8T4D image
Entry Detail
PDB ID:
8T4D
EMDB ID:
Title:
MD65 N332-GT5 SOSIP in complex with RM_N332_08 Fab and RM20A3 Fab
Biological Source:
PDB Version:
Deposition Date:
2023-06-09
Release Date:
2024-05-08
Method Details:
Experimental Method:
Resolution:
3.10 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:MD65 N332-GT5 SOSIP gp120
Chain IDs:A, G (auth: E), M (auth: F)
Chain Length:481
Number of Molecules:3
Biological Source:Human immunodeficiency virus 1
Polymer Type:polypeptide(L)
Description:MD65 N332-GT5 SOSIP gp41
Chain IDs:D (auth: B), J (auth: G), P (auth: I)
Chain Length:153
Number of Molecules:3
Biological Source:Human immunodeficiency virus 1
Polymer Type:polypeptide(L)
Description:RM20A3 heavy chain Fv
Chain IDs:B (auth: C), H (auth: J), N (auth: K)
Chain Length:125
Number of Molecules:3
Biological Source:Macaca mulatta
Polymer Type:polypeptide(L)
Description:RM20A3 light chain Fv
Chain IDs:C (auth: D), I (auth: M), O (auth: N)
Chain Length:128
Number of Molecules:3
Biological Source:Macaca mulatta
Polymer Type:polypeptide(L)
Description:RM_N332_08 heavy chain Fv
Chain IDs:E (auth: H), K (auth: O), Q (auth: P)
Chain Length:130
Number of Molecules:3
Biological Source:Macaca mulatta
Polymer Type:polypeptide(L)
Description:RM_N332_08 light chain Fv
Chain IDs:F (auth: L), L (auth: Q), R
Chain Length:113
Number of Molecules:3
Biological Source:Macaca mulatta
Ligand Molecules
Primary Citation

Abstact

Germline-targeting immunogens hold promise for initiating the induction of broadly neutralizing antibodies (bnAbs) to HIV and other pathogens. However, antibody-antigen recognition is typically dominated by heavy chain complementarity determining region 3 (HCDR3) interactions, and vaccine priming of HCDR3-dominant bnAbs by germline-targeting immunogens has not been demonstrated in humans or outbred animals. In this work, immunization with N332-GT5, an HIV envelope trimer designed to target precursors of the HCDR3-dominant bnAb BG18, primed bnAb-precursor B cells in eight of eight rhesus macaques to substantial frequencies and with diverse lineages in germinal center and memory B cells. We confirmed bnAb-mimicking, HCDR3-dominant, trimer-binding interactions with cryo-electron microscopy. Our results demonstrate proof of principle for HCDR3-dominant bnAb-precursor priming in outbred animals and suggest that N332-GT5 holds promise for the induction of similar responses in humans.

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Protein

Chemical

Disease

Primary Citation of related structures