ISDA

Entry Detail

PDB ID:

5F6H

Keywords:

IMMUNE SYSTEM

Title:

Crystal Structure of Tier 2 Neutralizing Antibody DH427 from a Rhesus Macaque

Biological Source:

Source Organism:

Macaca mulatta

Host Organism:

Homo sapiens

PDB Version:

Deposition Date:

2015-12-06

Release Date:

2016-01-13

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.66 Å

R-Value Free:

0.26

R-Value Work:

0.23

R-Value Observed:

0.23

Space Group:

P 21 21 21

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Macromolecular Entities

Polymer Type:polypeptide(L)
Description:DH427 Antibody Heavy Chain
Chain IDs:B (auth: K), F (auth: I), G (auth: M), H (auth: O)
Chain Length:227
Number of Molecules:4
Biological Source:Macaca mulatta

Polymer Type:polypeptide(L)
Description:DH427 Antibody Light Chain
Chain IDs:A (auth: L), C (auth: J), D (auth: N), E (auth: P)
Chain Length:216
Number of Molecules:4
Biological Source:Macaca mulatta

Primary Citation

Structural Constraints of Vaccine-Induced Tier-2 Autologous HIV Neutralizing Antibodies Targeting the Receptor-Binding Site.

Bradley, T, Fera, D, Bhiman, J, Eslamizar, L, Lu, X, Anasti, K, Zhang, R, Sutherland, L.L, Scearce, R.M, Bowman, C.M, Stolarchuk, C, Lloyd, K.E, Parks, R, Eaton, A, Foulger, A, Nie, X, Karim, S.S, Barnett, S, Kelsoe, G, Kepler, T.B, Alam, S.M, Montefiori, D.C, Moody, M.A, Liao, H.X, Morris, L, Santra, S, Harrison, S.C, Haynes, B.F.Show

Cell Rep 14 43 54 (2016)

PMID: 26725118 DOI: 10.1016/j.celrep.2015.12.017

Abstact

Antibodies that neutralize autologous transmitted/founder (TF) HIV occur in most HIV-infected individuals and can evolve to neutralization breadth. Autologous neutralizing antibodies (nAbs) against neutralization-resistant (Tier-2) viruses are rarely induced by vaccination. Whereas broadly neutralizing antibody (bnAb)-HIV-Envelope structures have been defined, the structures of autologous nAbs have not. Here, we show that immunization with TF mutant Envs gp140 oligomers induced high-titer, V5-dependent plasma neutralization for a Tier-2 autologous TF evolved mutant virus. Structural analysis of autologous nAb DH427 revealed binding to V5, demonstrating the source of narrow nAb specificity and explaining the failure to acquire breadth. Thus, oligomeric TF Envs can elicit autologous nAbs to Tier-2 HIVs, but induction of bnAbs will require targeting of precursors of B cell lineages that can mature to heterologous neutralization.

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