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TitlePolyclonal antibody responses to HIV Env immunogens resolved using cryoEM.
Journal, issue, pagesNat Commun, Vol. 12, Issue 1, Page 4817, Year 2021
Publish dateAug 10, 2021
AuthorsAleksandar Antanasijevic / Leigh M Sewall / Christopher A Cottrell / Diane G Carnathan / Luis E Jimenez / Julia T Ngo / Jennifer B Silverman / Bettina Groschel / Erik Georgeson / Jinal Bhiman / Raiza Bastidas / Celia LaBranche / Joel D Allen / Jeffrey Copps / Hailee R Perrett / Kimmo Rantalainen / Fabien Cannac / Yuhe R Yang / Alba Torrents de la Peña / Rebeca Froes Rocha / Zachary T Berndsen / David Baker / Neil P King / Rogier W Sanders / John P Moore / Shane Crotty / Max Crispin / David C Montefiori / Dennis R Burton / William R Schief / Guido Silvestri / Andrew B Ward /
PubMed AbstractEngineered ectodomain trimer immunogens based on BG505 envelope glycoprotein are widely utilized as components of HIV vaccine development platforms. In this study, we used rhesus macaques to evaluate ...Engineered ectodomain trimer immunogens based on BG505 envelope glycoprotein are widely utilized as components of HIV vaccine development platforms. In this study, we used rhesus macaques to evaluate the immunogenicity of several stabilized BG505 SOSIP constructs both as free trimers and presented on a nanoparticle. We applied a cryoEM-based method for high-resolution mapping of polyclonal antibody responses elicited in immunized animals (cryoEMPEM). Mutational analysis coupled with neutralization assays were used to probe the neutralization potential at each epitope. We demonstrate that cryoEMPEM data can be used for rapid, high-resolution analysis of polyclonal antibody responses without the need for monoclonal antibody isolation. This approach allowed to resolve structurally distinct classes of antibodies that bind overlapping sites. In addition to comprehensive mapping of commonly targeted neutralizing and non-neutralizing epitopes in BG505 SOSIP immunogens, our analysis revealed that epitopes comprising engineered stabilizing mutations and of partially occupied glycosylation sites can be immunogenic.
External linksNat Commun / PubMed:34376662 / PubMed Central
MethodsEM (single particle)
Resolution2.9 - 20.0 Å
Structure data

EMDB-23175:
nsEM maps of BG505 SOSIP MD39 in complex with the polyclonal Fab samples from Group 1 of immunized rhesus macaques (Animal IDs: Rh.32034, Rh.32113, Rh.33104, Rh.33395, Rh.34909, Rh.34943)
Method: EM (single particle) / Resolution: 20.0 Å

EMDB-23176:
nsEM maps of BG505 SOSIP.v5.2 in complex with the polyclonal Fab samples from Group 2 of immunized rhesus macaques (Animal IDs: Rh.33182, Rh.33203, Rh.33311, Rh.34686, Rh.CD99, Rh.CG41)
Method: EM (single particle) / Resolution: 20.0 Å

EMDB-23177:
nsEM maps of BG505 SOSIP.v5.2(7S) in complex with the polyclonal Fab samples from Group 3 of immunized rhesus macaques (Wk8 time point; Animal IDs: Rh.33172, Rh.34919, Rh.34167, Rh.33065, Rh.33176, Rh.34725)
Method: EM (single particle) / Resolution: 20.0 Å

EMDB-23178:
nsEM maps of BG505 SOSIP.v5.2(7S) in complex with the polyclonal Fab samples from Group 3 of immunized rhesus macaques (Wk10 time point; Animal IDs: Rh.33172, Rh.34919, Rh.34167, Rh.33065, Rh.33176, Rh.34725)
Method: EM (single particle) / Resolution: 20.0 Å

EMDB-23179:
nsEM maps of BG505 SOSIP.v5.2(7S) in complex with the polyclonal Fab samples from Group 3 of immunized rhesus macaques (Wk26 time point; Animal IDs: Rh.33172, Rh.34919, Rh.34167, Rh.33065, Rh.34725)
Method: EM (single particle) / Resolution: 20.0 Å

