0003-2547-968X
ORCID for Max Crispin: ORCID iD orcid.org/0000-0002-1072-2694

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Date deposited: 05 Oct 2018 11:37
Last modified: 12 Jul 2024 02:09

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Contributors

Author: Weston B. Struwe
Author: Elena Chertova
Author: Joel D. Allen ORCID iD
Author: Gemma E. Seabright
Author: Yasunori Watanabe
Author: David J. Harvey
Author: Max Medina-Ramirez
Author: James D. Roser
Author: Rodman Smith
Author: David Westcott
Author: Brandon F. Keele
Author: Julian W. Bess
Author: Rogier W. Sanders
Author: Jeffrey D. Lifson
Author: John P. Moore
Author: Max Crispin ORCID iD

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