EMDB-23180:
nsEM maps of BG505 SOSIP.v5.2(7S) in complex with the polyclonal Fab samples from Group 3 of immunized rhesus macaques (Wk38 time point; Animal IDs: Rh.33172, Rh.34919, Rh.34167, Rh.33065, Rh.34725)
Method: EM (single particle) / Resolution: 20.0 Å

EMDB-23181:
nsEM map of BG505 SOSIP.v5.2(7S) in complex with the polyclonal Fab sample from animal Rh.33172 (Wk26 time point)
Method: EM (single particle) / Resolution: 19.7 Å

EMDB-23182:
nsEM map of BG505 SOSIP.v3 in complex with the polyclonal Fab sample from animal Rh.33172 (Wk26 time point)
Method: EM (single particle) / Resolution: 19.7 Å

EMDB-23183:
nsEM map of BG505 SOSIP.v3 in complex with the polyclonal Fab sample from animal Rh.33311 (Wk26 time point)
Method: EM (single particle) / Resolution: 19.7 Å

EMDB-23184:
nsEM map of BG505 SOSIP.v5.2 in complex with the polyclonal Fab sample from animal Rh.33311 (Wk26 time point)
Method: EM (single particle) / Resolution: 18.7 Å

EMDB-23185:
BG505 SOSIP fused to a trimeric nanoparticle building block, T33-31A
Method: EM (single particle) / Resolution: 15.6 Å

EMDB-23186:
BG505 SOSIP fused to a trimeric nanoparticle building block, T33-31B
Method: EM (single particle) / Resolution: 15.6 Å

EMDB-23218, PDB-7l7t:
BG505 SOSIP reconstructed from a designed nanoparticle, BG505 SOSIP-T33-31 (Component A)
Method: EM (single particle) / Resolution: 3.7 Å

EMDB-23219, PDB-7l7u:
BG505 SOSIP reconstructed from a designed nanoparticle, BG505 SOSIP-T33-31 (Component B)
Method: EM (single particle) / Resolution: 3.8 Å

EMDB-23222, PDB-7l85:
Designed tetrahedral nanoparticle T33-31 presenting BG505 SOSIP trimers
Method: EM (single particle) / Resolution: 2.9 Å

EMDB-23223, PDB-7l86:
BG505 SOSIP MD39 in complex with the polyclonal Fab pAbC-1 from animal Rh.32034 (Wk26 time point)
Method: EM (single particle) / Resolution: 3.4 Å

EMDB-23224, PDB-7l87:
BG505 SOSIP MD39 in complex with the polyclonal Fab pAbC-2 from animal Rh.32034 (Wk26 time point)
Method: EM (single particle) / Resolution: 3.6 Å

EMDB-23225, PDB-7l88:
BG505 SOSIP MD39 in complex with the polyclonal Fab pAbC-3 from animal Rh.32034 (Wk26 time point)
Method: EM (single particle) / Resolution: 3.6 Å

EMDB-23226, PDB-7l89:
BG505 SOSIP MD39 in complex with the polyclonal Fab pAbC-4 from animal Rh.32034 (Wk26 time point)
Method: EM (single particle) / Resolution: 3.8 Å

EMDB-23227, PDB-7l8a:
BG505 SOSIP MD39 in complex with the polyclonal Fab pAbC-1 from animal Rh.33104 (Wk26 time point)
Method: EM (single particle) / Resolution: 3.3 Å

EMDB-23228, PDB-7l8b:
BG505 SOSIP MD39 in complex with the polyclonal Fab pAbC-2 from animal Rh.33104 (Wk26 time point)
Method: EM (single particle) / Resolution: 3.7 Å

EMDB-23229, PDB-7l8c:
BG505 SOSIP MD39 in complex with the polyclonal Fab pAbC-3 from animal Rh.33104 (Wk26 time point)
Method: EM (single particle) / Resolution: 3.4 Å

EMDB-23230, PDB-7l8d:
BG505 SOSIP MD39 in complex with the polyclonal Fab pAbC-4 from animal Rh.33104 (Wk26 time point)
Method: EM (single particle) / Resolution: 4.6 Å

EMDB-23231, PDB-7l8e:
BG505 SOSIP.v5.2(7S) in complex with the polyclonal Fab pAbC-1 from animal Rh.33172 (Wk38 time point)
Method: EM (single particle) / Resolution: 4.2 Å

EMDB-23232, PDB-7l8f:
BG505 SOSIP.v5.2(7S) in complex with the polyclonal Fab pAbC-2 from animal Rh.33172 (Wk38 time point)
Method: EM (single particle) / Resolution: 3.66 Å

EMDB-23233, PDB-7l8g:
BG505 SOSIP.v5.2(7S) in complex with the polyclonal Fab pAbC-3 from animal Rh.33172 (Wk38 time point)
Method: EM (single particle) / Resolution: 4.3 Å

EMDB-23234:
BG505 SOSIP.v5.2(7S) in complex with the polyclonal Fab pAbC-5 from animal Rh.33172 (Wk38 time point)
Method: EM (single particle) / Resolution: 4.5 Å

EMDB-23235, PDB-7l8s:
BG505 SOSIP.v5.2(7S) in complex with the polyclonal Fab pAbC-4 from animal Rh.33172 (Wk38 time point)
Method: EM (single particle) / Resolution: 4.3 Å

EMDB-23236, PDB-7l8t:
BG505 SOSIP.v5.2 N241/N289 in complex with the polyclonal Fab pAbC-1 from animal Rh.33311 (Wk26 time point)
Method: EM (single particle) / Resolution: 3.7 Å

EMDB-23237, PDB-7l8u:
BG505 SOSIP.v5.2 N241/N289 in complex with the polyclonal Fab pAbC-2 from animal Rh.33311 (Wk26 time point)
Method: EM (single particle) / Resolution: 4.5 Å

EMDB-23238, PDB-7l8w:
BG505 SOSIP.v5.2 N241/N289 in complex with the polyclonal Fab pAbC-3 from animal Rh.33311 (Wk26 time point)
Method: EM (single particle) / Resolution: 4.1 Å

EMDB-23239, PDB-7l8x:
BG505 SOSIP.v5.2 N241/N289 in complex with the polyclonal Fab pAbC-4 from animal Rh.33311 (Wk26 time point)
Method: EM (single particle) / Resolution: 3.0 Å

EMDB-23240, PDB-7l8y:
BG505 SOSIP.v5.2 N241/N289 in complex with the polyclonal Fab pAbC-5 from animal Rh.33311 (Wk26 time point)
Method: EM (single particle) / Resolution: 4.2 Å

EMDB-23241:
BG505 SOSIP.v5.2 N241/N289 in complex with the polyclonal Fab pAbC-6 from animal Rh.33311 (Wk26 time point)
Method: EM (single particle) / Resolution: 6.6 Å

EMDB-23242, PDB-7l8z:
BG505 SOSIP.v5.2 N241/N289 in complex with the polyclonal Fab pAbC-7 from animal Rh.33311 (Wk26 time point)
Method: EM (single particle) / Resolution: 3.8 Å

EMDB-23243, PDB-7l90:
BG505 SOSIP.v5.2 N241/N289 in complex with the polyclonal Fab pAbC-8 from animal Rh.33311 (Wk26 time point)
Method: EM (single particle) / Resolution: 4.5 Å

Chemicals

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose

Source
  • human immunodeficiency virus 1
  • macaca mulatta (Rhesus monkey)
  • Rhesus monkey (Rhesus monkey)
KeywordsVIRAL PROTEIN / HIV / vaccine design / protein design / nanoparticles / BG505 / DE NOVO PROTEIN / VIRAL PROTEIN/Immune System / Polyclonal antibodies / EMPEM / VIRAL PROTEIN-Immune System complex

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